linspace and colon with column vector output

Question

Ilya 2014-4-30

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/127758-linspace-and-colon-with-column-vector-output

编辑： Matt J 2014-5-1

Is it possible to generate column sample vectors by using either linspace()/logspace() or : - operator ?

The background is that I'm using extended precision calculations, and my inputs are also of an extended precision data type. The inputs are generated with linspace or colon, but transposing of symbolic/extended precision data (e.g. a=a.' or a=a(:)) is by far as not cheap as transposing some double data.

And reshaping of the output of linspace() or colon operator may be quite time consuming for double vectors of a large length.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Matt J 2014-5-1

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/127758-linspace-and-colon-with-column-vector-output#answer_135243

编辑：Matt J 2014-5-1

And reshaping of the output of linspace() or colon operator may be quite time consuming for double vectors of a large length.

Shouldn't be. No manipulation of the data is done when you transpose/reshape a vector. A simple change to the size(X) data in the underlying mxArray object is made.