count number of occurences of character in string?

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Is there a function/method for counting the number of times a specific character occurs in a string? Say
v = '30.44.532.56';
This is obviously nonesense, but I would like to check how many times the decimal point occurs so that I can reject if used with a function I wrote. This value would be input into GUIDE gui I am creating, so this is why it's in string format.

Answers (3)

Dharanee dharan Mani
Dharanee dharan Mani on 3 May 2020
Try using
countnum= count(v,'.');

Leor Greenberger
Leor Greenberger on 25 Sep 2011
I suppose this will actually work.
v = '30.44.532.56';
length(strfind(v,'.'))

Image Analyst
Image Analyst on 25 Sep 2011
numberOfDots = length(find(v=='.'))

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