Label x and y axis values in plot with matrix cols and rows names

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I have the following matrix and then I paint it according to intervals as shown below

mdat <- matrix(c(0.25,0.45,0.3, 0.75,0.15,0.62,0.40,0.90,1, 0.45,0.15,0), nrow = 4, ncol = 3, byrow = TRUE) 



plot(rep(1:4, 3), mdat, pch=15, cex=2.5,
                   col=c("red","orange","blue", "green")[findInterval(mdat, c(0,.25,.5,.75, 1.1))])

And it works fine as shown in the image.

But now if I define

dimnames(mdat) <- list(  c("row1", "row2", "row3","row4"), c("col1", "col2", "col3"))

I need to change in the plot the values in x axis and in the y axis to be row1..row4 instead of the values 0.0.. 1.0 and col1.. col3 instead of 1.0.. 4.0

asked 2 mins ago

user3437823

12