How to make any math operation when there are NaN in data serial?
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How to make any math operation when there are NaN in data serial?
I'd like to make an test using in my data serial NaN...
For exemplo: I have 2 matrix (a and b) and I'd like of sum them!!!
Ex:
a=[1,2,3,NaN,5]
b=[1,2,3,8,5]
c=(a+b)
How can I to do?
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Image Analyst
2014년 7월 13일
편집: Image Analyst
2014년 7월 13일
Try these two different approaches:
a=[1,2,3,NaN,5]
b=[1,2,3,8,5]
cWithNans = a + b % c(4) will = nan
nonNanLocations = ~isnan(cWithNans) % Location of indexes that are good.
cwithoutNans = cWithNans(nonNanLocations)
% c(4) is skipped and new c(4) = old c(5)
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Image Analyst
2014년 7월 13일
isnan() is a function that is the same length as the array that you pass it. It will be true or 1 where there is a nan in the array, and false or 0 where there is a good number. You can pass that in to the array as an index to extract all the elements of the array that are, or are not, nans.
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