MATLAB Answers

# How does nanstd function process complex numbers

11 views (last 30 days)
Luciano Junior on 24 Feb 2021
Answered: David Goodmanson on 25 Feb 2021
Hi, I would like to know how Matlab process nanstd of a complex matrix?
Let C be a complex matrix defined by C=A+Bj,
nanstd(C) returns a complex matrix with dimentions equal to C and real(nanstd(C)) is ~= nanstd(A)
I just dont understand how it is computed and I can not find the explanation on Matalabs documentation.
Thank you
##### 0 CommentsShowHide -1 older comments

Sign in to comment.

### Answers (1)

David Goodmanson on 25 Feb 2021
Hi Luciano
I'm not sure what you are referrng to with
" nanstd(C) returns a complex matrix with dimentions equal to C and real(nanstd(C)) is ~= nanstd(A) "
because nanstd(C) returns a row vector with the nanstd of each column calculated separately, and those nanstd values are real already. But it is true that real(nanstd(C)) is ~= nanstd(A) because
nanstd(C) = abs( nanstd(A) + i*nanstd(B) )
##### 0 CommentsShowHide -1 older comments

Sign in to comment.

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!