# Plotting Matrix points: 2

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B_Richardson on 20 Jul 2011
Given a matrix:
B
ans =
30.7805 28.7527 25.7110 23.6832 19.6268 17.5949 14.5547 11.5147 8.4725 5.4313
29.7667 27.7333 24.6923 21.6549 18.6114 15.5708 12.5285 9.4806 7.4582 4.4159
B.'
ans =
30.7805 29.7667
28.7527 27.7333
25.7110 24.6923
23.6832 21.6549
19.6268 18.6114
17.5949 15.5708
14.5547 12.5285
11.5147 9.4806
8.4725 7.4582
5.4313 4.4159
I am trying to plot the data as shown in this image:
I am trying to plot the 1st column as the orange points and the 2nd column as the blue points. The time between the points form a small box. The only axes I'm interested in is the X which will be composed of the overall time of the video. I am attempting to do this in a GUIDE axes. Eventually I want the user to be able to select the points and add labels.
Any advice in accomplishing this will be greatly appreciated!

Paulo Silva on 20 Jul 2011
a =[30.7805 29.7667
28.7527 27.7333
25.7110 24.6923
23.6832 21.6549
19.6268 18.6114
17.5949 15.5708
14.5547 12.5285
11.5147 9.4806
8.4725 7.4582
5.4313 4.4159]
axis([0,max(a(:))+max(a(:))/5,0,2])
hold on
plot(a(:,1),1,'pb')
plot(a(:,2),1,'pr')
h=0.02;y=1;
arrayfun(@(n)rectangle('EdgeColor','y','Position',...
[min([a(n,1) a(n,2)]),y-h,abs(a(n,1)-a(n,2)),2*h]),1:size(a,1))
%with numbers if you want them:
arrayfun(@(n)text(min([a(n,1) a(n,2)]),y+2*h,...
num2str(size(a,1)-n+1)),1:size(a,1))
Fangjun Jiang on 21 Jul 2011
If you don't want the star, you just need to modify the plot() line. Help plot will show you different color, marker, and line style. Paulo uses rectangle() to draw the box. Oleg uses line() to draw the box. Mine uses the line width to fake the box. If you set the width bigger, it's pretty good. set(h,'LineWidth',8,'color','red')
B_Richardson on 22 Jul 2011
I see. I took a break from the code (working on my research poster). I'm going to try and implement this in my final design next week. Thank you all for your help and consideration!

### More Answers (2)

Fangjun Jiang on 20 Jul 2011
B=[30.7805 28.7527 25.7110 23.6832 19.6268 17.5949 14.5547 11.5147 8.4725 5.4313
29.7667 27.7333 24.6923 21.6549 18.6114 15.5708 12.5285 9.4806 7.4582 4.4159];
h=line(B,zeros(2,10));
hold on;
plot(B(1,:),zeros(10,1),'y*');
plot(B(2,:),zeros(10,1),'bo');
set(h,'LineWidth',2,'color','red')
Fangjun Jiang on 20 Jul 2011
Well, you changed the size of your B from previous one (10x2 vs. 2x10).
B_Richardson on 20 Jul 2011
I see. I was confused as to how the plot function would accept the matrix. In reality, it doesnt matter to me whether it is 10 by 2 or 2 by 10. As long as the points are in the correct order (start/stop)

B_Richardson on 20 Jul 2011
I see that it works, but i'm trying to translate it into guide
##### 3 CommentsShow 1 older commentHide 1 older comment
B_Richardson on 20 Jul 2011
Im not sure if i understand? The matrix B is created in a GUI from user input. I am then, going to plot this data in axes in the GUI. Do this make sense?
Fangjun Jiang on 20 Jul 2011
Then, you'll probably have a button in your GUIDE GUI. In its callback function, you'll get the data B, create an axes and the use the above code to create the figure.