Change title fontsize in heatmap.2 function?

Question

I am using the `heatmap.2` package to make a heatmap: ``` heatmap.2(as.matrix(FOOBAR.txt[rowSums (abs(FOOBAR.txt)) != 0,]), col=scaleyellowred, margins = c(10, 20), trace="none", xlab = "Comparisons", ylab ="gene", lhei = c(2, 8), scale=c("none"), symbreaks=T, cexRow=0.5, cexCol=.7, main="gene comparisons") ``` The output gives me a heatmap look like I want and looks good with the exception that the main title font is large. How do I decrease the font size of the title? I can't seem to figure it out. I can alter the font of the axis labels but not the title.

Accepted Answer

`heatmap.2` use this statement to print plot title:

```
title(main, cex.main = 1.5 * op[["cex.main"]])
```

So You should set `cex.main` argument in `par` list. For example:

```
par(cex.main=0.5) ## this will affect also legend title font size
```

Change title fontsize in heatmap.2 function?

Solution

Problem