Do you have a suggestion for a name of my function?

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Jos (10584) 2016-3-22

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评论： Stephen23 2016-3-31

I have written a nice little function which I would like to put on the File Exchange. However, I am still looking for a short and decent name for it. So I thought to ask here, for inspiration.

The function takes a vector that can contain consecutive identical elements. It returns an index vector that (re-)starts counting from 1 whenever V changes. An example

V = [10 10 10  4  4 10  9  9  9  9  9]
% and a call to MyFunction(V) returns
    [ 1  2  3  1  2  1  1  2  3  4  5]

Any suggestions are welcome!

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John D'Errico 2016-3-22

编辑：John D'Errico 2016-3-22

This is sometimes the hardest part of writing a function - what to call it. You want a memorable name, since the user needs to be able to use it, and this helps improve user code readability. A short name would be nice of course. Unused is important too.

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Answer 1

Charles Dunn 2016-3-22

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This is similar to Run Length Coding (https://en.wikipedia.org/wiki/Run-length_encoding). You could call it RunLengthCounter

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Jos (10584) 2016-3-24

Alas, no option to accept several answers, but this put me on the track of runs.

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Answer 2

Walter Roberson 2016-3-23

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"BoatyMcBoatFace" (Google it if you missed this current event ;-) )

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Answer 3

Stephen23 2016-3-22

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编辑：Stephen23 2016-3-23

在 MATLAB Online 中打开

Nice idea, sometimes I have needed an efficient tool to do exactly that!

Is there any similar inbuilt function? There seems the be little precedent for the name.

The term "run" is commonly used to describe contiguous sequences of one value (e.g. RLE). I find count alone is a little bit misleading, as the function does not count the runs themselves, rather the elements within each run.... however adding the prefix "re" makes it clear that this is no ordinary run counter:

runrecount

The "shape" of the output also implies some possible names: