how can I store this data in an array using loop?

1 次查看（过去 30 天）
Farhan Ashraf
Farhan Ashraf 2018-1-18
评论： Farhan Ashraf 2018-1-18
Hello. I am trying to run the below code. but its not working. I want to run the loop 5 times and calculate the value of x for 5 temperatures and store in a matrix.
please help. thanks
a=1;
v=2;
p=1e-5;
vac=zeros(1,5);
T=[77,295,600,750,1234];
for i=1:length(T)
x=exp(a)*exp(-v/(p*T));
vac(i)=x;
end

请先登录，再回答此问题。

采纳的回答

Birdman
Birdman 2018-1-18
You don't need a loop. Try the following:
vac=exp(a).*exp(-v./(p.*T))
  4 个评论
显示 2更早的评论
Guillaume
Guillaume 2018-1-18
编辑：Guillaume 2018-1-18
Note that the only operator that should absolutely be dotted is the ./. The others are multiplications with scalar so either .* or * work.

请先登录，再进行评论。

更多回答（1 个）

Guillaume
Guillaume 2018-1-18
You forgot to mention what it is not working mean: You get error using / Matrix dimensions must agree. That's because you forgot to index T so you're dividing a scalar by a vector which is not a valid matrix operation, so one way to fix your problem:
x = exp(a)* exp(-v/(p*T(i)));
However, you don't need a loop at all, you could use vectorised operations. For that you need to use ./ instead of /:
a = 1; v = 2; p = 1e-5; %constants
T = [77, 295, 600, 750, 1234];
vac = exp(a)*exp(-v./(p*T)) %no loop needed

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