问题
I have an Excel file with two different columns. One column have values ranging from 2 to 15 and other column have values ranging from positive to negative numbers.
I want to produce a heatmap in such a way that for first column each value should have a different color. Second column should be in the form of a gradient.
I tried using excel conditional formatting to do this.
But I want to know is there any way to do it in R?
回答1:
The R command image() takes a matrix and makes a heat-map from it. see the help page: ?image. Also worth considering is the heatmap function, which is basically image() with some clustering applied. Below are two examples from these two plotting routines:
image(volcano,col = terrain.colors(30))
heatmap(volcano,col = terrain.colors(30))
Probably the easiest way to export your data from Excel to R is to save it as a .csv file (comma or tab-separated text file), and then import it using read.table()
回答2:
You can easily create an interactive heatmap in R using plotly:
library(plotly)
plot_ly(z = volcano, type = "heatmap")
More instructions here.
来源：https://stackoverflow.com/questions/6998259/heatmap-generation