With what code can I make Matlab do this operation automatically

1 次查看（过去 30 天）

显示更早的评论

Ricardo Gutierrez 2018-1-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/378615-with-what-code-can-i-make-matlab-do-this-operation-automatically

评论： Star Strider 2018-1-24

采纳的回答： Star Strider

在 MATLAB Online 中打开

Good morning.

I hope you can help me.

How can I enter the elements of a vectror automatically in the formula, to obtain the value of E and then introduce the elements of the next vector. Everything automatically.

____________________________

clc;  clear;  close all
x1=[1 2 3 4 5 6 7 8 9 10]
x2=[2 4 6 8 1 3 5 2 3 1]
x3=[2 1 4 2 6 4 8 3 8 3]
E=exp(x1(1))+exp(x1(2))+exp(x1(3))+exp(x1(4))+exp(x1(5))+exp(x1(6))+exp(x1(7))+exp(x1(8))+exp(x1(9))+exp(x1(10))

__________________________________________________________________________________________________

Regards

3 个评论
显示 1更早的评论隐藏 1更早的评论

Ricardo Gutierrez 2018-1-23

First thanks for answering. I have E1 is evaluated with the vector A0, now it is necessary to evaluate with the vector A1 and A2. Evaluate A0, A1 and A2 automatically. Thanks and regards

Ricardo Gutierrez 2018-1-24

Excellent!!! You are a genius. Thank you

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Star Strider 2018-1-23

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/378615-with-what-code-can-i-make-matlab-do-this-operation-automatically#answer_301408

编辑：Star Strider 2018-1-23

在 MATLAB Online 中打开

Try this:

E = sum(exp(x1))
E =
    34.8438

You can also create an anonymous function to do this:

Efcn = @(x) sum(exp(x));
E = Efcn(x1)

and use it as you would any other function.

EDIT — (23 Jan 2018 21:38 UCT)

To do all of them at once:

x1=[1 2 3 4 5 6 7 8 9 10];
x2=[2 4 6 8 1 3 5 2 3 1];
x3=[2 1 4 2 6 4 8 3 8 3];
E = sum(arrayfun(@exp, [x1; x2; x3]), 2)
E =
    34.8438
     3.6478
     6.5322