Tensor

[Akyl Tulegenov]

Dear All!

I faced a problem when implementing class Tensor. The idea is
simple - give a rank as an input to produce a tensor of rank n.
But how to do it programmatically w/o the use of any "if
then" statements? At the moment I have a large number of classes
Tensor_N, which doesn't look nice, and doesn't fit to the problem I'm
trying to solve.
for rank one I need *array, for 2 **array, for 3 ***array, etc.
Is there any way to make it as a black box?
For instance, create a string beginning with n stars and use it in
the code??? A tiny code-snippet would be extremely helpful to catch the
general idea. Certainly, if it is possible at all.

Cheers.
Akyl.

 

[bartek]

Dear All!

I faced a problem when implementing class Tensor. The idea is
simple - give a rank as an input to produce a tensor of rank n.
But how to do it programmatically w/o the use of any "if
then" statements? At the moment I have a large number of classes
Tensor_N, which doesn't look nice, and doesn't fit to the problem I'm
trying to solve.
for rank one I need *array, for 2 **array, for 3 ***array, etc.
Is there any way to make it as a black box?
For instance, create a string beginning with n stars and use it in
the code??? A tiny code-snippet would be extremely helpful to catch the
general idea. Certainly, if it is possible at all.

As I understand, you need a multi-dimensional array.
Here's the first hit I got from google on the subject:
http://www.codeproject.com/cpp/multi_array_using_TMP.asp

 

[John Harrison]

As I understand, you need a multi-dimensional array.
Here's the first hit I got from google on the subject:
http://www.codeproject.com/cpp/multi_array_using_TMP.asp

That's definitely the technique to go for, but also have a look at the boost
version

http://www.boost.org/libs/multi_array/doc/index.html

john