I want to call a msgbox using pushbutton. How can I do it given I am not using guide?

Question

Atul Vaibhav 2016-7-13

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https://ww2.mathworks.cn/matlabcentral/answers/295411-i-want-to-call-a-msgbox-using-pushbutton-how-can-i-do-it-given-i-am-not-using-guide

回答： Walter Roberson 2016-7-13

I have created a pushbutton in which I want the msgbox to be called on & display four values when the button is pushed. I have tried the following but It's showing error.

S.btn5 = uicontrol('style','pushbutton','units','pixels',...
'position',[c a-70 170 50],'fontsize',14,'string','Calculate', ...
     'callback', 'x=linprog(f,A,b,Aeq,beq); z=abs(transpose(f)*x);msgbox({['Source 1 =' num2str(x(1))],['Source 2 = 'num2str(x(2))],['Source 3 =' num2str(x(3))],['Output =' num2str(z)]});');

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Answer 1

Walter Roberson 2016-7-13

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Even though you are not using GUIDE, I recommend that you put the callback code into a function and invoke the function in the callback.

When you code a callback as a string (the way you have) the variables are fetched from the base workspace.

One difficulty that you have is that you are trying to put quote marks inside of quote marks. To do that you need to double the inside quote marks. For example,

'callback', 'msgbox(''hello!'');'