Reverse concatenation: separate a data array along a specified dimension.

Version 1.1.0.0 (1.62 KB) by DS
INVERSE_CAT splits a given data array into sub-arrays along the specified dimension.
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Updated 10 Apr 2012

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[A B]=INVERSE_CAT(DIM,C) splits array C along dimension, DIM, returning sub-arrays A and B.

Examples:
M = [1 2 3; 4 5 6; 7 8 9];
C = cat(2,M,M)
[A B] = inverse_cat(2,C) ... returns A=M and B=M
[A B] = inverse_cat(1,rot90(C)) ... returns A=rot90(M) B=rot90(M)
[A B] = inverse_cat(3,cat(3,M,M)) ... returns A=M and B=M

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Note: There are certainly more efficient ways to separate concatenated data. Suggestions for improvement are much appreciated.

*Thanks to Jan Simon for insightful comments.

Cite As

DS (2024). Reverse concatenation: separate a data array along a specified dimension. (https://www.mathworks.com/matlabcentral/fileexchange/36097-reverse-concatenation-separate-a-data-array-along-a-specified-dimension), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2007b
Compatible with any release
Platform Compatibility
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Version Published Release Notes
1.1.0.0

Added Jan Simon's method to handle dimensions > 3.

1.0.0.0