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Writing 2 vectors within matrix

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Miguel Cardoso
Miguel Cardoso on 19 Feb 2020
Commented: Miguel Cardoso on 19 Feb 2020
Hi!
I have 2 vectores I where are written the indexes of a matrix M and J which are the values that I want to write on matrix M. Bellow I give a generic example, how can I do it automatically?
I=[1 1 1 2 2 2 3 3 3];
J=[2 4 7 3 1 4 9 6 4];
M=[2 4 7; 3 1 4; 9 6 4];
Hope you can help me!

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Answers (1)

fred  ssemwogerere
fred ssemwogerere on 19 Feb 2020
Hello, use reshape
M=reshape(J,[3,3])';

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