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Writing 2 vectors within matrix

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Miguel Cardoso
Miguel Cardoso 2020-2-19
关闭： MATLAB Answer Bot 2021-8-20
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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回答（1 个）

fred ssemwogerere
fred ssemwogerere 2020-2-19
Hello, use reshape
M=reshape(J,[3,3])';

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