GUIDE - using the data of a Textbox to use it in other functions in the main

I want to use the variable minVelocity in my main. the variable will me entered in the textbox of my gui after I press execute it will be saved.

But I can not use it in my main it does not work.

Answer 1

[Image Analyst]

Just call this code to get minVelocity whenever you need it

minVelocity = str2double(handles.minVelocity.String);

The function will have to have access to the handles structure, which all GUI component callbacks will have.

See the FAQ for more options.

[Megan]

Then i get this error:

Undefined variable "handles" or class "handles.minVelocity.String".

[Image Analyst]

Sorry, should be minVelocity_text

minVelocity = str2double(handles.minVelocity_text.String);

[Megan]

Nothing changed. I get this error msg

Undefined variable "handles" or class "handles.minVelocity_text.String".

Error in Analysis_Main (line 15)

minVelocity = str2double(handles.minVelocity_text.String);

[Image Analyst]

Your Analysis_Main function does not have access to handles unless you pass it in, because it's not a callback function. So you need to call it like this:

handles = Analysis_Main(handles);

[Megan]

I dont get it. I tried to do this but it didnt work. Where should i put this code snippet

[Image Analyst]

Replace this

% --- Executes on button press in execute_button.
function execute_button_Callback(hObject, eventdata, handles)
minVelocity = str2double(get(handles.minVelocity_text, 'string'));
% Store the data in the "UserData" property of the GUI Figure
% This assumes that the hObject is a child of the GUI figure
data.minVelocity = minVelocity;
hObject.Parent.UserData = data;
disp(minVelocity)
Analysis_Main

with this

% --- Executes on button press in execute_button.
function execute_button_Callback(hObject, eventdata, handles)
minVelocity = str2double(get(handles.minVelocity_text, 'string'));
% Store the data in the "UserData" property of the GUI Figure
% This assumes that the hObject is a child of the GUI figure
data.minVelocity = minVelocity;
hObject.Parent.UserData = data;
disp(minVelocity)
handles = Analysis_Main(handles);