Scaling an imaged array

2011 8 8
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A = Some matrix of dimension (n x n)
'image(A)' creates an image with side length of n. Is there there a way to resize this image?

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Image Analyst
Image Analyst 2011-8-8
Do you mean that you want to change the number of elements in the array, like you'd do with imresize(), or do you mean that you want to change the size of the axes control that the image is displayed in, as you'd do with the set(handle, 'Position',...) function?
Frank
Frank 2011-8-9
Change the size of the axis. So display a shrunken version of the image.
Frank
Frank 2011-8-9
Actually, the value of the axis. If image(A) is plotted from x=[0 10] and y = [0 10], a rescaled version would be the same image but, say, a quarter of the size plotted from x = [0 5] and y = [0 5].

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Walter Roberson
Walter Roberson 2011-8-8

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You can pass in to image() the x and y coordinates of the lower left and upper right centers of the corresponding pixels (note this is not the coordinates of the edges of the pixels.) The coordinates would be in whatever data coordinates are in effect (or get rescaled to in later calls).
Note that changing the coordinates might not have an visual result unless there is already spare room in the axes. The size of the axes (relative to the uipanel or figure) determines the density of the data coordinates.
If your image is relatively small and there is obviously more available room, then something might have executed "axis tight" and you might want to reverse that.

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Frank
Frank
2011-8-8

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