了解MATLAB中的冒号表示法 [英] Understanding colon notation in MATLAB

问题描述

因此，我对MATLAB完全陌生，并且试图了解数学运算中的冒号表示法.因此，在本书中，我发现了这一说法:

So I'm completely new to MATLAB and I'm trying to understand colon notation within mathematical operations. So, in this book I found this statement:

w(1:5)=j(1:5) + k(1:5);

我不明白它的真正作用.我知道w(1:5)几乎遍历了从索引1到5的w数组，但是在上面的语句中，w的所有索引最后不应该等于j(5) + k(5)吗?还是我完全错了这是怎么回事?如果有人在Java中发布与该版本相当的代码，那将是非常棒的.在此先感谢:-)

I do not understand what it really does. I know that w(1:5) is pretty much iterating through the w array from index 1 through 5, but in the statement above, shouldn't all indexes of w be equal to j(5) + k(5) in the end? Or am I completely wrong on how this works? It'd be awesome if someone posted the equivalent in Java to that up there. Thanks in advance :-)

推荐答案

我很确定这意味着

"w的前5个元素应是j的前5个元素+ k的前5个元素"(我不确定matlab数组是否以0或1开头)

"The first 5 elements of w shall be the first 5 elements of j + the first 5 elements of k" (I am not sure if matlab arrays start with 0 or 1 though)

所以:

w1 = j1+k1
w2 = j2+k2
w3 = j3+k3
w4 = j4+k4
w5 = j5+k5

在这里考虑向量加法".

Think "Vector addition" here.

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