Re: [Scikit-learn-general] dot product of sparse matrix and dense matrix

2011-11-12 Thread Gael Varoquaux
On Sat, Nov 12, 2011 at 07:43:08PM +0900, Mathieu Blondel wrote: > > No, it's not. The data wouldn't take the same memory, as it would be of > > different size in bytes. > But it would in theory be possible for int64 / float64 and int32 / > float32, no? In terms of size, yes. But if there are oth

[Scikit-learn-general] Ensemble learning?

2011-11-12 Thread SK Sn
Hi all, I am looking into how to combine classifiers using Scikit-learn. I think for general purpose, it could be useful to have functions like stacking and voting in scikit-learn. Is there any plan of developing ensemble methods? For now, I am writting my own snippet for stacking. First phase wo

Re: [Scikit-learn-general] dot product of sparse matrix and dense matrix

2011-11-12 Thread Mathieu Blondel
On Sat, Nov 12, 2011 at 6:07 PM, Gael Varoquaux wrote: > No, it's not. The data wouldn't take the same memory, as it would be of > different size in bytes. But it would in theory be possible for int64 / float64 and int32 / float32, no? Mathieu --

Re: [Scikit-learn-general] dot product of sparse matrix and dense matrix

2011-11-12 Thread Gael Varoquaux
On Sat, Nov 12, 2011 at 12:52:07AM +0100, Andreas Mueller wrote: > afaik it is also possible to convert X from int to float in-place. No, it's not. The data wouldn't take the same memory, as it would be of different size in bytes. Gael