Find min value of each column of 2D lattice and plot
4 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
James Kosiol
el 16 de Mzo. de 2023
Comentada: Dyuman Joshi
el 16 de Mzo. de 2023
Hey everyone,
I am looking to create a 10 x 10 lattice with randomly assigned values for each coordinate then find the minimum value of each column of the lattice and finally plotting the lattice with the lowest number of each column coloured to show visually.
so far all I have is this:
clc
clear
P = randi(10, 10, 10);
for i = 1:1:10
[row(i), column(i)] = min(P(:,i));
[x,y] = meshgrid(1:10,1:10);
xlim([1,10])
ylim([0,10])
axis equal
x_l = reshape(x,[],1);
y_l = reshape(y,[],1);
figure; scatter(x_l,y_l)
hold on
scatter(x_l(row(i)),y_l(column(i)), 'R', 'filled')
end
but as you can tell, it doesn't work.
I hope this makes sense!
Thanks
0 comentarios
Respuesta aceptada
Dyuman Joshi
el 16 de Mzo. de 2023
Editada: Dyuman Joshi
el 16 de Mzo. de 2023
It is better to define variables not varying with the loop index, out of the loop. Moreso, as you are using figure().
It's not clear to me, if you want to color the minimum value or the index of the minimum value in each column. The code below corresponds to coloring the minimum value of each column.
Edit - Clarification below in the comments to color the index (first occurance) of the minimum value.
n=10;
P = randi(n, n, n)
[x,y] = meshgrid(1:n);
x_l = reshape(x,[],1);
y_l = reshape(y,[],1);
figure; scatter(x_l,y_l)
xlim([1,n])
ylim([0,n])
axis equal
xticks(1:n)
for i = 1:n
[~,idx] = min(P(:,i));
hold on
scatter(i,n+1-idx, 'R', 'filled')
end
You can achieve the result without the loop as well (As Rik mentioned below)
figure
scatter(x_l,y_l)
xlim([1,n])
ylim([0,n])
axis equal
xticks(1:n)
hold on
%directly obtain the indices
[~,ctr]=min(P)
scatter(1:n,n+1-ctr,'G','filled')
5 comentarios
Más respuestas (1)
Mathieu NOE
el 16 de Mzo. de 2023
not sure if I understood really what you want to do
maybe this ?
clc
clear
N = 10;
[x,y] = meshgrid(1:N,1:N);
xlim([1,N])
ylim([0,N])
axis equal
x_l = reshape(x,[],1);
y_l = reshape(y,[],1);
figure(1); scatter(x_l,y_l)
for i = 1:N
P = randi(N, N);
[m, ind] = min(P,[],'all','linear');
[r,c] = ind2sub(size(P),ind);
hold on
pause(0.4)
scatter(r,c, 'R', 'filled')
end
Ver también
Categorías
Más información sobre 2-D and 3-D Plots en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!