Flipping a plot by 180 degrees

Hi!

I want to flip/rotate the plot in the attachment, such that the right part of the plot is rotated to the left and vice versa. I have used flip command but doesn't seem to work. I have also used camroll(-90), view() and set(gca,'YDir','reverse') to achieve my desired result.

Answer 1

[Bruno Luong]

[x,y]=find(peaks>0.7)
close all

subplot(2,1,1);
plot(x,y,'or')

subplot(2,1,2);
plot(x,y,'or');
% This command will rotate the plot by 180 degree
set(gca,'xdir','reverse','ydir','reverse')

[Sayyed Ahmad Fani Yazdi]

a good idea. To flip a plot you have to use only

set(gca,'xdir','reverse')

for x axis

or

set(gca,set(gca,'ydir','reverse')

for y axis

by using

set(gca,'xdir','reverse','ydir','reverse')

you create a rotation.

But the reverse is not a flip. For a flip you need an axis wich means X=-x for axis x.

For reverse you change the arngment of the value. That means you sort the values in another direktion.

[Subha Bose]

Sayyed,

Many thanks for your reply. I have already tried set(gca,'Ydir','reverse') before posting this question here. But unfortunately, I am not able to get my desired result. Moreover, when I am using X=-x to flip the x axis, the axis values become negative and I am unable to change them to positive x-axis values. There must be a way to preserve x-axis values even after fliipping the axis using -x values.

[Bruno Luong]

Ydir in reverse with flip top/bottom.

If you want to flip left/right you must perform Xdir reverse.

If you want to rotate 180 degree you have to do both as I showed above.

BTW if you want to thanks Sayyed for his reply post your comment under his post.

[Subha Bose]

Bruno,

Thanks for your reply. I was trying both options but somehow I commented under a different post. My mistake.

I just tried set(gca,'xdir','reverse','ydir','reverse') and it worked, but I need to change the axes values for both X and Y since the axes values have also been reversed. I am trying XTickLabels and YTickLabels for now.

[Bruno Luong]

If you want to rotate 180 by keeping the same axis range, you need to change the data.

[x,y]=find(peaks>0.7);

xf = min(x(:))+max(x(:))-x;
yf = min(y(:))+max(y(:))-y;

close all
subplot(2,1,1);
plot(x,y,'or')
subplot(2,1,2);
plot(xf,yf,'or');

[Subha Bose]

Bruno,

Thanks for your help. I am getting the desired output now!

Answer 2

[Sayyed Ahmad Fani Yazdi]

if your x values are positive nambers you need only use

x=-x

and plot again. It could be flip your plot at y axis

[Subha Bose]

Although the above suggestion worked, once I use -x values, I am unable to insert positive x-axis ticks. Is there a way to flip the plot as well as use positive values for the x-axis ?