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Accumulate Connected Components

version 1.0.0.0 (2.11 KB) by Wolfgang Schwanghart
Construct array with accumulation of connected components

1.3K Downloads

Updated 10 Sep 2008

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accumconncomps creates vectors by accumulating elements in one vector using the connected components in another vector of same size. Connected components are regarded as subsequent, identical elements in a vector.

Example:
Sum the values in val according to the connected components in cc.

cc = [1 1 2 1 1 1 3 3 3 4 2 2];
val = [2.3 1.2 5 3 2 5 3.2 4.5 2 ...
2.2 1.2 2.2];

[c,valnew] = accumconncomps(cc,val,@sum)

c = 1 2 1 3 4 2
valnew = 3.5 5.0 10.0 9.7 2.2 3.4

I know, the function is rather simple, but needed it several times and perhaps others do so as well. In case you have a better way to code it, or in case you have any suggestion for an improved help text, please let me know.

Cite As

Wolfgang Schwanghart (2021). Accumulate Connected Components (https://www.mathworks.com/matlabcentral/fileexchange/21397-accumulate-connected-components), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2007b
Compatible with any release
Platform Compatibility
Windows macOS Linux

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