> Hi,
>>
>> Thanks for the explanation. Suppose I have a named array X with 3 columns
>> "x1", "x2" and "x3" and I do prod(X, 2). Will the resulting array (a single
>> columns in this case) have a sensible name like "x1x2x3" ? Or more
>> generally, how are these new names generated and for which operations ?
>>
>> For some operators NamedArrays tries to generate sensible names,
> including prod():
>
> julia> n = NamedArray(rand(2,3), ([:a, :b], [:x1, :x2, :x3]), ("rows",
> "cols"))
>
> 2x3 NamedArray{Float64,2,Array{Float64,2},(Dict{Symbol,Int64},Dict{Symbol,
> Int64})}
> rows \ cols x1 x2 x3
> a 0.712609 0.607843 0.18794
> b 0.208052 0.4409 0.282238
>
> julia> prod(n, 2)
> 2x1 NamedArray{Float64,2,Array{Float64,2},(Dict{Symbol,Int64},Dict{
> ASCIIString,Int64})}
> rows \ cols prod(cols)
> a 0.0814106
> b 0.0258897
>
>
> So the column in this case is called "prod(cols)". Note that we started
> with symbols as names for columns indices in this example but prod()
> "normalizes" this to ASCIIStrings.
>
> I've worked hard to make the index type a free choice, but some
> automatically generated names default to Strings.
>
> You can find the list of operations for which NamedArrays tries to give
> sensible names here
> <https://github.com/davidavdav/NamedArrays/blob/master/src/changingnames.jl>,
> in the source code. I am open for suggestions and pull requests for more
> functions or other names.
>
> As a result of your original question I am now implementing the matrix
> operation support more thoroughly, basically following the Julia manual for
> possible matrix operations. Some take a bit of effort to implement, for
> some I need to think about sensible names for the dimensions. Expect an
> update within the next week or so.
>
> Cheers,
>
> ---david
>
Hi David,
Thanks for the example and a link to the source file. I found it very
educational and useful. My original motivation was to check what is (or
cloud be) a best practice in Julia for creating e.g. all interactions of
say 3 variables and have sensible names filled in automatically.
NamedArrays seems to be a good start.
In addition, is there any documentation for Symbol and Dictionary types ? I
found very little about it in Julia manual.
Best regards,
Jan
