[R] heatmap is producing unwanted horizontal and vertical lines?

Hello, I must start by saying that I am an R novice and am sorry if this is a no-brainer... I have an csv file that contains a grid of 300x300 data points. Each point represents a 1Km square on a map. Each point is either a floating point number or NA. I load the data in with:   data <- read.

Re: [R] heatmap is producing unwanted horizontal and vertical lines?

also just tried the image command and that was giving the same result as well.  What I'm wanting are blocks together without the white lines going through but just cant seem to find a way to do that? Best regards, Col. From: Peter Morgan To: Colin Ford Se

Re: [R] heatmap is producing unwanted horizontal and vertical lines?

Yes that sounds very much like it. I'm using R 13.1 on Windows 7 32 bit. I did do a search but didn't find anything - probably not using the correct search terms. Glad its not just me.  Thank you, Col. From: Michael Sumner Cc: Peter Morgan ; "r-help@r-project