Plotting Vector Field for F(x,y,z) = (x+y+z)/(x​^2+y^2+z^2​)^1.5

clear all
[x, y, z] = meshgrid(-50:1:50,-50:1:50,-50:1:50);
i = 1/(x.^2+y.^2+z.^2).^(3/2);
j = 1/(x.^2+y.^2+z.^2).^(3/2);
k = 1/(x.^2+y.^2+z.^2).^(3/2);
quiver3(x,y,z,i,j,k)

Could anyone tell me where is the issue, nothing show up in the figure but no error founded.

Answer 1

[Walter Roberson]

clear all
[x, y, z] = meshgrid(-50:1:50,-50:1:50,-50:1:50);
i = 1/(x.^2+y.^2+z.^2).^(3/2);
j = 1/(x.^2+y.^2+z.^2).^(3/2);
k = 1/(x.^2+y.^2+z.^2).^(3/2);
i(~isfinite(i)) = nan;
j(~isfinite(j)) = nan;
k(~isfinite(k)) = nan;

quiver3(x,y,z,i,j,k)