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data2a
2007 Jul 24
2
x,y,z table to matrix with x as rows and y as columns
Hello all,
I am sure I am missing something obvious but I cannot find the
function I am looking for. I have a data frame with three columns: X,
Y and Z, with X and Y being grid coordinates and Z the value
associated with these coordinates. I want to transform this data
frame in a matrix of Z values, on the grid defined by X and Y (and,
as a plus, fill the X.Y combinations which do no