Hmmmm... thats interesting moklevat.... When I do what you did I get a non truncated numbers! I did a few tests and take a look at this:
[njs@localhost Shu_Hardness_Ratios]$ perldl
perlDL shell v1.33
 PDL comes with ABSOLUTELY NO WARRANTY. For details, see the file
 'COPYING' in the PDL distribution. This is free software and you
 are welcome to redistribute it under certain conditions, see
 the same file for details.
ReadLines, NiceSlice, MultiLines  enabled
Reading PDL/default.perldlrc...
Found docs database /usr/lib64/perl5/site_perl/5.8.8/x86_64-linux-thre
+ad-multi/PDL/pdldoc.db
Type 'help' for online help
Type 'demo' for online demos
Loaded PDL v2.4.3

Note: AutoLoader not enabled ('use PDL::AutoLoader' recommended)

perldl> $x=50137.685706
perldl> print $x
50137.685706

perldl> $x=pdl(50137.685706)
perldl> print $x
50137.685706

perldl> $x=zeroes(1)
perldl> use PDL::NiceSlice
perldl> $x(0) .= 50137.685706
perldl> print $x
[ 50137.686]

perldl> $x = rcols "bursts.txt"
Reading data into piddles of type: [ Double ]
Read in  33  elements.
perldl> print $x
[ 50093.199  50094.308  50954.953  51767.383  51958.219  52005.696  52
+005.763  52142.188  52422.043  52459.414  52482.509  52693.953  52752
+.918  52836.803  52837.198  53107.974  53125.429   53141.53  53198.49
+5  53243.578  53489.381  53603.709   53661.37  53724.982  53724.983  
+53864.724  53882.002  53969.248  54224.674  54225.636  54304.474  543
+04.539  54366.513]

[download]
So if you type the number in straight its no problem, but if you read it from a file using rcols, or if you define a piddle and then put the number into the pre-existing piddle, then it truncates the number! I wonder why it does this?
In the PDL manual 'double' is the biggest data type listed so I on;y really understand why creating a piddle with this number in works one way and not another - or how to fix it.
I'd love to give you an example of the previous code it was failing in but I've re-written that with my aforementioned inelegant work around.

In reply to Re^2: PDL datatype by nickschurch
in thread PDL datatype by nickschurch

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