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2d scan plot in matlab

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Hi,
I want to scan over 2 quantities lets say x and y. For every value of x, I scan over a range of y and record value z for every point. So I have an (x,y) grid and have z which is an x by y matrix. How would I do a 2D plot of over such quantities. Many thanks for any lead.

Accepted Answer

Star Strider
Star Strider on 29 Jan 2021
What your Question lacks in clarity it makes up for in obfuscation.
See if my Answer to Create array from table with observations with two codes will do what you want.
  2 Comments
Star Strider
Star Strider on 29 Jan 2021
Using that code, try this:
figure
imagesc(tally)
set(gca, 'XTick',(1:size(tally,2)), 'YTick',(1:size(tally,1)))
lix = sub2ind(size(tally), ix2, ix1);
text(ix1,ix2,compose('%d', tally(lix)), 'HorizontalAlignment','center', 'VerticalAlignment','middle')
Another option is the heatmap function.
EDIT — (29 Jan 2021 at 17:31)
Updated plot code.

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More Answers (1)

Sumera Yamin
Sumera Yamin on 2 Feb 2021
Edited: Sumera Yamin on 2 Feb 2021
what about using pcolor() command? This can also plot the data as i want
  2 Comments
Sumera Yamin
Sumera Yamin on 2 Feb 2021
I see your point now. I tested your code on my script. somehow my matlab complains "Undefined function or variable 'tally'. One more question. with imagesc(), y axis is flipped. I mean it goes from top to bottom, instead of bottom to top. (This is not a problem, just being curious for the reason).

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