plotting multiple variables in a listbox

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Melissa
Melissa 2014-8-18
评论： Melissa 2014-8-18
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

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采纳的回答

Jan
Jan 2014-8-18
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));
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Jan
Jan 2014-8-18
Please post a complete copy of the error message.
Melissa
Melissa 2014-8-18
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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更多回答（1 个）

Michael Haderlein
Michael Haderlein 2014-8-18
编辑：Michael Haderlein 2014-8-18
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.
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Michael Haderlein
Michael Haderlein 2014-8-18
编辑：Michael Haderlein 2014-8-18
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 2014-8-18
Anyway, Jan Simon's answer is better as he plots everything without the loop - just follow his answer.

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