unfold uses depreciated Matrix function

[karlrohe]

Hi @zamorarr!

Thanks so much for this code. As far as I know, there is no other code for basic manipulations of sparse tensors in R.

I've run into some problems when unfolding sparse tensors.

When, I run your tutorial code:

subs <- list(c(1,1,1), c(1,1,2))
vals <- c(10, 20)
dims <- c(2,2,2)
x <- sptensor(subs, vals, dims)
unfold(x,1)

I get a warning:

Warning message:
In Matrix::sparseMatrix(i = i, j = j, x = vals, dims = newdims, :
'giveCsparse' has been deprecated; setting 'repr = "T"' for you

Is this something you have the time to fix?
Thanks so much,
Karl