Hello:
I have a tab delim file with 100 rows and 100 columns.
I have numerical values in this table. What I want is to create an image
color map with color gradation.
my values range from -5 to 0. max value is 0.
to acheive this, I need to convert my data.frame into matrix.
I tried following :
mydf <- read.table('mytable',sep='\t',header=T)
mydf1 <- mydf[,2:100]
colnames(mydf1) <- as.character(mydf[,1])
here comes the trouble:
mymat <- as.matrix(mydf1)
-- numerical values become character values. -1 becomes "-1"
mymat <- data.matrix(mydf1)
-- whole matrix is filled with 1,2 and 3.
Is there any other way I can do this.
say row names are city schools
colnames are student names
appreciate your help.
Thanks
AJ
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