I have matlab 2013b and all of a sudden the following code for median with omitnan does not work. Can anyone help troubleshoot?

A = [1.77 -0.005 3.98 -2.95 NaN 0.34 NaN 0.19]; M = median(A,'omitnan')

M =

    1.7700   -0.0050    3.9800   -2.9500       NaN    0.3400       NaN    0.1900

Answer 1

[Star Strider]

Use ‘logical indexing’ and the isnan function (as ~isnan):

A = [1.77 -0.005 3.98 -2.95 NaN 0.34 NaN 0.19];
M_omitnan = median(A, 'omitnan')
M_notisnan = median(A(~isnan(A)))

M_omitnan =
   0.265

M_notisnan =
   0.265

That it is ‘suddenly not working’ means that you could be ‘overshadowing’ it with a variable or usdr function named ‘median’. To determine that, run this line from your Command Window (or a script):

which median -all

You should only get returns on the ‘C:\Program Files\MATLAB\R2013b\toolbox\’ path. Anything else will reveal where the problem is.

Answer 2

[Fangjun Jiang]

You must be mistaken about the MATLAB version. The "nanflag" option for the median() function is only available for R2015a and later. See the document link below. Change the hyper link to R2015a to see the difference.

https://www.mathworks.com/help/releases/R2014b/matlab/ref/median.html?searchHighlight=median