nansum alternative coding for operations and plotting figures.
2 views (last 30 days)
Show older comments
Hello,
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.
Thanks.
2 Comments
Mike Hosea
on 19 Aug 2021
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 =
15
10
15
Answers (0)
See Also
Categories
Find more on NaNs in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!