Chris: you are right. I am being stupid. Yes, selecting ((0)) yields the first row of the file, which is exactly what Louis was complaining about. So the documentation is correct.
On Jun 7, 2012, at 10:27 AM, Chris Marshall wrote: > Hi Craig- > > The confusion is between columns in the piddle > and columns in the data file. dim(0) of the piddle > corresponds to a going down the column in the > data file: > >> pdl> #cat test3x4 >> 0 3 6 9 >> 1 4 7 10 >> 2 5 8 11 >> >> pdl> $a = rcols 'test3x4', [] >> Reading data into piddles of type: [ Double ] >> Read in 12 elements. >> >> pdl> p $a >> >> [ >> [ 0 1 2] >> [ 3 4 5] >> [ 6 7 8] >> [ 9 10 11] >> ] >> >> pdl> p sequence(3,4) >> >> [ >> [ 0 1 2] >> [ 3 4 5] >> [ 6 7 8] >> [ 9 10 11] >> ] >> >> pdl> @aa = rcols 'test3x4' >> Reading data into piddles of type: [ Double Double Double Double ] >> Read in 3 elements. >> >> pdl> p @aa[0..3] >> [0 1 2] [3 4 5] [6 7 8] [9 10 11] > > --Chris > > On Thu, Jun 7, 2012 at 12:04 PM, Craig DeForest > <defor...@boulder.swri.edu> wrote: >> Chris, see my example that reproduces the old behavior with the latest git - >> dim(0) running across column within a row and dim(1) running across row >> within a column. >> >> Cheers, >> Craig >> >> On Jun 7, 2012, at 9:49 AM, Chris Marshall wrote: >> >>> There was a brief period where the 2D array >>> support in rcols had different behavior for a >>> single column specification versus the new >>> 2D array ref specification. >>> >>> That has been corrected so that dim(0) is >>> *always* the data down the column and >>> thus, the 2D piddles have dim(1) running >>> *across* the columns selected. >>> >>> As far as I know, the documentation is correct >>> as written for PDL-2.4.11. >>> >>> --Chris >>> >>> On Thu, Jun 7, 2012 at 10:13 AM, Louis Chaillet >>> <louis.chail...@gmail.com> wrote: >>>> Hi, just a quick question. >>>> >>>> I noticed that the order of the dimensions of a piddle that I read from >>>> file >>>> with rcols seem to have changed from Perl release 5.10.1 to 5.14.2. >>>> >>>> It may have changed in between, but those are the versions I have. In the >>>> earlier version the first dimension was over the rows of the file. In the >>>> second it is over the columns of the file. >>>> >>>> Is this correct, or am I missing something? If it is correct what was the >>>> first version with the first dimension over the columns of the file? >>>> >>>> Kind regards, Louis >>>> >>>> _______________________________________________ >>>> Perldl mailing list >>>> Perldl@jach.hawaii.edu >>>> http://mailman.jach.hawaii.edu/mailman/listinfo/perldl >>>> >>> >>> _______________________________________________ >>> Perldl mailing list >>> Perldl@jach.hawaii.edu >>> http://mailman.jach.hawaii.edu/mailman/listinfo/perldl >>> >> > _______________________________________________ Perldl mailing list Perldl@jach.hawaii.edu http://mailman.jach.hawaii.edu/mailman/listinfo/perldl
