Define a variable?

Hello,

I want to plot n spheres. Its working but the variable k is always red underlined because I didnt defined it before the loop. How can I define this variable?

for i = 1:n
    k(i) = surf(r*x+p(i,1),r*y+p(i,2),r*z+r);
end

Answer 1

[SungJun Cho]

The red underline occurs when you have not preallocated your array (or matrix).

You can just do

k = zeros(1,n);
for i = 1:n
    k(i) = surf(r*x+p(i,1),r*y+p(i,2),r*z+r);
end

and this should solve your problem.

[gamer]

thanks:)

[SungJun Cho]

You're welcome!