Define a variable?

1 次查看（过去 30 天）
gamer
gamer 2021-6-17
评论： SungJun Cho 2021-6-17
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

请先登录，再回答此问题。

采纳的回答

SungJun Cho
SungJun Cho 2021-6-17
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.

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Loops and Conditional Statements 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by