plotting multiple variables in a listbox

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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
Jan
Jan on 18 Aug 2014
Please post a complete copy of the error message.
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
Edited: Michael Haderlein on 18 Aug 2014
Sorry, my comment on the legend was wrong. You overwrite the legend in every iteration. Put the legend command below the loop and write
legend(Variable_Name(Index))
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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