The pixel size of an image doesn't match the axis scale

조회 수: 5(최근 30일)
MCC 2020년 11월 29일
댓글: MCC 2020년 11월 30일
I plot an image, which is shown below. According to the X axis scale, the legth of red line is 0.5. And the black line is the same length as red line. So, the total length of this two lines is 1. If you look the the X axis, the total length of the two line is close to 2.5, which does not match the X axis dimension.
My question is that can we change the dimension of the piexl so that pixel size of an image match the axis scale.
  댓글 수: 4
MCC 2020년 11월 30일
No, it's not the default. Please find the code and data in the attachment.
Thank you,

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Image Analyst
Image Analyst 2020년 11월 29일
Since the distance between tick marks is 2, and the left one is at 0.5, then the left edge of the image is at X = (0.5 - 2) = -1.5.
So the red line is about 2 long, and the gray line is around 1.8 long and the total of the two lines is about 2 + 1.8 = 3.8 long.
Did you use 'XData' and 'YData' in imshow when you displayed it?
imshow(yourImage, 'XData', [xmin, xmax], 'YData', [ymin, ymax]);
  댓글 수: 1
MCC 2020년 11월 30일
Thanks for your reply. I tried this but it doesn't work. I have attached the code and data. Thanks again.

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