Flipping a plot by 180 degrees

2019 1 14
2 个回答
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更新时间：2019 1 21
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0 个投票

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.
RADF_LS vs PA_scatter2.jpg

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Bruno Luong
Bruno Luong 2019-1-14
编辑：Bruno Luong 2019-1-14

1 个投票

[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')

6 个评论
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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
Subha Bose 2019-1-16
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
Bruno Luong 2019-1-16
编辑：Bruno Luong 2019-1-16
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
Subha Bose 2019-1-16
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
Bruno Luong 2019-1-16
编辑：Bruno Luong 2019-1-16
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
Subha Bose 2019-1-21
Bruno,
Thanks for your help. I am getting the desired output now!

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更多回答（1 个）

0 个投票

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

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Subha Bose
Subha Bose 2019-1-14
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 ?

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