how get value from edit textbox gui matlab

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Unkown 2021-4-8

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https://ww2.mathworks.cn/matlabcentral/answers/795852-how-get-value-from-edit-textbox-gui-matlab

评论： DGM 2021-4-8

hello,

How can i get value from another edit textbox and use this value again to perform some calculation.

For example, this value is obtain from the graph

set(handles.kp,'String',num2str(sysP1D.Kp));

i want to use this value to perform another calculation.

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Answer 1

DGM 2021-4-8

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在 MATLAB Online 中打开

If you know what editbox you're looking for in your handles object, you can just get its contents

myvariable=get(handles.myeditbox,'String');

If you you need numeric output, obviously use str2num() on it.

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Unkown 2021-4-8

k = set(handles.edit_kp,'String',num2str(sysP1D.Kp));

tau = set(handles.edit_tp1,'String',num2str(sysP1D.Tp1));

d = set(handles.edit_thetap,'String',num2str(sysP1D.Td));

s = tf('s');

K1 = k; D1 = d; tau1 = tau;

G = K1*exp(-D1*s)/(tau1*s+1);

KP = num2str(get(handles.K,'String'));

KI = num2str(get(handles.I,'String'));

KD = num2str(get(handles.D,'String'));

set_param('block/Gs','Denominator',get(handles.K1,'string'));

set_param('block/Gs','Numerator',get(handles.tau1,'string'));

sim('block');

however, after i did this. the value in the simulink doesnt change.

DGM 2021-4-8

Oh, you're trying to set simulink block parameters? I don't see that there's any obvious problem with the code you've shown, but I imagine that's not the entire story. If you've verified that the values you are getting from your edit box are being recieved and stored correctly in the intended variables, then I'd suggest you make a new question that specifically addresses the issue of getting simulink block parameters to update after being set programmatically.

It's been nearly 10 years since I did this sort of thing with simulink, and I imagine many things, including recommended practices, have changed.

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