Problem with variable 'nanmean'.

Hello

In my matlab script I was using 2 function scripts for despiking the data without any problem but nos I have problem with these functions and I get the error

Unrecognized function or variable 'nanmean'.

How can I solve it ?

This is my code and I also attach the func_despike_phasespace3d( ur(:,np),8, 2) data here.

the only different thing is that I am using a different version of matlab 2022b now.

clear,
close all;
clc;
%% Clear Water Mean (Q1S1)
% >>>>> 1mm VectrinoData.342.22.Vectrino Profiler.00000
% >>>>> 2mm VectrinoData.325.22.Vectrino Profiler.00000
% >>>>> 3mm VectrinoData.340.22.Vectrino Profiler.00000

%% 1mm (Sand A) here load the clear water data 
load('VectrinoData.342.22.Vectrino Profiler.00000.mat')
ur=Data.Profiles_VelX;
vr=Data.Profiles_VelY;
w1r=Data.Profiles_VelZ1;
w2r=Data.Profiles_VelZ2;
k=length(Data.Profiles_TimeStamp);
% z=0.029:-0.002:0; % Starts from 
% z=0:0.002:0.029; % Starts from 
Q1S1_1mm=zeros(11,15);
for np=1:15
    [u(:,np),ip1] = func_despike_phasespace3d( ur(:,np),8, 2);
    [v(:,np), ip2] = func_despike_phasespace3d( vr(:,np),8, 2);
    [w1(:,np), ip3] = func_despike_phasespace3d( w1r(:,np), 8, 2);
    [w2(:,np), ip4] = func_despike_phasespace3d( w2r(:,np), 8, 2);
    w(:,np)=(w1(:,np)+w2(:,np))/2;
    Q1S1_1mm(1,np)=0.08-0.0450-(0.002*np);
    Q1S1_1mm(2,np)=mean(u(:,np));
    Q1S1_1mm(3,np)=mean(v(:,np));
    Q1S1_1mm(4,np)=mean(w(:,np));
    Q1S1_1mm(5,np)=std(u(:,np));
    Q1S1_1mm(6,np)=std(v(:,np));
    Q1S1_1mm(7,np)=std(w(:,np));
    Q1S1_1mm(8,np)=0.5*( (var(u(:,np))) + var((v(:,np))) + var ((w(:,np))) ); %TKE
    Q1S1_1mm(9,np)=mean( (u(:,np)-mean(u(:,np))).* (v(:,np)-mean(v(:,np))) ); %Reynolds shear stress u'v'
    Q1S1_1mm(10,np)=mean(  (u(:,np)-mean(u(:,np))).*  (w(:,np)-mean(w(:,np))) ); %Reynolds shear stress u'w'
    Q1S1_1mm(11,np)=mean( (w(:,np)-mean(w(:,np))).* (v(:,np)-mean(v(:,np))) ); % Reynolds shear stress w'v'
end
Q1S1_1mm=sortrows(transpose(Q1S1_1mm)); 

Answer 1

[KSSV]

Use mean

mean(data,'omitnan')

[mehra]

where should I use that ? inside the func_deskpike code?

[KSSV]

Where ever you have used nanmean, replace them with the given line.

Answer 2

[Dyuman Joshi]

nanmean is a part of the "Statistics and Machine Learning Toolbox", which I believe you do not have and which is why you get the error. Additionally the use of nanmean() is not recommended (as you can see in the webpage linked).

Replace all instances of

nanmean(xyz)

with

mean(xyz, 'omitnan')

in both the functions.

[mehra]

so is it because ı have not installed it? actually I runned the following command to check (it was provided in answer to a question in mathworks)

license('test','Statistics_Toolbox')

and ans was 1.

so does it mean I have it?

And can I install it or ı should uninstall and install matlab again?

thanks

[Rik]

Why would you bother? Just do this replacement. It will take you a minute to do, and the error will disappear.

You can even do this (although I wouldn't recommend it):

x = nanmean([1 NaN 3])

x = 2

function varargout=nanmean(varargin)
varargout = cell(1,nargout);
[varargout{:}] = mean(varargin{:},'omitnan');
end