conditions on dimensions of factor manifolds in productmanifold?

[daniel hernandez]

Hi, I just started very recently using manopt and I have a rather simple question. Are there any conditions on the dimensions of the manifolds that productmanifold can put together.

For instance, the code:

tuple.Wtemp = stiefelfactory(3,3);

tuple.Ptemp = euclideanfactory(3,4);

 

manifold = productmanifold(tuple);

works fine. But the code:

tuple.Wtemp = stiefelfactory(2,3);

tuple.Ptemp = euclideanfactory(3,4);

 

manifold = productmanifold(tuple);

where I just changed the 1st dimension in the first line gives an error

Subscripted assignment dimension mismatch.

Error in stiefelfactory/random (line 130)

            X(:, :, i) = Q;

I was looking through the documentation but could not find it explained so, are there conditions on the dimensions of the manifolds productmanifold can handle?

[BM]

Hello Daniel,

The problem is not on the productmanifold side, rather it is the way the Stiefel manifold factory is called in your code. In stiefelfactory(n,r), r has to be <= n. Could you verify this?

Regards,

Bamdev

[daniel hernandez]

Hi Bamdev,

Thanks. You were right. I had a bug in my code that was passing the wrong dimensions to stiefelfactory. Sorry about that, I should have tested more.

Regards,

Daniel

[BM]

Hello Daniel, 

We are happy that it worked out nicely. Let us know if you have any other query. 

Regards,

Bamdev