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

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?

[Image Analyst]

What value do you want for c(4)?

[Carlos Batista]

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

Answer 1

[Image Analyst]

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)

[Carlos Batista]

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

[Image Analyst]

What "model" do you not understand? Why did you accept the answer if you don't understand? Even after your comment, my answer stays the same.

[Carlos Batista]

I don't understood the logical used for to make the NaN same present in my serial not to make part of my calculation!

Sorry, I'm very new as user of Matlab!!!

Thanks

[Image Analyst]

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]

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