Plot all polyshapes in cell array
8 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
Hello,
I am learing Matlab and I would like to plot all polyshapes stored in a cell array (D) but avoiding for...end loop.
Each cell contains a 2d vector with each vertex coordinates.
So far I only know to plot it like this
for i=size(D,1)
plot(D{i}(:,2), D{i}(:,1));
end
Is there any more concise way to achieve it with a single instruction not using a for...end loop?
Thanks
0 Commenti
Risposta accettata
Voss
il 7 Mag 2022
You could use cellfun:
cellfun(@(x)plot(x(:,1),x(:,2)),D);
That's more concise, I guess, but it also may be less clear than the loop you already have. And it's not likely to be much different performance-wise.
[In general, cellfun(f,C) runs the function f on each cell of cell array C. In this case, the function is the anonymous function
@(x)plot(x(:,1),x(:,2))
and the cell array is D.]
2 Commenti
Più risposte (1)
Steven Lord
il 8 Mag 2022
If you've already created them in a cell array you can simply turn that cell array into an array of polyshape objects and plot that array. Or you could start with a polyshape array initially, filling it in as you go.
C = cell(1, 10);
A1 = repmat(polyshape, 1, 10);
for k = 1:10
N = nsidedpoly(1000, 'Center', [2*k 0], 'Radius', 0.75);
C{k} = N; % Create a cell
A1(k) = N; % Fill in an array
end
A = [C{:}]
plot(A)
axis equal
grid on
A1
figure
plot(A1)
axis equal
grid on
2 Commenti
Steven Lord
il 8 Mag 2022
Ah, I went off the subject of the message. You don't actually have polyshape objects in a cell array, you have coordinate data in the cell array. In that case, a skeleton for the approach I'd use:
% C is the cell array of coordinate data
P = repmat(polyshape, size(C)); % One polyshape per cell in C
for k = 1:numel(C)
data = C{k};
P(k) = polyshape(data(:, 2), data(:, 1));
end
plot(P)
I'm assuming the data in the cell array matches the requirements the polyshape function has for its inputs.
Vedere anche
Categorie
Scopri di più su Elementary Polygons in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!