removing part of a box plot

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Adrian Lee 2021-2-19

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/749854-removing-part-of-a-box-plot

评论： Adam Danz 2021-2-21

boxx = [3;7;7;3;3];
boxy = [3;3;7;7;3];
figure(1)
boxing = plot(boxx,boxy);
xlim([0 11]);
ylim([0 11]);

the code above plots a simple box

how do i remove part of the box such as removing everything above y=6?

to be clearer, to remove the top, y=6 to y=7 part of the line from the left and right lines

ie, removing the blue lines above the green line shown in the picture below

the simple method i know of is to make a new plot by slightly changing the values in the code such as below

boxx = [3;3;6;6];
boxy = [6;3;3;6];
boxing = plot(boxx,boxy);

but since i need it to be dynamic where sometimes i want it at y=5 or y=6.5 and will use the same concept with other shapes such as circulars, triangulars or 2d polygons

is there a different method or code i can use to remove the lines?

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Adrian Lee 2021-2-21

ah, i see

hmm,

i would need an equation for identifying the length needed before the rotation

then use the rotation matrix for plotting a new line... or i am mistaken?

Adam Danz 2021-2-21

No, that's not quite right.

If the edges of your rectangle are not parallel to the axes you'll need to rotate the rectangle so that it is parallel, then apply the cutoff, and then counter-rotate it back to its original orientation.

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