MATLAB Answers

Placing annotations at specific xy coordinates

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Vance Blake
Vance Blake 2019년 9월 13일
댓글: Vance Blake 2019년 10월 16일
Just wondering but I wanted to put annotations/text boxes at specific coordinates but when I read up on the page I saw that the values of x and y in the 'dim' vector must be between 0 and 1. Im just looking for a way to place 'X's at specific xy coordinates to signify that those points are no longer being considered for my calculations?? I figured annotations would be good way to accomplish that because I wanted to avoid matlab cconsidering a plotted X as an active point and therefore valid for my calculations. If you have any work arounds or suggestions Im all ears. Thanks for the help

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Adam Danz
Adam Danz 2019년 9월 13일
편집: Adam Danz 2019년 9월 13일
Annotations are a pain to use unless the axes are normalized to 0:1. I see no reason why Matlab cannot allow users to specify the units in annotations which would make the tool a lot more useful.
"Im just looking for a way to place 'X's at specific xy coordinates to signify that those points are no longer being considered for my calculations"
That's much easier than anything annotation can do. Simply use the xy coordinates to plot "X"'s
hold on
plot(x,y,'rx')
If you wanted rectangles for whatever reason,
widthHeight = [.1,.1];
rectangle('Position', [x-widthHeight(1)/2, y-widthHeight(2)/2, widthHeight])
  댓글 수: 5
Vance Blake
Vance Blake 2019년 10월 16일
Hey Adam how are you ? Its been a while but I have some more questions that I would really like your help with when you get the chance the link to the question is below. https://www.mathworks.com/matlabcentral/answers/485730-define-an-if-statement-based-on-on-finding-duplicate-values-between-arrays-and-then-rewrite-code-to

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Image Analyst
Image Analyst 2019년 9월 13일
No, not true. If you want to place annotation text onto a plot you can use text() using the x,y that's used for that plot, whatever range it might have, which can be more than 1.
Have you tried
badIndexes = .......whatever you need to do to identify "points are no longer being considered for my calculations"
hold on
plot(x(badIndexes), y(badIndexes), 'rx', 'MarkerSize', 15, 'LineWidth', 2) % Overlay big red X's

Bruno Luong
Bruno Luong 2019년 9월 14일
There are several tool on File Exchange, such as this one

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