用 Matlab 寫一個方程（矩陣大小） (writing an equation with Matlab (Matrix size))

問題描述

用 Matlab 寫一個方程（矩陣大小） (writing an equation with Matlab (Matrix size))

也許我的問題不相關，但我真的需要幫助..

我在 Matlab 上有這個等式：

returns(t,:)=IR (t‑1+n,C)+rawreturns(t+n,:)*weights/(sum(abs(weights)));

IR是向量，rawreturns 是矩陣，這樣寫對嗎？意思是，將向量（r，1）與矩陣（r，c）相加是否正確

提前謝謝！

參考解法

方法 1:

As a simple example from what i understand I would say it should work

 A=[1;2;3;4;5];
 b=rand(5,3);
 b =[ 0.2322316   0.8267251   0.8388056
      0.0517476   0.6707926   0.2303345
      0.0081088   0.3644391   0.0703019
      0.6496504   0.6778138   0.3403278
      0.6505520   0.0227597   0.3787280]

 c=A+b
 c= [1.2322   1.8267   1.8388
     2.0517   2.6708   2.2303
     3.0081   3.3644   3.0703
     4.6497   4.6778   4.3403
     5.6506   5.0228   5.3787]

i hope this is what you were looking for.

(by Nourhaine Nefzi、serpentor)

參考文件

1. writing an equation with Matlab (Matrix size) (CC BY‑SA 2.5/3.0/4.0)