maartenvd

I feel rather silly, as the second example is actually also an error. ``` temp = call_matlab(1,"feval",[args[1],temp]) ``` call_matlab will return a vector, which gets put into temp. temp then...

Ok so the problem is that my R is rank-defficient, and the inverse (which is done using trtrs) fails. I made sure my R's are now full rank and everything...

>LinearAlgebra backward functions have the problem of exploding gradients. When do they have this problem? I know svd has it, but I assumed that the backward differentiation of qr was...