plotting multiple variables in a listbox

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Melissa
Melissa on 18 Aug 2014
Commented: Melissa on 18 Aug 2014
Good Morning, I am trying to plot all variables selected in a listbox in a matlab gui. I seem to be overwriting the variables when plotting and only plotting the last one even when using the hold on command inside the loop. I also cannot figure out how to add a legend to the plot which corresponds to the variable selected in the listbox.
Any suggestions?
Thanks so much.
%Setting up string and value for desired parameters
Variable_Name = get(handles.Parameter_Listbox,'String');
Index = get(handles.Parameter_Listbox,'Value');
%Setting results plot
axes(handles.Plot)
%Creating loop for parameters choosen
for i=1:length(Index)
Parameter(:,i)=Data(:,Index(i))
end
[j,k]=size(Parameter);
for p=1:k
plot(Data(:,2),Parameter(:,k));
hold on
legend(Variable_Name(k));
hold on
end

Accepted Answer

Jan
Jan on 18 Aug 2014
You are plotting Data(:, 2) against Data(:, Index). Is this your intention?
What about this:
Variable_Name = get(handles.Parameter_Listbox,'String');
Index = get(handles.Parameter_Listbox,'Value');
plot(Data(:,2), Data(:, index).', 'Parent', handles.Plot);
legend(Variable_Name(index));
  4 Comments
Melissa
Melissa on 18 Aug 2014
Using your same logic I found a way so that the matrix was not empty:
pHandles = plot(Data(:,2), Data(:, Index).', 'Parent', handles.Plot);
legend(pHandles,Variable_Name(Index));
Thanks for all of your help.

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More Answers (1)

Michael Haderlein
Michael Haderlein on 18 Aug 2014
Edited: Michael Haderlein on 18 Aug 2014
You only plot the last Parameter, you need to change the line
plot(Data(:,2),Parameter(:,k));
to
plot(Data(:,2),Parameter(:,p));
The same with the legend, too.
  3 Comments
Michael Haderlein
Michael Haderlein on 18 Aug 2014
Anyway, Jan Simon's answer is better as he plots everything without the loop - just follow his answer.

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