Asign data with index or something...

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Gimpy
Gimpy 2014-8-21
回答： Sean de Wolski 2014-8-21
Hi, I have the following inputs:
row=[3,7,10]
col=[1,2,3]
data=rand(1,3)
data =
0.91 0.63 0.10
matrix=zeros(3,3)
And I want to replace the following row in matrix: row 3, coll 7 by 0.81 instead of 0
row 7, coll 2 by 0.63 instead of 0
row 10, coll 3 by 0.1 instead of 0
Any idea?
PS: wihtout loop and the real matrix a much more biger and it need to be dynamic the answer.
Thank you!

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采纳的回答

Sean de Wolski
Sean de Wolski 2014-8-21
You've defined matrix to be a 3x3 but want to reference the 7th and 10th row. How big should it be?
If you just want it to be "big enough"
M = zeros(max(row),max(col));
M(sub2ind(size(M),row,col)) = data

更多回答（1 个）

Matt J
Matt J 2014-8-21
matrix = sparse(row,col,data)

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