I am trying to plot a matrix of values over a range using heatmap.2. The columns are the range (for example, 0 to 100). There are too many column labels to display clearly. Is there a way to display every Nth one (0, 10, 20, etc)? I want all the values to be displayed, but I just don't want them all to be labeled.
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1Can you give an example of your dataframe/dataset please? – Docconcoct Mar 10 '15 at 19:32
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Do you require the dendrogram? – JasonAizkalns Mar 10 '15 at 20:24
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No dendogram required, since there is no clustering. I am really just visualizing measurements over a time period. – burger Mar 11 '15 at 15:49
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Inserting the labels into a vector of NAs and passing it to the labCol argument worked for me.
library(gplots)
m <- matrix(rnorm(1000), ncol=100)
labvec <- c(rep(NA, 100))
labvec[c(1,20,40,60,80,100)] <- c(1,20,40,60,80,100)
heatmap.2(m, trace="none", Rowv = T, Colv = F, labCol = labvec, srtCol = 0)
The srt argument can also be used to turn the labels horizontal.
Joe
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