[英]Complex Vectors in Matlab d
I am lost on how to make the vector x j = sin(pi(j-1)/10), j = 1,...,21
in matlab. 我不知道如何在Matlab中使向量x j = sin(pi(j-1)/10), j = 1,...,21
。
Also I am trying to make the vector x j = 2 -j , j=0,1,...,20.
我也试图使向量x j = 2 -j , j=0,1,...,20.
For the last one I tried which I am trying to get the cumulative sum without a for loop. 对于最后一个尝试,我尝试不使用for循环来获取累加和。
x = 0:20
s = cumsum(2^-x)
I know that the should both have relatively similiar answers but I only understand how to make simple vectors and not these complex ones. 我知道都应该有相对类似的答案,但我只了解如何制作简单的向量,而不是这些复杂的向量。
To make the vector x j = sin(pi(j-1)/10), j = 1,...,21 you do exactly that: 为了使向量x j = sin(pi(j-1)/ 10),j = 1,...,21,您可以精确地做到:
j = 1:21;
xj = sin(pi*(j-1)/10);
Similarly, to make the vector x j = 2 -j , j=0,1,...,20: 同样,要使向量x j = 2 -j ,j = 0,1,...,20:
j = 0:20
xj = 2.^-j
Do note the .^
operator. 请注意.^
运算符。 You usually want to apply element-wise operators in these cases. 在这些情况下,通常需要应用逐元素运算符。
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