R Heat Map , Labels on Y axis coming out to be very close

Question

I am using R to plot the heat map of a data in CSV file (10 (Columns) Conditions and 1000 (Rowa))

Following is the Code I am using ..

nba <- read.csv("1317754115.csv", sep=",")
nba_matrix <- data.matrix(nba)
cexRow = 0.2 + 1/log10(1000),
cexCol = 0.2 + 1/log10(10),
nba_heatmap <- heatmap(nba_matrix, Rowv=cexRow, Colv=cexCol, 
    col = heat.colors(256), scale="column", margins=c(5,10))

Heat Map Image

Now Rows on right hand sides are very close so I can not read the label names ,

Can some one please tell me how can i show all labels on Y-Axis

Thanks

Solution

You can't change the aspect ratio with the base heatmap function. To get this functionality, see heatmap.2 in the gplots package, or aspectHeatmap in the ClassDiscovery package. Here's an example:

require(gplots)

nrow = 100
ncol = 10

set.seed(12345)
row.names = replicate(nrow, paste(letters[sample(10)], collapse=''))
col.names = replicate(ncol, paste(letters[sample(10)], collapse=''))

values = matrix(runif(nrow*ncol), nrow=nrow, dimnames=list(row.names, col.names))

dev.new(width=5, height=10)
heatmap(values)
dev.new(width=5, height=10)
heatmap.2(values)

Comments

[Stedy]

don't forget to add the image you are currently getting from your plot

[KAPILP]

Sorry , I missed the Image , I have added the link for the heatmap

[KAPILP]

Thank you John , My Heat Map looks much better now