size

3 次查看（过去 30 天）
skyimager
skyimager 2012-5-31
VAR_START =
9 12 14 17 24 31 34 37 40 43 46 49 52 55 58 61 64
>> NVAR = size(VAR_START)
NVAR =
1 17
What is the function of 'size' here???? why is it giving 1 17...???? I am srry bt i cannot understand!!!
  1 个评论
Oleg Komarov
Oleg Komarov 2012-5-31
For future reference whenver you don't know wha rt a function does, doc size, or use F1

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Image Analyst
Image Analyst 2012-5-31
That's just the way size works. It's kind of like they expect size() to be used with arrays that are 2 dimensions or more. Get used to it. It says your "array" is 1 row by 17 columns. If you want just the "17" and not the "1" and you know in advance that you have a 1 dimensional array, then use length() function instead of the size() function. The length() function will give you 17 - a single number - without it being a 2 element result with the unhelpful "1" as the first element. length() gives you the length of the longest dimension, which is kind of confusing, so I use length() for 1D arrays (and only for 1D arrays), and size() for 2D or higher dimensional arrays.

更多回答（1 个）

Honglei Chen
Honglei Chen 2012-5-31
Because VAR_START is a 1x17 vector, i.e., number of rows is 1 and number of columns is 17

类别

在 Help Center 和 File Exchange 中查找有关 Resizing and Reshaping Matrices 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