How do I save a workspace data to a specific directory.

I want to save the mean image matrix(Back_m) into a following folder 'C:\Users\YJ\Desktop\matlab' Here is what I did

clc;
clear;
back_path = 'F:\Thesis data\sample\datachris\Intensifier_Off\';
back_files = dir([back_path '*.im7']);
n_back=length(back_files);
n_im=length(back_files);
A1 = readimx([back_path back_files(1).name]);
% All_back_data = zeros(A1.Nx,A1.Ny*A1.Nf,n_im);
All_back_data = zeros(A1.Nx,A1.Ny*A1.Nf,n_im);
for i = 1:n_im
temp = readimx([back_path back_files(i).name]);
All_back_data(:,:,i) = double(temp.Data);
end
Back_m = mean(All_back_data);
figure;imshow(temp.Data(:,1:768),[]);colormap jet;colorbar

savdir = 'C:\Users\YJ\Desktop\matlab\';
save(fullfile(savdir,Back_m),'backmean');

And I get the following result:

Error using fullfile (line 59) Char inputs with multiple rows are not supported.

Answer 1

[Guillaume]

You got confused over the name of the file and the name of the variable, it should be:

save(fullfile(savedir, 'backmean'), 'Back_m'); %maybe also add extension to backmean