Chris has the Right answer. If you want a more brute force attack, you could
also fall back on Perl:
>> my $age_col=$self->data->slice(",0:0");
>> $age_col = pdl(float, $age_col->list);
(Mobile)
> On Aug 21, 2017, at 1:05 PM, Chris Marshall <[email protected]> wrote:
>
> Hi Adam-
>
> PDL::Char data is for arrays of fixed length strings
> and I'm not sure how the data conversions and indexing
> are handled. If you have columns of data I suggest
> taking a look at rcols() which allows you to specify
> column separators and whether the data is read into
> a PDL or into a perl array. The examples at the bottom
> of the rcols documentation (pdldoc rcols from the shell
> prompts or help rcols from the pdl2 or perldl shells)
> should help with what is possible.
>
> --Chris
>
>> On Mon, Aug 21, 2017 at 2:42 PM, Adam Russell <[email protected]> wrote:
>> Suppose I want to convert the first col of a PDL::Char to a float. When I do
>> this
>>
>> my $age_col=$self->data->slice(",0:0");
>>
>> I get the first column just fine, it looks like this
>>
>> [
>> [ '39' ]
>> [ '50' ]
>> [ '38' ]
>> [ '53' ]
>> [ '28' ]
>> [ '37' ]
>> [ '49' ]
>> [ '52' ]
>> [ '31' ]
>> [ '42' ]
>> [ '37' ]
>> [ '30' ]
>> [ '23' ]
>> [ '32' ]
>> [ '40' ]
>> [ '34' ]
>> ]
>>
>> but if I try and convert it to a float I get a bunch of gibberish?
>> my $age_col=$self->data->slice(",0:0");
>> $age_col = float $age_col;
>>
>> [
>> [ 'LBdB' ]
>> [ 'TB@B' ]
>> [ 'LB`B' ]
>> [ 'TBLB' ]
>> [ 'HB`B' ]
>> [ 'LB\B' ]
>> [ 'PBdB' ]
>> [ 'TBHB' ]
>> [ 'LBDB' ]
>> [ 'PBHB' ]
>> [ 'LB\B' ]
>> [ 'LB@B' ]
>> [ 'HBLB' ]
>> [ 'LBHB' ]
>> [ 'PB@B' ]
>> [ 'LBPB' ]
>> ]
>>
>>
>> What am I doing wrong?
>> I am using PDL:Char because much of the rest of the columns are indeed
>> Strings and so I thought it wuld make sense to just use PDL::Char to store
>> everything and then selectively convert a column or two to float as needed.
>>
>>
>>
>>
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