How do i obtain a matrix from a gui table to multiply it to another matrix?

I want to enter a matrix through a table and multiply it with another matrix.I am using GUIDE.

now update is a pushbutton

function update_Callback(hObject, eventdata, handles)

global tableData;

tableData = get(handles.vi, 'Data');
*
now vi is the tag of the table*

function pushbutton2_Callback(hObject, eventdata, handles)

a = str2num(tableData);

a = a*r;

set(handles.test,'String',a);

guidata(hObject, handles);

* **now test is a static text.

Here the problem is that MATLAB says tableData is undefined.** *

Please some one help me out with this.

Answer 1

[Amit]

that's because tableData is undefined in pushbutton2_callback.

add global tableData; before a = str2num(tableData). this will make tableData accessible in that function.

[Soumyadeep]

so now is tableData a matrix?

Answer 2

[Image Analyst]

You need to get tableData again in that other callback:

tableData = get(handles.vi, 'Data');

This is safest because if you just make it global, you don't know if those functions, for example update_Callback() has been called yet. Plus, your user might interactively change the table data and that won't be reflected in the tableData global variable unless you've called get() after that and it was declared global in the function where you called the get().

Answer 3

[Soumyadeep]

so now is tableData a matrix?