Tall Matrix Index Extraction

1 次查看(过去 30 天)
To All:
I have a varying size model of the dimensions (L x nx)
L = number of data points
nx = number of variables per data point
In the algorithm that I am using, it moves the data around to support a search of the data space.
A small example could be this:
x = [1,2;3,4;5,6];
id =[1,6;2,4;1,5];
xnew = x(id);
disp(xnew); %[1,6;3,2;1,4];
Now while this isn't too difficult, my state "x" is in reality a tall matrix.
xtall = tall(x);
xnewtall = x(id); % crashes!
Does anyone know how to do this without having to do every individual point independently?

回答(1 个)

SaiDileep Kola
SaiDileep Kola 2021-1-13
Since tall matrices are challenging in terms of memory, how about parsing arrays "xtall" and "id" and using with appropriate offsets, up on that par-for would run efficiently, this could be a bit better thatn individual point independently.
Some task on similar problem is done here.
  1 个评论
Blake Van Winkle
Blake Van Winkle 2021-1-13
To SaiDileep:
I appreciate the thought. This approach does reduce the time required, but it is still less efficient than if there was a total dimensional indexing solution.
Thanks,
Blake

请先登录,再进行评论。

类别

Help CenterFile Exchange 中查找有关 Matrix Indexing 的更多信息

产品


版本

R2019a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by