Matlab Problem : Why after run the program, workspace or import data is disappeared ?

Hello everyone , thanks a lot for any help to fix this problem.

i have one problom in my program , Why after run the program, workspace or import data is disappeared ? - what is the problem ?

this is my dataset file : https://s19.picofile.com/d/8435105100/41733346-5bc8-41e5-8982-4ceac2b44d05/letter_recognition.data

and this is my code :

clc;    
close all;  
clear;  
workspace;  
cvp=cvpartition(size(letterrecognition,1),'HoldOut',0.25);
alphatrain = letterrecognition(cvp.training,:);
alphatest = letterrecognition(cvp.test,:);

Input_Train = alphatrain(:,2:end);
Target_Train = alphatrain(:,1);

Input_Test = alphatest(:,2:end);
Output_Test = alphatest(:,1);

Input_Train = Input_Train';
Target_Train = Target_Train';
Input_Test = Input_Test';

net = feedforwardnet(15);
net = train(net,Input_Train,Target_Train);
y = net(Input_Test);
M_Target_Test = y';

[Jan]

What does when disappear? Maybe you mean the effect of the clear command?

[arash Moha]

Yes, I deleted the clear command code line , The problem was solved , Thank you very much .

Answer 1

[Jan]

[After the comment has solved the problem, moved to the section for answers]

Remove the clear command, which is responsible for clearing the workspace.

Clearing variables is hardly useful in Matlab. Prefer to use functions instead of scripts to keep the workspace clean.