Hello everyone, I'm trying to generate a correlation heatmap for expression values of my RNAseq samples using qplot function in ggplot2. I could generate the heatmap using the below code and it's default color is blue. Now I need to change the color of the map to a red to yellow gradient and also to change the axes text size and color. Can anyone help me with this?
qplot(x = Var1 , y=Var2, data=melt(cor(correlation)), fill=value, geom="tile")
Thank you in advance!