nansum alternative coding for operations and plotting figures.

조회 수: 2 (최근 30일)
Eric Escoto
Eric Escoto 2021년 8월 19일
댓글: Eric Escoto 2021년 8월 19일
I am reciving a message from MATLAB saying that 'nansum' use is not reccomended and to use 'sum' instead, with the appropriate code changes.
However, I have data that needs to be operated on (sum/difference/division/etc.) and at the same time this data needs to be plotted in figures.
Using '0's' in place of NAN is fine for operating on, but when I use '0' for plotting, MATLAB thinks '0' is a value and fills in with color. The only way I've ever found it possible to plot '0' values as empty is by using 'NAN's'.
I am specifically using the 'patch' function to plot my data.
Just wondering if there is someone out there that can offer coding changes to agree more with MATLAB reccomendations.
  댓글 수: 2
Mike Hosea
Mike Hosea 2021년 8월 19일
Are you saying that if you could use nansum, you wouldn't have a problem? With SUM you do not need to convert NaNs to zeros. You just add the 'omitnan' flag to your sum call.
>> x = magic(3)
x =
8 1 6
3 5 7
4 9 2
>> x(2,2) = nan
x =
8 1 6
3 NaN 7
4 9 2
>> sum(x,1,'omitnan')
ans =
15 10 15
>> sum(x,2,'omitnan')
ans =
Eric Escoto
Eric Escoto 2021년 8월 19일
Hi Mike,
I used the 'omitnan' flag in my scripts and it works out.

댓글을 달려면 로그인하십시오.

답변 (0개)


Help CenterFile Exchange에서 Programming에 대해 자세히 알아보기




Community Treasure Hunt

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

Start Hunting!

Translated by