How to create Polar Charts

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In this post I am going to show how to create a polar chart using R codes inside Power BI.

imagin that we have below dataset about 4 main groups and their related values.

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I am going to show you how to draw different polar charts with different shapes.

imagin that we have a bar chart created from below codes, first, I am using “ggplo2″ package for this aim.Next, in aes function , x axis will have the group name, y axis will have the value of each group, and the fill color has the group name. then I used geom_bar function to draw a simple bar chart

the result of running the code in Power BI is below chart:

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Now, I am going to change the chart into a simple polar chart, first based on Y axis value then based on x axis value.

y-axis polar chart

 

I just add a layer to the above furmula “coord_polar()” this function also has been used for creating pie charts. it gets the “theta” variable, in below example I put theta=y axis, so we have below charts

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X- axis Value

I able also to change the theta varibale to x axis to have a chart based on x,

I wrote below codes

the result of runig the above code would be below chart, as you see the bar chart has been change to a polar bar chart.

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Redffrence :http://ggplot2.tidyverse.org/reference/coord_polar.html

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Leila Etaati
Dr. Leila Etaati is Principal Data Scientist, BI Consultant, and Speaker. She has over 10 years’ experience working with databases and software systems. She was involved in many large-scale projects for big sized companies. Leila has PhD of Information System department, University of Auckland, MS and BS in computer science. Leila is Microsoft Data Platform MVP.

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