[Haskell-cafe] Mathematics and Statistics libraries

[Aleksey Khudyakov]

> There is the plot[1] library which provides for updateable plots from GHCi
> REPL and has a gnuplot-like interface.  I wrote it for this very reason, a
> mathematics/statistics development environment.
>
> It uses Data.Vector.Storable, which provides for compatability with both
> statistics and hmatrix packages (as well as hstatistics).

Looks very interesting. I'll try it out.


>> I think talking about data frames is a bit pointless unless we specify
>> what is data frame. Basically there are two representations of tabular
>> data structure: array of tuples or tuple of arrays. If you want first go
>> for Data.Vector.Vector YourData. If you want second you'll probably end
>> up with some HList-like data structure to hold arrays.
>>
> Matrices from hmatrix are easily converted to rows or columns of
> Data.Vector.Storable and can be sliced and otherwise manipulated.
>
That's why I said that homogenous data frame is simple. But if you want to
have columns which hold values with different type they lo longer a matrix
and thing become way more interesting.