axis mapping

2011 4 25
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Hi Matlabers,
I have an intensity profile obtained after fft2 an aperture function. It is in Kx-Ky plane. I need to map both Kx and Ky to x and y so that the intensity profile in x-y plane. The relationship between Kx and x, Ky and y are just Kx=Constant*x and Ky=Constant*y. Same constant. So basically a scaling of axis. But because the intensity profile is a 2048 by 2048 matrix, I don't know how to map the axes.
Can anyone help me please?

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Andrew Newell
Andrew Newell 2011-4-25

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You seem to be asking for
x = Kx/Constant;
y = Ky/Constant;
which will work just as written if Kx and Ky are any kind of numerical array and Constant is a scalar.

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Kevin
Kevin 2011-4-25
Hi Andrew,
Thank you for the reply.
No...The intensity profile is a matrix. The elements of the matrix is the intensity. I use imshow so that an intensity profile image is shown. Even though right now it's in Kx-Ky plane, I cannot just divide the matrix by a constant because this way what I am really changing is the intensity elements, not the scaling.
Andrew Newell
Andrew Newell 2011-4-25
Sorry - now I see your reference to scaling the axis. By this I presume you mean the color scale, which you can do using CAXIS.

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Kevin
Kevin
2011-4-25

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