
I am a beginner and this is a naive question.
I have the following data set.
row column height
1 2 96
3 7 67
9 25 77
......
I have a matrix of 50*100 data points and about 60% of them are zeros.
I want to put the height data into the matrix according to their row and column numbers. does anybody have experience in setting up such matrix? 
Your help is highly appreciated.
Jack
LSU
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