when i run matlab code this sentence appear?

when i run the code this sentence 'Undefined function or variable 'f'.' and this happens for all variable

• note : the workspace in the program is empty

how can i fixed the problem????

Answer 1

[Azzi Abdelmalek]

This message occurs when you use variables that are not defined. For example:

y=5*t

How Matlab will calculate 5*t if the variable t is not defined. the correct code is for example

t=10
y=5*t

[Firas Al-Kharabsheh]

I defined it like that

    f=zeros(5,5);

the problem is when i run the code the variable does not appear in workspace

[Azzi Abdelmalek]

What variable? What code?

[Firas Al-Kharabsheh]

In matlab R2015b when i run code , the variable does not appear in workspace

[Walter Roberson]

If you had that line in a function, then the variable would be removed from the workspace as soon as that function returned.

Also, if you have a "clear" then you might be destroying the values. You should almost never have "clear all" in a program.

http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.3F

[Firas Al-Kharabsheh]

If i clear the variable from workspace how can restore it ???