Index 1 Variable by another

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Hillaryfor2016 2015-4-12

评论： Star Strider 2015-4-12

Hi there!

I have 2 variables

if true
A = 1
    2
    NaN
    4
end
B= 20
   2
   5
   4
end

I want to remove the '5' from variable B by replacing it with a NaN (i.e. any NaN's in variable A result in a NaN in variable B

I understand this is a simple problem. I have researched but its been a long day Please help x

Star Strider 2015-4-12

Use ‘logical indexing’:

B(isnan(A)) = NaN

produces:

Hillaryfor2016 2015-4-12

Worked beautifully, thanks for the help!! x

Star Strider 2015-4-12

My pleasure!

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