Separating a matrix into two matrices based on a value of one of the columns.

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Thomas 2013-2-28

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https://ww2.mathworks.cn/matlabcentral/answers/65281-separating-a-matrix-into-two-matrices-based-on-a-value-of-one-of-the-columns

So I have a matrix like such

Data2 =

and I want to separate the matrix into two different matrices based on the 4th column. I want to have two separate matrices where one has only rows with a number above zero in column 4 and the other has only values with zero in column 4. I am also set with the stipulations that I cannot use If statements. any ideas?

Thank you for your time.

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Answer 1

Andrei Bobrov 2013-2-28

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https://ww2.mathworks.cn/matlabcentral/answers/65281-separating-a-matrix-into-two-matrices-based-on-a-value-of-one-of-the-columns#answer_76814

编辑：Andrei Bobrov 2013-2-28

在 MATLAB Online 中打开

p = data(:,4) > 0; % here 'data' - your array
out = {data(p,:), data(~p,:)};

if there is a negative value, then

out = {data(data(:,4) > 0,:), data(data(:,4) == 0,:)};

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Thomas 2013-2-28

编辑：Thomas 2013-2-28

I after I use this it creates another vector named out that references two separate areas of my first peace of data. After i click on the matrix and it brings up a table it shows two different things. One is 46x6 double in the area 1,1 on my table while the other is 4x6 double in the area 2,1. Is there a way to make it so I can set those values to show up like a normal matrix would after clicking on it?

Thomas 2013-2-28