NullPointerException when loading CSV with some blank rows

[Ruin0x11]

I tried reading a simple CSV file with rows like this, where some of the values are null:

1981-02-23,0.3635,0.3654,0.3635,0.3635,,
1981-02-24,0.3543,0.3543,0.3506,0.3506,0.438,
1981-10-01,0.2251,0.2269,0.2251,0.2251,0.305,0.388

The data was loaded with to-dataset, but when I use to-matrix on it, this error occurs:

NullPointerException   mikera.vectorz.AVector.set (AVector.java:1454)

[mikera]

Hmmmmm I think to-matrix requires non-null numerical values in all elements of the matrix.

You'll probably need to either filter out such rows, or convert to a valid numerical value first.

[joinr]

Maybe provide feedback as to where and why error occurred? Small bit of data validation before passing to function expecting non nulls rather than opaque npe (sharp edge for newbs)