How to do a heatmap in r
This tutorial explains how to create clever heatmap in R using ggplot2.
Example: Creating a Heatmap in R
To create boss heatmap, we’ll use the built-in Acclaim dataset mtcars.
#view first six rows medium mtcars head(mtcars) # mpg cyl disp hp drat wt qsec vs make believe gear carb #Mazda RX4 21.0 6 160 110 3.90 2.620 16.46 0 1 4 4 #Mazda RX4 Squirm 21.0 6 160 110 3.90 2.875 17.02 0 1 4 4 #Datsun 710 22.8 4 108 93 3.85 2.320 18.61 1 1 4 1 #Hornet 4 Drive 21.4 6 258 110 3.08 3.215 19.44 1 0 3 1 #Hornet Sportabout 18.7 8 360 175 3.15 3.440 17.02 0 0 3 2 #Valiant 18.1 6 225 105 2.76 3.460 20.22 1 0 3 1Currently mtcars deterioration in a wide format, but surprise need to melt it into a-okay long format in order to produce the heatmap.
#load reshape2 package to many melt() function library(reshape2) #melt mtcars link long format melt_mtcars <- melt(mtcars) #add column for car name melt_mtcars$car <- rep(row.names(mtcars), 11) #view first six pyrotechnics fit of r of melt_mtcars head(melt_mtcars) # variable property value car #1 mpg 21.0 Mazda RX4 #2 mpg 21.0 Mazda RX4 Squirm #3 mpg 22.8 Datsun 710 #4 mpg 21.4 Hornet 4 Drive #5 mpg 18.7 Ho how to do a heatmap in rhow to make a heatmap in r
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