How to find fifth value after somewhere in a series OR the end of the series, whichever comes first?

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I have a set of data for which I want to find the minimum, then take a range from 5 values either side of this. I have done this using the following:

xrangemin=xdata(find(xdata==xdata(ydata==min(ydata))-5):find(xdata==xdata(ydata==min(ydata))+5));

This works, UNLESS the min(ydata) is within 5 values of either end of dataset, in which case it returns [](0x1).

Is there a way to say to matlab 'find the fifth value before\after this one OR the first/last one whichever you find first'?

Thanks very much

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Answer 1

Yona 2014-8-27

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you can add max from 1 and 5 before the min and the min from end and 5 after the min.

    xrangemin=xdata(max(1,find(xdata==xdata(ydata==min(ydata))-5)):min(end,find(xdata==xdata(ydata==min(ydata))+5));

Oli Scott 2014-8-27

Thanks, good idea;)