I don't know why 'mean' function couldn't run with 'double'

I want to use 'mean' function in a code, but it results the error:Undefined function 'mean' for input arguments of type 'double'.

So I checked the funtion with the example on matlab website (https://www.mathworks.com/help/matlab/ref/mean.html)

>> A = [0 1 1; 2 3 2; 1 3 2; 4 2 2]

A =

0 1 1

2 3 2

1 3 2

4 2 2

>> a=mean(A)

Undefined function 'mean' for input arguments of type 'double'.

It shows the same error message, even I use the example on Matlab website.

I don't know what's wrong with it..

Answer 1

[madhan ravi]

Maybe the case that you have a file named mean.m if so change it's name or delete it .

which mean -all % what shows up?

[madhan ravi]

Jiyeon Kim's answer moved here for consistency:

C:\Program Files\MATLAB\R2018b\toolbox\matlab\timefun\@datetime\mean.m          % datetime method
C:\Program Files\MATLAB\R2018b\toolbox\matlab\timefun\@duration\mean.m          % duration method
C:\Program Files\MATLAB\R2018b\toolbox\matlab\bigdata\@tall\mean.m              % tall method
C:\Program Files\MATLAB\R2018b\toolbox\distcomp\parallel\@codistributed\mean.m  % codistributed method
C:\Program Files\MATLAB\R2018b\toolbox\distcomp\gpu\@gpuArray\mean.m            % gpuArray method
C:\Program Files\MATLAB\R2018b\toolbox\matlab\timeseries\@timeseries\mean.m     % timeseries method

These functions showed up ,,, but ,,can I change name of it or delete it?

[madhan ravi]

Don't change anything they are inbuilt functions.

You are missing this file though which you really need:

/Applications/MATLAB_R2018b.app/toolbox/matlab/datafun/mean.m

[Jiyeon Kim]

Can u tell me where I can get the function?

[madhan ravi]

It's better you contact the mathworks support team by clicking the Contact Us button on the top right corner of this page , they will definitely help you out.

[Stephen23]

First you should check your Search Path, as it might just be that someone/something has changed the Search Path and so MATLAB simply cannot find that function, even if if exists in your MATLAB installation.

[Jiyeon Kim]

Okay Thank you so much :)

[madhan ravi]

Anytime :)