Keep existing subplots while running code multiple times
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Subhasish Sutradhar
on 23 Jan 2020
Commented: Mohammad Sami
on 4 Feb 2020
Hello,
I have written a code which calculates certain parameters and plots several subplots in a figure as follows:
figure('name','my_title');
h1=subplot(2,2,1);
plot (x1,y1);
h1=subplot(2,2,2);
plot(x2,y2);
h1=subplot(2,2,3);
plot(x3,y3);
h1=subplot(2,2,4);
plot(x4,y4);
Now I have to run the same code multile times for differnet data sets. I would like to keep the existing subplots (from lets say data set 1) and plot the new subplots (from lets say data set 2) on top of the existing subplots for comparison. But everytime I try to do it, its erasing the existing subplots and only plotting the current data set.
I tried to use findobj to check whether the figure exists and if so then use it as follows:
fOp.figName='my_title';
hf=findobj('Type','figure');
if ~isempty(hf)
figure(hf);hold all;
else
hf = figure('Name',fOp.figName);
hold all;
end
h1=subplot(2,2,1);
hold all;
plot (x1,y1);
h1=subplot(2,2,2);
hold all;
plot(x2,y2);
h1=subplot(2,2,3);
hold all;
plot(x3,y3);
h1=subplot(2,2,4);
hold all;
plot(x4,y4);
While it keeps the figure 1 open for the multiple runs, but it still erases the previous subplots inside the figure 1. I think I have to use 'Children' function in some way but not sure how. Any help would be much appreciated. Thank you.
3 Comments
Rik
on 24 Jan 2020
@Mohammad you should post your comment as an answer. When doing so you should probably elaborate on your suggestion of using an explicit axes handle in the plot call.
Accepted Answer
Mohammad Sami
on 25 Jan 2020
Edited: Mohammad Sami
on 25 Jan 2020
You can change your code as follows.
fOp.figName='my_title';
hf = findobj('Type','figure','Name',fOp.figName);
if ~isempty(hf)
% get the handles if the figure already exist
hf = figure(hf);
h1 = hf.Children(4); % subplot 221
h2 = hf.Children(3); % subplot 222
h3 = hf.Children(2); % subplot 223
h4 = hf.Children(1); % subplot 224
else
% create figure and subplots if the figure does not exist
hf = figure('Name',fOp.figName);
h1=subplot(2,2,1);
h2=subplot(2,2,2);
h3=subplot(2,2,3);
h4=subplot(2,2,4);
end
hold(h1,'on');
plot(h1,x1,y1);
hold(h2,'on');
plot(h2,x2,y2);
hold(h3,'on');
plot(h3,x3,y3);
hold(h4,'on');
plot(h4,x4,y4);
6 Comments
Mohammad Sami
on 4 Feb 2020
You can specify the legend in the plot command lgdtxt = 'data1'; plot(h1,x1,y1,'DisplayName',lgdtxt);
Then finally at the end just call the legend. It will use the display name property to create the legends
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