How to apply a diff to histogram object?

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fransec 2019-5-21

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评论： Star Strider 2019-5-27

采纳的回答： Star Strider

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Hi everybody,

I am trying to apply a difference to an histogram result, which is an object.

H=histogram(matrixvalues,bins);  
dH=[0,diff(H)];

but the result is

Undefined function 'diff' for input arguments of type 'matlab.graphics.chart.primitive.Histogram'.

This is because, I think, the H output is an histogram object and not a double.

With the older function hist there are no problems because the output is a double, but with histogram I can not.

Any advices?

Thanks a lot

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Star Strider 2019-5-21

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I have no idea what you wwant.

Try this:

dH = diff(H.BinCounts);

To se all the available fields, do this:

histogramFields = get(H)

The only (little) problem is that in this way I have to add one edge more (for example the egds vector is a 52-element long), in order to obtain a h.Values of the same length of that produced by older hist function. So my egds vector will start from negative value, for exampe.

Anyway, thanks!