Representing a Matrix Graphically (but not exactly)
显示 更早的评论
Hello All, I'm new here. I tried looking for this topic, but couldn't find anything.
What I want to do is to represent a matrix graphically. That means that I want the values of each cell in the matrix to appear on a graph on the X,Y coordinates of the cell. For instance, if I have the next matrix:
5 2 1
0 2 3
9 3 7
So the 5 in the first row will be at (1,1), 2 at (1,2), 1 at (1,3), etc. The values can be replaced by '*' or any other symbol really.
Thanks, eliya
采纳的回答
Walter Roberson
2011-3-3
Or if you want a representation that is color coded but contains no symbols
imagesc(ArrayName)
更多回答（4 个）
Paulo Silva
2011-3-3
a=[5 2 1
0 2 3
9 3 7]
axis([0 size(a,2) 0 size(a,1)])
for b=1:numel(a)
[x,y]=ind2sub(size(a),b)
text(x,y,num2str(a(b)))
end
Matt Fig
2011-3-3
Like this (a surface?):
Z = [5 2 1
0 2 3
9 3 7];
surf(Z.')
xlabel('X')
ylabel('Y')
Matt Tearle
2011-3-3
z = [5 2 1 <etc>
[m,n] = size(z);
[x,y] = meshgrid(1:n,1:m);
plot3(x(:),y(:),z(:),'o')
or
text(x(:),y(:),num2str(z(:)))
Or even just
image(z), colorbar
BTW, typically you'd think of the columns as the x coordinate, so 2 would actually be at x=2, y=1. If that's not what you want, just flip the role of x and y.
1 个评论
Walter Roberson
2011-3-3
Or instead of plot3, use scatter3
scatter3(x(:),y(:),z(:))
类别
在 帮助中心 和 File Exchange 中查找有关 Spline Postprocessing 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
