How to make any math operation when there are NaN in data serial?

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Carlos Batista
Carlos Batista 2014-7-13
评论： Carlos Batista 2014-7-14
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?
  2 个评论
Carlos Batista
Carlos Batista 2014-7-13
Can be any value!!!
For exemplo: can be these 2 matrix!
a=[0,-10,3,-100]
b=[-1,-2, NaN, -0]
Only want learn as to do!
This model don't I understood
Thanks!
Carlos

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Image Analyst
Image Analyst 2014-7-13
编辑：Image Analyst 2014-7-13
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
Image Analyst 2014-7-13
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.
Carlos Batista
Carlos Batista 2014-7-14
First step I did!!!!
Now, I need to help for know as remove the NaN when I have a matrix as more than 1 dimension (...)
For exemplo
a = 10x8x2,
where, 10 is latitude, 8 longitude and 2 time (...)
I need that there are withdrawal these NaN in a matrix com 3D

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