how to do this array problem matlab

1 次查看（过去 30 天）
HIGH
HIGH 2015-3-22
评论： HIGH 2015-3-22
z=[2j;-pi/2;3]
https://www.dropbox.com/s/kdttn8irinpf8xr/Screenshot%202015-03-21%2023.06.02.png?dl=0
sqrt(zk) where zk is the kth element of array z.
  2 个评论
Geoff Hayes
Geoff Hayes 2015-3-22
HIGH - please describe in detail what problem you are attempting to solve. Instead of posting a link to an image, describe it in worlds.
HIGH
HIGH 2015-3-22
编辑：HIGH 2015-3-22
we have to specify the Matlab command that we would enter in order to evaluate the indicated sigma quantity . I cannot type it the symbols. that is why I posted the link to the question. Sorry I am new to this forum.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Naty S
Naty S 2015-3-22
Hey HIGH If I understand you correctly you want to sum the square value of a vector. Check the functions sum and sqrt http://www.mathworks.com/help/matlab/ref/sum.html?searchHighlight=sum http://www.mathworks.com/help/matlab/ref/sqrt.html?searchHighlight=sqrt
d=sum(sqrt(z(k:3)))
  1 个评论
HIGH
HIGH 2015-3-22
is this right too?
d=sum(sqrt(z(1:3)))
because when I did it your way it asks me to define k. so I typed k=(1:3).. then it gave me 2.7321 + 2.2533i... also when I did d=sum(sqrt(z(1:3))), it gave me the same answer. both ways are correct it seems?

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Matrix Indexing 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