Updating 'Base' workspace values using a GUI

2018 7 30
2 个回答
更新时间：2018 7 30
8 次查看（30 天）

0 个投票

Hi all,
I would like to update a set of values in my 'base' workspace via a GUI by getting a user to enter values into separate 'edit text' fields and once a button is clicked, all values are sent to the 'base' workspace and updated. I have tried inputdlg however this is very basic and I'd prefer if someone provided an example using uicontrol or GUIDE.
I don't mind doing this via GUIDE or programmatically, however I'm completely new to this so I'd love to see an example code that I can use which simply allows a user to enter a value, hit a button, and the value then updates in the 'base' workspace.
Please see the example of where I'd like to start via the image.

3 个评论
显示 1更早的评论 隐藏 1更早的评论

Stephen23
Stephen23 2018-7-30
编辑：Stephen23 2018-7-30
Original question:
https://www.mathworks.com/matlabcentral/answers/412362-updating-workspace-variables-using-guide
"... which simply allows a user to enter a value, hit a button, and the value then updates in the 'base' workspace."
Dynamically accessing variables in other workspaces is not recommended. It is much more reliable and more efficient to pass variables as input/output arguments.
https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval
Craig Saunders
Craig Saunders 2018-7-30
Thank you Stephen, however, regardless of this being recommended or not - would you kindly provide an example of how this could be done? The input dialog is basic and id prefer to design the GUI myself.
Cheers
Stephen23
Stephen23 2018-7-30
@Craig Saunders: the second link in my comment above has many examples.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（2 个）

Dennis
Dennis 2018-7-30

0 个投票

Here is an example how you can achieve what you asked for, however if you decribe what you want to do we probably come up with a better/safer/quicker solution.
tf=uicontrol('style','edit','position',[100,20,100,20]);
button=uicontrol('style','pushbutton','callback',{@badidea,tf});
function badidea(~,~,tf)
A=tf.String;
evalin('base',strcat('A=',A))
end

6 个评论
显示 4更早的评论 隐藏 4更早的评论

Craig Saunders
Craig Saunders 2018-7-30
Thanks Dennis, however this code does not successfully run in 2016a.
Dennis
Dennis 2018-7-30
try to save the function as seperate .m file. I am not sure when Matlab introduced dot notation, this should work with older versions:
function badidea(~,~,tf)
A=get(tf,'String');
evalin('base',strcat('A=',A))
end
Craig Saunders
Craig Saunders 2018-7-30
This unfortunately still doesn't run, Dennis
Craig
Dennis
Dennis 2018-7-30
You get some kind of error message?
Craig Saunders
Craig Saunders 2018-7-30
'Function definitions are not permitted in this context'.
Dennis
Dennis 2018-7-30
You are copy & pasting everything in command line? Either save and run it as script or save the function as badidea.m and run the other 2 lines.

请先登录，再进行评论。

Image Analyst
Image Analyst 2018-7-30

0 个投票

I agree with Stephen that it's not recommended. There are ways to share data. See the FAQ: https://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F

1 个评论
显示 -1更早的评论 隐藏 -1更早的评论

Craig Saunders
Craig Saunders 2018-7-30
Thanks for your response. My main task is to change values stored in the base workspace which are linked to a Simulink model. I want to run the Simulink model and update the values in order to show a difference within the simulation. Ideally I'd like the values to be adjusted using a slider which would demonstrate these differences.
Craig

请先登录，再进行评论。

类别

在 帮助中心 和 File Exchange 中查找有关 Scripts 的更多信息

产品

版本

R2016a

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by