Matlab Gui Help request !!

Hello there, currently am working on a matlab assignment which require to make a graphical user interface "Which i upload snap of it", therefore i have to relate it with .m file. when it comes to matlab am quite new with this programming language and i have to submit my project soon, so i want how to 1. get numerical "only positive numbers" from the user if not then prompt a message tells him "the input is wrong, please input The right values". 2. how to plot 3 data having the same x axes on the same box so which syntax should i have to use. 3. in selection panel i made a switch loop i don't know whether it's right or wrong but i have 3 options i want to load stored inputs when the user click on any one of them so what to do there. 4.the reset button i want when someone press it to remove everything and start the program again so what to do there. Thanks in advance

Answer 1

[Adam]

You should probably ask questions in different threads when you have so many to ask. Asking 4 different questions at once means either someone has to answer all 4 or they can only give a semi-complete answer to your question which can't then really get accepted as the answer since it doesn't cover everything.

1. To get numerical positive numbers from an edit box

val = str2double( get( hEdit, 'String' ) );
if isnan( val ) || val < 0
   errordlg( 'Input must be a positive number' )
end

Obviously that is a very simple option, you can expand with extra arguments to errordlg or use a warndlg instead if you prefer, etc, etc

2. To plot data on the same axes just use

hold( hAxes, 'on' )

between your calls to plot.

3. I don't really know what your question is here. Do you not know how to load inputs (if so then you need to tell us where/what the inputs are to be loaded) or do you not know how to get the options from the popup list in your switch statement?

4. There are a few ways to do this. Personally I would probably have a function that resets everything in the UI back to default state, but simpler is probably something like:

closereq;
MyGUIName;

where MyGUIName is whatever the name is of your GUI that you use to launch it in the first place. Closing and reopening a UI just to reset it is not a very elegant user solution, but it is the one you asked for.