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How to plot inequality?

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Ondrej Panek
Ondrej Panek on 4 Feb 2017
Answered: Karan Gill on 13 Feb 2017
Hello, can someone please show me, how to plot this inequality?
metr(x, point) < radius;
where 'x' is general point in 2D xor 3D, 'point' is concrete point in 2D xor 3D, expression 'metr(x, point) < radius' represents a neighbourhood of the 'point' with radius 'radius'. I would like to plot this neighbourhood to the graph - both in 2D and 3D. Thanks for your help!

Answers (1)

Karan Gill
Karan Gill on 13 Feb 2017
Here's an example of plotting an inequality. You'll need to adapt it.
>> v = -5:0.1:5;
[x,y] = meshgrid(v); % create a grid
ineq = x + y >= 1; % some inequality
f = double(ineq);
surf(x,y,f);
view(0,90) % rotate surface plot to top view

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