move data in randomly

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Takim Mustakim 2021-9-7

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1448709-move-data-in-randomly

评论： Takim Mustakim 2021-9-8

suppose I have a 1 x 10 matrix : [ 1 3 2 5 4 7 6 9 8 0] and want to move it to A and B how to randomly move the dataset by generating output percentages of 60 A and 40 B.

Example output : A : [ 1 2 5 7 8 0 ] and B : [ 3 4 6 9 ]

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Answer 1

Image Analyst 2021-9-8

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1448709-move-data-in-randomly#answer_782889

在 MATLAB Online 中打开

See this well commented solution:

% Create sample data.
v = [ 1 3 2 5 4 7 6 9 8 0] 
% Find out how many values we need to send to A.
numIndexes = round(0.6 * length(v))
% Get random indexes.
AIndexes = randperm(length(v), numIndexes);
% Extract those indexes from v and put them into a new vector called A
A = v(AIndexes)
% Whatever is in v that is not already in A, put those into B using setdiff()
B = setdiff(v, A)