How to combine two matrix and extract value from one matrix to another matrix in same position?

Question

ASHA PON 2022-3-20

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https://ww2.mathworks.cn/matlabcentral/answers/1676019-how-to-combine-two-matrix-and-extract-value-from-one-matrix-to-another-matrix-in-same-position

评论： ASHA PON 2022-4-5

Repeated values in a matrix are assigned to a group and now the elements in group has to be matched with another matrix having probability values of element in group.

For example

a=[6 6 5 6 5 6 6]

group 1 =5

3 5

group 2 = 6

1 2 4 6 7

b = [0.74 0.66 0.58 0.47 0.62 0.75 0.76]

Expecting output:

group 1 = 5

0.58 0.62

group 2 = 6

0.74 0.66 0.47 0.75 0.76

Thank you in advance

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Answer 1

Voss 2022-3-20

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1676019-how-to-combine-two-matrix-and-extract-value-from-one-matrix-to-another-matrix-in-same-position#answer_922404

在 MATLAB Online 中打开

a = [6 6 5 6 5 6 6];
b = [0.74  0.66  0.58  0.47  0.62  0.75  0.76];
group_1 = 5;
group_2 = 6;
b(a == group_1)
ans = 1×2
    0.5800    0.6200
b(a == group_2)
ans = 1×5
    0.7400    0.6600    0.4700    0.7500    0.7600
% Expecting output:
% group 1 = 5
%    0.58  0.62
% group 2 = 6
%    0.74  0.66  0.47  0.75  0.76

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ASHA PON 2022-4-5

Thank you very much for the reply. Actually i just discussed the smaller version of my problem. I need to apply the above mentioned problem to a larger number of group and n*m matrix. Kindly suggest me the procedure to apply for larger matrix.

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