2d scan plot in matlab
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Sumera Yamin
am 29 Jan. 2021
Kommentiert: Sumera Yamin
am 2 Feb. 2021
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.
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Star Strider
am 29 Jan. 2021
What your Question lacks in clarity it makes up for in obfuscation.
2 Kommentare
Star Strider
am 29 Jan. 2021
Bearbeitet: Star Strider
am 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')
EDIT — (29 Jan 2021 at 17:31)
Updated plot code.
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Sumera Yamin
am 2 Feb. 2021
Bearbeitet: Sumera Yamin
am 2 Feb. 2021
2 Kommentare
Star Strider
am 2 Feb. 2021
The imagesc function and pcolor function are significantly different.
Compare these:
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')
and:
figure
pcolor(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')
The imagesc function is defined by the centres of the squares, the pcolor function is defined by the edges of the squares, so the pcolor plot is one less in each dimension.
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