How to specify an exact value of variable in (For Loop)

Question

Ali Tawfik 2019-7-12

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/471368-how-to-specify-an-exact-value-of-variable-in-for-loop

评论： Ali Tawfik 2019-7-12

Hi all,

I am doing a for loop, but I am wondering how can I extract/specify a value of x when i =2 or 3?, the x now has 3 different values, how can I extract a specific value.

for i=1:3

x=i+2

end

Thanks,

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2019-7-12

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/471368-how-to-specify-an-exact-value-of-variable-in-for-loop#answer_382918

在 MATLAB Online 中打开

for i=1:3   
  x(i)=i+2;
end
x(2:3)

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Ali Tawfik 2019-7-12

Hi,

Thanks for your prompt reply.

I have been trying the same for the following commands, but I could not, and got that error, (I got that error, Subscript indices must either be real positive integers or logicals.),

for i=[90,30,-30]

theta(i)=i*pi/180

end

& also, when type length of (i) it equals =-30, how ?, and I have 3 variables ?

actually, I hope to have 3 variables (one at i =90, and another =30, and so on ]

So please could you tell me how could I do this ?

Thanks,

请先登录，再进行评论。