An idea I had from working some of the PDL::Matlab
features was supporting a string argument to pdl
which would evaluate the input data according to
matlab rules, so:
$a = pdl <<EOPDL;
[
[1 0 8]
[6 3 5]
[3 0 5]
[2 4 2]
]
EOPDL
would be one way to do this. The nice thing about
this extension is that it could be done without
breaking existing code (I think) and it would support
better interoperability with Matlab and Octave as
well as easier cut-and-paste of examples.
--Chris
On 4/16/2010 4:48 PM, Doug Hunt wrote:
> Hi Derek: I think setting $PDL::use_commas=1 might help. This will
> insert commas when printing the PDL, allowing it to be cut and pasted more
> easily:
>
> perldl> $PDL::use_commas=1
> perldl> p ones(10,10)
>
> [
> [1,1,1,1,1,1,1,1,1,1],
> [1,1,1,1,1,1,1,1,1,1],
> [1,1,1,1,1,1,1,1,1,1],
> [1,1,1,1,1,1,1,1,1,1],
> [1,1,1,1,1,1,1,1,1,1],
> [1,1,1,1,1,1,1,1,1,1],
> [1,1,1,1,1,1,1,1,1,1],
> [1,1,1,1,1,1,1,1,1,1],
> [1,1,1,1,1,1,1,1,1,1],
> [1,1,1,1,1,1,1,1,1,1]
> ]
>
> --Doug
>
> [email protected]
> Software Engineer
> UCAR - COSMIC, Tel. (303) 497-2611
>
> On Fri, 16 Apr 2010, Derek Lamb wrote:
>
>> I'm playing with the data from earlier today, the piddle:
>>
>> [
>> [1 0 8]
>> [6 3 5]
>> [3 0 5]
>> [2 4 2]
>> ]
>>
>>
>> Trying to get it into a piddle by copying and pasting the output from
>> the email. Starting with a simple 1D case:
>>
>> perldl> print pdl(1,0,8) #print the piddle
>> [1 0 8]
>> perldl> p pdl([1 0 8]) #use printed output to make new piddle
>> Number found where operator expected at (eval 179) line 4, near "1 0"
>> (Missing operator before 0?)
>> Number found where operator expected at (eval 179) line 4, near "0 8"
>> (Missing operator before 8?)
>> syntax error at (eval 179) line 4, near "1 0"
>>
>>
>>
>> OK, fine, I need some quotes:
>>
>> perldl> p pdl qw[1 0 8]
>> [1 0 8]
>>
>>
>> But how to do the 2D case? About the closest I can get is this:
>>
>> perldl> p pdl qw[
>> ..[> [1 0 8]
>> ..[> [6 3 5]
>> ..[> [3 0 5]
>> ..[> [2 4 2]
>> ..[> ]
>> [0 0 8 0 3 5 0 0 5 0 4 2]
>>
>>
>> It comes out 1D, and the first column is all zeroes. Any tricks for
>> making it come out 2D, or any ideas why the first column is all zeroes?
>>
>> cheers,
>> Derek
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