A simple scatter plot from a 2d matrix

192 views (last 30 days)
Hello, I couldnd find the answer anywhere :(
I am looking to make a simple scatter plot, with 1:5 range on both axes, that show a marker at the a1,a2 locations
Ideally, it wouldnt hurt to show the calculated f(a1,a2) value of each point, or maybe colorcode the markers but thats not crucial.
I tried quite a few: plot, plot3, surf, scatter, without success :(
Here is my code:
a1=rand(5,1)*3;
a2=rand(5,1)*3;
[x1, x2] = meshgrid(a1,a2);
ff= -sin(x1).*(sin(x1.^2./pi())).^2 -sin(x2).*(sin(2.*x2.^2./pi())).^2;
Thank you!!

Accepted Answer

Kelly Kearney
Kelly Kearney on 20 Oct 2021
Are any of these what you're looking for?
a1=rand(5,1)*3;
a2=rand(5,1)*3;
[x1, x2] = meshgrid(sort(a1),sort(a2)); % sort for for surf plot
ff= -sin(x1).*(sin(x1.^2./pi())).^2 -sin(x2).*(sin(2.*x2.^2./pi())).^2;
subplot(2,2,1);
plot(x1, x2, 'k.');
title('plot');
subplot(2,2,2);
plot3(x1, x2, ff, 'k.');
title('plot3');
subplot(2,2,3);
surf(x1,x2,ff);
title('surf');
subplot(2,2,4);
scatter(x1(:), x2(:), [], ff(:), 'filled');
title('scatter');
  1 Comment
Emmanouil Karamousadakis
Emmanouil Karamousadakis on 20 Oct 2021
Edited: Emmanouil Karamousadakis on 20 Oct 2021
Amazing! I was overthinking #1 subplot, that works fine.
But the #4 is GREAT!!!
Thank you!!!

Sign in to comment.

More Answers (0)

Products


Release

R2021b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!