I want to plot RMSE from mat file but it gives error

When I run the m file, it gives me he following error:

Operator '-' is not supported for operands of type 'cell'.

Error in RMSE_Plot (line 5)

MSE = mean((u-two).^2,2);

>>

Answer 1

[Star Strider]

One option is to use the cellfun function (keeping ‘two’ as a cell array). The other option is to use the cell2mat function to convert ‘two’ to a numeric array.

I use cellfun here —

clear;clc

LD = load('3sn_Varying.mat');
u = LD.u;
two = LD.two;

[m,n] = size(two); 
MSE = cellfun(@(x)mean((u-x).^2,2), two);
RMSE = sqrt(MSE);

%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Arrange in descending order
%%%%%%%%%%%%%%%%%%%%%%%%%%%
MSE=sort(MSE,'descend');
RMSE=sort(RMSE,'descend');

bestRMSE=min(RMSE)

bestRMSE = 6.5125e-05

%%%%%%%%%%%%%%%%%%%%
% Plotting RMSE
%%%%%%%%%%%%%%%%%%%%
figure
x=1:m;
semilogy(x,RMSE,'linewidth',2);
xlabel('\bf Independent Runs')
ylabel('\bf RMSE')
title('\bf RMSE vs Runs');

.

[Sadiq Akbar]

@Star Strider

Thanks a lot. Each time your explanation clears everything to me.

[Star Strider]

As always, my pleasure!

I very much appreciate your compliment!