Ggplot Pie Chart

Excellent E-book sur GGPlot 2 en français et en couleurs de mon collègue Daname Kolani! Cet e-book est un échantillon des sujets que nous traîtons dans les formations R et GGPlot 2 que nous dispensons. Adding a legend to a pie chart Sometimes we may wish to use a legend to annotate a pie chart instead of using labels. (Pie charts are generally frowned upon, so you better have a really good reason to use them. Interactive Charts using R and Power BI: Create Custom Visual Part 3 Posted on July 10, 2017 by Leila Etaati In the last two posts ( Part 1 and 2 ), I have explained the main process of creating the R custom Visual Packages in Power BI. R’s version is ggplot2, created by Hadley Wickham and currently maintained by dozens from the R community. Save the Pies of Dessertby Stephen Few. This is the first post which is on ggplot using R. Pie chart ggplot2 are the perfect content material format for visualizing approaches commands and techniques The flowchart maker includes practical growth gear to simply connect all types of shapes and lines. I have recreated the template in Excel 2007 and the same problem has occured. To do this, you’ll need to have R and ggplot2 installed. Anywho, here is the breakdown of visits to this blog, visualized using #ggplot2, of course. compute the proportion (counts/total) of each category; compute the position of the text labels as the cumulative sum of the proportion. Multiple graphs on one page (ggplot2. That is suppose both f1 and f2 are factor variables and each of them takes two values and boxthis is a continuous variable. You can do it with python and the matplotlib library. pie chart can convey your point in a way that many of the general public will find easy to understand for example this is how i u ve spent my work. Description. The x-axis depicts the time. Pass the descriptions contained in labels to the legend function. js graphs with R. Want to see the difference? Here's an example of the same data set displayed as a pie graph and a bar graph: Image Credit: Wikimedia. The output folder contains one pie chart image in png format and one legend image in pdf format (by default) for each sample. My first attempt at building a pie chart of this data follows the ggplot2 documentation for coord_polar and this excellent post on r-chart. What Is Project In The Mix? Part 1- Data Collection, Pie Charts we initialize the ggplot2 system, read in the data and store it in a table, an easy task as it was. It is built for making profressional looking, plots quickly with minimal code. Footage of analysts operating Excel 2. A bar chart or dot chart is a preferable way of displaying this type of data. And here I thought pie charts couldn’t get worse… i’m not a fan at all of the ggplot version. The goal of this article is to describe how to change the color of a graph generated using R software and ggplot2 package. Simple Pie Chart # Simple. ; Task 2: Use the xlim and ylim arguments to set limits on the x- and y-axes so that all data points are restricted to the left bottom quadrant of the plot. Are there other alternatives to pies that should be added to this list?. Here's a quick demonstration of the trick you need to use to convince R and ggplot to do it. Instead of using the actual dataset, a sample data representing a completely different topic (portfolio asset allocation) is used for illustration purpose only. The slices are labeled and the numbers corresponding to each slice is also represented in the chart. Become an expert in data visualization in R by mastering the core functionality of ggplot2 You already know the basics of Data Visualizations with R but this isn't enough. Pie chart in r ggplot2 are the perfect content format for visualizing procedures commands and techniques The flowchart maker contains practical growth equipment to simply attach all types of shapes and lines. It's easy to combine a column chart and a line chart. I want to draw a geographic map with pie charts placed as markers for illustrating some statistics. For instance, consider this simple bar chart: Then create a pie chart to see what. - saveChart. The data for the examples below comes from the mtcars dataset. DataNovia is dedicated to data mining and statistics to help you make sense of your data. What Is Project In The Mix? Part 1- Data Collection, Pie Charts we initialize the ggplot2 system, read in the data and store it in a table, an easy task as it was. please help. to draw a chart I first use "ggplot" function to draw a two dimensional chart. The basic syntax for creating a pie chart using the R is:. Here I create a function that sorts the underlying factors and then apply that function in ggplot. 검색해보니 Pie Gauge Chart라는 명칭으로 부르는 것 같다. The scatterplot plots points on grid. After looking at the long term growth of the stock price, it occurred to me that visualizing the stock price data would be a great example of how to create a line chart in R using ggplot2. Examples of how to make basic charts. And here I thought pie charts couldn’t get worse… i’m not a fan at all of the ggplot version. A good example of this can be seen below. Sankey Diagram Color. Getting us really close to the WSJ pie charts: I should say that a pie chart in ggplot is difficult to customize because you lose one axis. The basic syntax for creating a pie chart using the R is:. Network visualizations in ggplot2. To switch to one of these pie charts, click the chart, and then on the Chart Tools Design tab, click Change. Simple Pie Chart # Simple. Creating a True Pie Chart When I saw how they were creating a Coxcomb this way, I immediately started to consider how I could use these tools to create a regular pie chart. Hence, this short organizational note that you may find useful. Bar graphs of values. Ez a fájl a Creative Commons CC0 1. There are a few defenders of pie charts with articles like “Why Tufte is flat out wrong about pie charts” and “In defense of pie charts” but they don’t have any big-name champions. Pie charts are created by transforming a stacked bar chart using polar coordinates. Create a dataset- Sales of different region region<-c("US","Europe","Japan","China","Others") sales<-c(25000,12000 ,10000,5000,2000) region_sales<-data. Can anybody please help. (For example, if I have a map of the US, I can add a pie chart to each state). finally I also interested to shows the car cylinder in chart. Bar Graph Basics. By default, it is possible to make a lot of graphs with R without the need of any external packages. A scatter chart works best when comparing large numbers of data points without regard to time. R Ggplot2 Pie Chart Donut Chart I Am Trying To Replicate This Enter Image Description Here. New to Plotly? Plotly's R library is free and open source! Get started by downloading the client and reading the primer. Given their low data-density and failure to order numbers along a visual dimension, pie charts should never be used. : “red”) or by hexadecimal code (e. Polar coordinates are also used to create some other circular charts (like bullseye charts). Create Basic Sunburst Graphs with ggplot2. Pie Chart A common plot that is frequently used in popular media is the pie chart, where the size of a "wedge of pie" helps the reader visualize the percentage of data falling in a particular category. A bar chart is a great way to display categorical variables in the x-axis. Keeping track of ordered categories in a pie chart is harder again, especially when we want to make a comparison between two distributions. Welcome the R graph gallery, a collection of charts made with the R programming language. I tried the below code, seems like it works fine but the pie charts are not complete. •Most graphs presented in Excel are POOR CHOICES! • In particular, never use a pie chart! I Make sure that the graph is complete: • All axes must be labeled. We'll use a single group (x = factor(1)) to bring all values together and fill on the column of interest to divide the area. – Even if the dialog box is labeled as Chart, if you constructed a graph indicate this both charts and graphs as figures. Legends (ggplot2) Lines (ggplot2) - Add lines to a graph. You can either create the table first and then pass it to the pie() function or you can create the table directly in the pie() function. The barplot() function takes a Contingency table as input. pie chart with percentage and labels. bar plot) I never a pie chart I see e. Bar Graphs In R With ggplot2 Hi there. color name color name gray8 gray9 gray10 gray11 gray12 gray13 gray14 gray15 gray16 gray17 gray18 gray19 gray20 gray21 gray22 gray23 gray24 gray25 gray26 gray27 gray28. First, let’s get some. Save the Pies of Dessertby Stephen Few. Creating a pie chart in ggplot takes some thought. Length Petal. While the column chart isn't as bad for time series as the pie chart is for comparing parts of a whole, the line chart is the better option as it provides more help to our eyes when we try to figure out how a value is developing over time. 2 Pie charts. formatting to the chart. The authors recommend bar or dot plots over pie charts because people are able to judge length more accurately than volume. Creating interactive visualizations with R, ggplot2 & Shiny. The following figures are examples of I want to achieve. value=inside causes the frequency count to be placed inside the pie slice. js library, nice since it makes some specific plots easier to create (such as winrose, radarchart or funnel). These scatter plots can. Plotting item distribution Typical stacked bar plot. R: ggplot - Cumulative frequency graphs. In this tutorial article, I will show you how to add charts to your Google Sheets, how to edit the legend that Google Sheets assigns to your charts, and how to edit some other chart features. There are a ton of articles out there explaining the disadvantages of pie charts, which is why they rarely turn up in our work. Using a color blind friendly palette doesn’t mean you need to compromise on aesthetics or strip out all the color from your charts. GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Incell Chart; Conditional Formatting; If you like this tutorial, you may also like Conditional Colors in Column Chart which is a very similar chart with a different aim. This part of the chart passes the self-sufficiency test. The pie() function takes a Frequency table as input. ggplot(mydata100, aes(x = factor(""), fill = workshop) ) + geom_bar() The x-axis comes out labeled as “factor(“”)” but we can over-write that with a title for the x-axis. How to Replace a Pie Chart With R So here I'll show how I would have created a different graph (using R and ggplot2) to communicate the same information. The final chart creating using ggplot2 appears above. ggplot10 pie and donut chart on same plot – Stack Overflow – pie chart in r ggplot | pie chart in r ggplot Gallery for 10 Ways On How To Prepare For Pie Chart In R Ggplot | Pie Chart In R Ggplot. By default, any series added to a non-Shape chart in a Reporting Services paginated report will be added as an item in the legend. search("waffle") No help files found with alias or concept or title matching ‘waffle’ using fuzzy matching. Is it possible to create a donut chart in R? Can someone explain? @Kruthi, Refer to this blog on how to create a pie chart, then follow the below steps. GoWvis represents any piece of text inputted by the user as a graph-of-words and leverages graph degeneracy and community detection to generate an extractive summary (keyphrases and sentences) of the inputted text in an unsupervised fashion. I've been bowling once per year at a charity event for the last few years and have kept track of the outcomes to share my group. The human brain is much better at assessing distance than it is area and angle, so people perceive bar charts more accurately than they do pie charts. frame(region. These labels are trying too hard to provide precise data to the reader. I think I saw like one instance where a donut made stylistic sense over a pie. 2 Must avoid pie charts! One of the most common plots used to visualize the distribution of categorical data is the pie chart. (For example, if I have a map of the US, I can add a pie chart to each state). The pie we produced in ggplot2 is actually a barplot transform to polar coordination. To make the chart most meaningful and easier to. Some good and bad things about this chart. library("ggplot2") Now you can save the previous plot as a variable, let’s call it p, and then add additional ggplot2 layering instructions that will, in effect, remove the dividing lines that separate OTUs from one another in the previous plot. Lollipop Charts. Dumbbell charts are useful for displaying change between two time points for several groups or observations. Small multiples. They are also not friendly for colorblind viewers. x: variable containing values for drawing. pie chart in ggplot2. They are also registered under two aliases in the Chart core. As you can see by the screenshot- it makes ggplot even easier for people (like R newbies and experienced folks alike) This package is an R Commander plug-in for Kaplan-Meier plot and other plots by using the ggplot2 package. GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Anywho, here is the breakdown of visits to this blog, visualized using #ggplot2, of course. On the design surface, right-click on the pie and select Show Data Labels. 6 Radar charts. com/LeahBriscoe/HowToMakePie. ) Plan out your color scheme beforehand. A bar graph or bar chart displays categorical data with parallel rectangular bars of equal width along an axis. formatting to the chart. The car package can condition the scatterplot matrix on a factor, and optionally include lowess and linear best fit lines, and boxplot, densities, or histograms in the principal diagonal, as well as rug plots in the margins of the cells. Basic Pie Chart¶. The following figures are examples of I want to achieve. August 29, 2013 Type Package Title An implementation of the Grammar of Graphics Version 0. docx from ITS 530 at University of the Cumberlands. Chronicling my attempts at trying to automate plot generation using the ggplot2 library in R for one of the projects I am working on. They are also not friendly for colorblind viewers. You can choose one of three chart makers to visualize your data and make your point: the pie chart maker, the donut chart maker, or the bar chart maker. " Themes will be covered in-depth. DataNovia is dedicated to data mining and statistics to help you make sense of your data. One argument used in favor of pie charts is that their circular shape efficiently conveys to the viewer that they are looking at. ggplot (Wage, aes (education, fill = education)) + geom_bar We will now modify two parts of the code. It provides a high-level interface for drawing attractive and informative statistical graphics. To make a bar chart with ggplot2 in R, you use the geom_bar() function. I created a simple pie chart using information about the revenue sources of 2012-13 Florida’s Broward County Libraries Division. colors() Choose your own colour to generate a pie chart. If you don’t have R set up and installed, enter your name and email in the sidebar on the right side of the page and we’ll send you a pdf to help you get set up. Last week's blog post about Amazon's search for a location for a second headquarters left me thinking about the company's growth. Polar coordinates are also used to create some other circular charts (like bullseye charts). pdf), Text File (. Plotly Graphs in Shiny. Plotting pies on ggplot/ggmap is not an easy task, as ggplot2 doesn’t provide native pie geom. Length Petal. Posts about geom_bar written by rhandbook. People often describe plots by the type of geom that the plot uses. A pie chart go. In the example below, we'll compare dogs, pigs, and cows in terms of body size, brain size, and sleep characteristics (total sleep time, length of sleep cycle, and amount of REM sleep). 2 Must avoid pie charts! One of the most common plots used to visualize the distribution of categorical data is the pie chart. A presentation created with Slides. In fact, the eyeballs contain the most interesting story in this chart. Examples can be Stock market value over time, GDP overtime, etc. want to add an image bottom the chart. When to use pie charts: Jorge Camoes does a great job in his blog post on the optimal number of categories in a pie chart. And here I thought pie charts couldn’t get worse… i’m not a fan at all of the ggplot version. I am having trouble with pie charts. So, it's good to keep in mind that this is applicable better for Percentages. Download the Excel template with bar chart, line chart, pie chart, histogram, waterfall, scatterplot, combo graph (bar and line), gauge chart,. r - ggplot2 pie and donut chart on same plot. There are also a number of relevant questions on StackOverflow. 0 to make pie charts c. Along with adding support for filling in the chart as shown in the @eagereyes post, there will also be an htmlwidget version coming as well. Adding a legend to a pie chart Sometimes we may wish to use a legend to annotate a pie chart instead of using labels. JavaScript charts for web and mobile apps. Since the human eye is relatively bad at judging angles, other types of charts are appropriate than pie charts. I’d like to create plots like the graphs 5,6,18 in the paper. Along with the pie chart image , there is a hyperlink for the legend image within the html file. Pie Chart is very useful in comparing contribution of various categories in the the overall or total value. The XY Chart Labeler is a useful Add-ins to add, move, manage and delete the chart labels, you can download here: The XY Chart Labeler. A bar chart uses height to represent a value, and so the base of the bar must always be shown to produce a valid visual comparison. The piechart() function above is a little unappealing because it requires the user to know the exact aes() specification that generates a pie chart. By default, it is possible to make a lot of graphs with R without the need of any external packages. Color charts. Below, I’m going to show you some simple code to create a scatterplot in R using the ggplot2 package. A Line Graph is most frequently used to show trends and analyse how the data has changed over time. Footage of analysts operating Excel 2. Ggplot is a python visualization library based on R’s ggplot2 and the Grammar of Graphics. However, in this chapter, we are going to learn how to make graphs using {ggplot2} which is a very powerful package that produces amazing graphs. Use a line chart if you have text labels, dates or a few numeric labels on the horizontal axis. The function returns a ggplot object, so fonts, sizes, etc can all be customized and the source is up on github for all to play with and contribute to. Examples of grouped, stacked, overlaid, filled, and colored bar charts. The basic syntax for creating a pie chart using the R is:. class: center, middle, inverse, title-slide # Visualisation with ggplot2 ## https. This is the first post which is on ggplot using R. Ggplot2 pie chart are the perfect content material format for visualizing approaches instructions and systems The flowchart maker contains practical growth equipment to easily connect all types of shapes and lines. We'd end up with a pie chart - it's simply a bar chart transformed onto a polar coordinate system. Note that the "width" and "height" of a text element are 0, so stacking and dodging text will not work by default, and axis limits are not automatically expanded to include all text. In the adjacent pie chart, try to figure out which group is the biggest one and try to order them by value. All gists Back to GitHub. There you go! We have plotted the distribution of death causes per country in the world map. The measurements are averaged over the 5 hours around midday except for rainfall, which is averaged over a week. ggplot (mpg, aes ( x = factor ( 1 ), fill = drv)) + geom_bar (). Standard drill applies: issues/enhancements to github. Hi, even I was searching for this answer, I found the way later. Let's create a simple pie chart using the pie() command. How to make Pie Charts. I am very new to R and to any packages in R. The additional parameters are used to control labels. Course/Grammar of Graphics Intro 50 xp Familiarizing with disease data 100 xp Warming up data-wrangling 100 xp. To do this, you’ll need to have R and ggplot2 installed. Line Charts are used to display quantitative values over a continuous interval or time period. Add text outside the chart area of a ggplot2 graph in R and save the resulting chart to a png file. Hi, i found out how to plot a pie chart using ggplot, but how to display % value inside chart. Display a horizontal legend below the pie chart. The additional parameters are used to control appearance of pie charts in R are labels, color, title etc. Matplotlib supports pie charts using the pie() function. Pie charts are created by transforming a stacked bar chart using polar coordinates. It can be implemented using the coord_polar() function. R graphics with ggplot2 workshop notes. There were a total of about 23,000 pageviews in the first year of this blog. The chart illustrates a study of time spent by assistant and associate professors. You want to use colors in a graph with ggplot2. Graphics for Statistics - figures with ggplot - Chapter 2 Part 3 - Pie Charts Graphics for Statistics - Chapter 2 - Pie Charts: Figures 2. ) Plan out your color scheme beforehand. pie (self, **kwargs) [source] ¶ Generate a pie plot. (aka pie chart)? Building interactive visualizations with R, ggplot2 & Shiny. We will need to. On the x-axis we would like to have each item (i1, i2, …), and on the y-axis the frequency of each answer, in some stapled bar fashion. Using the gapminder dataset let’s plot the change in life expectancy from 1952 to 2007 in the Americas. We have generated the 3D pie chart using traumatic brain injury data, also used in Chapter 5, The Pie Chart and its Alternatives. Solarized Light stylesheet. js, but have one different default value - their cutoutPercentage. ggplot2 Quickref Basics tasks. Using a color blind friendly palette doesn’t mean you need to compromise on aesthetics or strip out all the color from your charts. Creating the map. scatterpie: scatter pie plot Guangchuang Yu School of Basic Medical Sciences, Southern Medical University 2019-09-26. In discussing the bar-density and pie-density charts with a buddy (thanks LB!), it became obvious that the labeling is a challenge. ggplot(mydata100, aes(x = factor(""), fill = workshop) ) + geom_bar() The x-axis comes out labeled as “factor(“”)” but we can over-write that with a title for the x-axis. ggplot2 is one of the most sophisticated and advanced packages of R and its use is constantly growing in the community of R programmers. pie charts in r examples plotly. If you don’t have R set up and installed, enter your name and email in the sidebar on the right. How to make pie charts in R using plotly. The default colors in ggplot2 can be difficult to distinguish from one another because they have equal luminance. This tutorial will give you a step by step guide to creating grouped and stacked bar charts in R with ggplot2. ggplot's geom_text() labelling of pie chart hides the pie made by geom_bar() Question: r,ggplot2 Is there an equivalent in ggplot2 to plot this dataset? I use. I needed to create a dual-axis chart, with two bars on the primary axis and a line on the secondary axis. Given their low data-density and failure to order numbers along a visual dimension, pie charts should never be used. Regards, P. Back to Gallery Get Code Get Code. ggplot (Wage, aes (education, fill = education)) + geom_bar We will now modify two parts of the code. To make a bar chart with ggplot2 in R you use the geom_bar() function To emulate the percentage view of a pie chart a 10x10 grid should be used with each 3 9 For example to create a histogram of the depth of earthquakes in How to We can install and load these packages at the beginning of the R file How to. You will probably struggle to do so and this is why pie charts must be avoided. Graphics for Statistics - figures with ggplot - Chapter 2 Part 2 - Bar Chart Flavours Graphics for Statistics - Chapter 2 - Bar Charts: Figures 2. The goal here was to associate the pie charts with specific points on the map, and not necessarily regions. This is already a good solution to the problem at hand! Let's take it one step further and convert this plot in a pie chart. Network visualizations in ggplot2. 25 # transparency of curves in geom_curve > angle <- 0. this one has 1 single graph overlayed with the 2nd number/graph but i want 2 graphs that are side by side, such as a Before/After for 10 different items. load the library ggplot2, if you have not installed it yet - install it via install. However, it is much more appreciated on a data viz point of view, as explained in data-to-viz. The polar coordinate system is most commonly used for pie charts, which are a stacked bar chart in polar coordinates. Polar coordinates are also used to create some other circular charts (like bullseye charts). A pie-chart is a representation of values as slices of a circle with different colors. For this example, we'll use some sample data showing global market share for mobile phone manufacturers. Pie and doughnut charts are effectively the same class in Chart. This also serves as an example of. The default look and feel of figures made with ggplot leaves something to be desired. The dataset is in long format. The function returns a ggplot object, so fonts, sizes, etc can all be customized and the source is up on github for all to play with and contribute to. js, a wrapper for the Chart. Plotting pies on ggplot/ggmap is not an easy task, as ggplot2 doesn’t provide native pie geom. A R documentation website. Creating a Pie Chart in R. I notice that ArcGIS appears to have features to add pie charts onto the maps themselves. We have generated the 3D pie chart using traumatic brain injury data, also used in Chapter 5, The Pie Chart and its Alternatives. I have been trying to make a pie chart in ggplot2 with a custom function to get percentage labels, but it doesn't seem to work and I'm not sure how to modify it to get it to work. pie chart with ggplot2 with specific order and percentage annotations. Introduction. I have exactly the. Pie Charts: When do you use Pie Chart? Pie chart is one of the ways to visualise data and analysis results. View options Edit in jsFiddle Edit in CodePen Edit in Highcharts Cloud. class: center, middle, inverse, title-slide # Visualisation with ggplot2 ## https. ggplot2 now has an official extension mechanism. It turns out ggplot automatically generates discrete colors by automatically picking evenly spaced hues around something called the hcl color. You will probably struggle to do so and this is why pie charts must be avoided. It is a circular graphic which is divided into slices to illustrate numerical proportion. Using the gapminder dataset let's plot the change in life expectancy from 1952 to 2007 in the Americas. Hundreds of charts are present, always realised with the python programming language. Hey, I am new to EXTJS. JavaScript charts for web and mobile apps. Creating a pie chart is not a straightforward process in the ggplot framework, since Tufte deemed them bad, they aren't worth proper attention. A Tale of Two Charting Paradigms: Vega-Lite vs R+ggplot2 posted in d3 , Data Visualization , DataVis , DataViz , ggplot , HTML5 , R , vega , vega-lite on 2016-02-28 by hrbrmstr. I have exactly the. The two charts above are showing the exact same data. Pie chart has been criticized for being a poor visualization and is not recommended in R community. It's easy to combine a column chart and a line chart. To convert the stacked bar chart into a pie chart, we simply add an additional ggplot command coord_polar to plot the data in polar coordinates. Since the human eye is relatively bad at judging angles, other types of charts are appropriate than pie charts. Why is the one text label in the pie chart offset? Is there a way to fix the label in the bar chart that is overlapping the other part of the bar?. Standard drill applies: issues/enhancements to github. Titles (ggplot2) Problem. Pie charts show the proportion of each category as wedges on a circle. In the previous parts of this tutorial we made a basic bar chart in HTML and then in SVG; now, we’ll improve the display by rotating the chart into columns and adding axes. # R Graphic # Powerful Graphics for Research Version 1 # ----- # # (1) The 3 Basic Graphical Tools / Packages # # ----- # # ----- # # Load Library # # ----- # library. Pie chart with broken down slices Dynamic data updates. August 29, 2013 Type Package Title An implementation of the Grammar of Graphics Version 0. While the column chart isn’t as bad for time series as the pie chart is for comparing parts of a whole, the line chart is the better option as it provides more help to our eyes when we try to figure out how a value is developing over time. The first one counts the number of occurrence between groups. One of the best things is that this chart looks pretty awesome in presentations and dashboards rather than the archaic pie charts; This chart lacks analytical rigor – Only shows the position of the city and if the sales (bubbles) larger or smaller compared to other cities. Plotting in R for Biologists is a beginner course in data analysis and plotting with R, designed for biologists as a starting point for plotting your own data. Brian Diggs At least with ggplot, yes. Then a simple formula copied down would have given you your chart data. Plotly Graphs in Shiny. If you’ve read my blog, taken one of my classes, or sat next to me on an airplane, you probably know I’m a big fan of Hadley Wickham’s ggplot2 package, especially compared to base R plotting. A piechart is a circle divided into sectors that each represent a proportion of the whole. A simple google search should come up with lots of arguments against pie charts. pie chart with percentage and labels. Examples of how to make basic charts.