Create a new array everytime with the change of sign in an array

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Sri Vishnu Katreddi 2022-4-29

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1707945-create-a-new-array-everytime-with-the-change-of-sign-in-an-array

编辑： Matt J 2022-4-29

I have an array A = [0 1 2 3 2 1 0 -1 -2 -2 -1 0 1 1.6 1.8 2 1 0 .... ], Now I want to create a new array everytime the sign changes in the array, it should look like

B = [0 1 2 3 2 1 0]

C = [-1 -2 -2 -1]

D = [0 1 1.6 1.8 2 1 0]

.

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Walter Roberson 2022-4-29

Why should it look like that? sign(0) is not the same as sign(1) . Why are you including 0 in the run of positives? Why does the 0 not get included with the run of negatives?

Sri Vishnu Katreddi 2022-4-29

编辑：Sri Vishnu Katreddi 2022-4-29

0 can either take run of positives or run of negatives, In fact I am trying to create based on the negative sign.

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Answer 1

Matt J 2022-4-29

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1707945-create-a-new-array-everytime-with-the-change-of-sign-in-an-array#answer_953580

编辑：Matt J 2022-4-29

在 MATLAB Online 中打开

Download these files,

https://www.mathworks.com/matlabcentral/fileexchange/78008-tools-for-processing-consecutive-repetitions-in-vectors

and then do like in the following:

 A = [0 1 2 3 2 1 0 -1 -2 -2 -1 0 1 1.6 1.8 2 1 0];
 G=groupConsec(A>=0);
 output=groupFcn(@(x) {x}, A ,G); %return the groups as cell array elements, 
                                  %not separate variables