Hi
I have 3 vectors, say g1, g2 and f, where g1 and g2 contain the row and column
indices of a matrix, with corresponding elements in f. How can I create a
matrix containing the values in f ?
For example:
g1 g2 f
3 4 10
2 1 30
4 4 50
How can then get a matrix that looks as follows:
0 0 0 0
30 0 0 0
0 0 0 10
0 0 0 50
I am still learning R. I think reshape will help, but it is not clear how that
works here.
Any help is much appreciated.
Thank you.
Jacob
Jacob L van Wyk
Department of Statistics
University of Johannesburg, APK
Box 524
Auckland Park 2006
South Africa
Office Tel: +27 11 559 3080
Fax: +27 11 559 2832
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