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Source code changes of the file "GENERATED/PDL/Slices.pm" between
PDL-2.077.tar.gz and PDL-2.078.tar.gz

About: PDL (Perl Data Language) aims to turn perl into an efficient numerical language for scientific computing (similar to IDL and MatLab).

[ To the main PDL source changes report ]

Slices.pm  (PDL-2.077):Slices.pm  (PDL-2.078)
skipping to change at line 333 skipping to change at line 333
index2d barfs if either of the index values are bad. index2d barfs if either of the index values are bad.
=cut =cut
#line 364 "Slices.pm" #line 364 "Slices.pm"
#line 1060 "../../blib/lib/PDL/PP.pm" #line 1060 "../../blib/lib/PDL/PP.pm"
*index2d = \&PDL::index2d; *index2d = \&PDL::index2d;
#line 371 "Slices.pm" #line 371 "Slices.pm"
#line 299 "slices.pd" #line 245 "slices.pd"
=head2 indexNDb =head2 indexNDb
=for ref =for ref
Backwards-compatibility alias for indexND Backwards-compatibility alias for indexND
=head2 indexND =head2 indexND
=for ref =for ref
skipping to change at line 383 skipping to change at line 383
PDL, suitable for feeding to this. PDL, suitable for feeding to this.
=cut =cut
sub PDL::indexND { sub PDL::indexND {
my($source,$index, $boundary) = @_; my($source,$index, $boundary) = @_;
return PDL::range($source,$index,undef,$boundary); return PDL::range($source,$index,undef,$boundary);
} }
*PDL::indexNDb = \&PDL::indexND; *PDL::indexNDb = \&PDL::indexND;
#line 426 "Slices.pm" #line 425 "Slices.pm"
#line 352 "slices.pd" #line 297 "slices.pd"
sub PDL::range { sub PDL::range {
my($source,$ind,$sz,$bound) = @_; my($source,$ind,$sz,$bound) = @_;
# Convert to indx type up front (also handled in rangeb if necessary) # Convert to indx type up front (also handled in rangeb if necessary)
my $index = (ref $ind && UNIVERSAL::isa($ind,'PDL') && $ind->type eq 'indx') ? $ind : indx($ind); my $index = (ref $ind && UNIVERSAL::isa($ind,'PDL') && $ind->type eq 'indx') ? $ind : indx($ind);
my $size = defined($sz) ? PDL->pdl($sz) : undef; my $size = defined($sz) ? PDL->pdl($sz) : undef;
# Handle empty PDL case: return a properly constructed Empty. # Handle empty PDL case: return a properly constructed Empty.
if($index->isempty) { if($index->isempty) {
skipping to change at line 423 skipping to change at line 423
$bound = $s; $bound = $s;
} }
elsif($bound !~ m/^[0123ftepx]+$/ && $bound =~ m/^([0123ftepx])/i ) { elsif($bound !~ m/^[0123ftepx]+$/ && $bound =~ m/^([0123ftepx])/i ) {
$bound = $1; $bound = $1;
} }
} }
no warnings; # shut up about passing undef into rangeb no warnings; # shut up about passing undef into rangeb
$source->rangeb($index,$size,$bound); $source->rangeb($index,$size,$bound);
} }
#line 472 "Slices.pm" #line 471 "Slices.pm"
#line 1058 "../../blib/lib/PDL/PP.pm" #line 1058 "../../blib/lib/PDL/PP.pm"
=head2 rangeb =head2 rangeb
=for sig =for sig
Signature: (P(); C(); pdl *ind_pdl; SV *size; SV *boundary_sv) Signature: (P(); C(); pdl *ind_pdl; SV *size; SV *boundary_sv)
=for ref =for ref
skipping to change at line 637 skipping to change at line 637
[0 0 1 1 0] [0 0 1 1 0]
] ]
B<CAVEAT>: It's quite possible to select multiple ranges that B<CAVEAT>: It's quite possible to select multiple ranges that
intersect. In that case, modifying the ranges doesn't have a intersect. In that case, modifying the ranges doesn't have a
guaranteed result in the original PDL -- the result is an arbitrary guaranteed result in the original PDL -- the result is an arbitrary
choice among the valid values. For some things that's OK; but for choice among the valid values. For some things that's OK; but for
others it's not. In particular, this doesn't work: others it's not. In particular, this doesn't work:
pdl> $photon_list = new PDL::RandVar->sample(500)->reshape(2,250)*10 pdl> $photon_list = new PDL::RandVar->sample(500)->reshape(2,250)*10
pdl> histogram = zeroes(10,10) pdl> $histogram = zeroes(10,10)
pdl> histogram->range($photon_list,1)++; #not what you wanted pdl> $histogram->range($photon_list,1)++; #not what you wanted
The reason is that if two photons land in the same bin, then that bin The reason is that if two photons land in the same bin, then that bin
doesn't get incremented twice. (That may get fixed in a later version...) doesn't get incremented twice. (That may get fixed in a later version...)
B<PERMISSIVE RANGING>: If C<$index> has too many dimensions compared B<PERMISSIVE RANGING>: If C<$index> has too many dimensions compared
to C<$source>, then $source is treated as though it had dummy to C<$source>, then $source is treated as though it had dummy
dimensions of size 1, up to the required number of dimensions. These dimensions of size 1, up to the required number of dimensions. These
virtual dummy dimensions have the usual boundary conditions applied to virtual dummy dimensions have the usual boundary conditions applied to
them. them.
skipping to change at line 679 skipping to change at line 679
PDL with every atomic perl operation, even if you only touch a single element. PDL with every atomic perl operation, even if you only touch a single element.
One way to speed up such code is to sever your range, so that PDL One way to speed up such code is to sever your range, so that PDL
doesn't have to copy the data with each operation, then copy the doesn't have to copy the data with each operation, then copy the
elements explicitly at the end of your loop. Here's an example that elements explicitly at the end of your loop. Here's an example that
labels each region in a range sequentially, using many small labels each region in a range sequentially, using many small
operations rather than a single xvals assignment: operations rather than a single xvals assignment:
### How to make a collection of small ops run fast with range... ### How to make a collection of small ops run fast with range...
$x = $data->range($index, $sizes, $bound)->sever; $x = $data->range($index, $sizes, $bound)->sever;
$aa = $data->range($index, $sizes, $bound); $aa = $data->range($index, $sizes, $bound);
map { $x($_ - 1) .= $_; } (1..$x->nelem); # Lots of little ops $x($_ - 1) .= $_ for 1..$x->nelem; # Lots of little ops
$aa .= $x; $aa .= $x;
C<range> is a perl front-end to a PP function, C<rangeb>. Calling C<range> is a perl front-end to a PP function, C<rangeb>. Calling
C<rangeb> is marginally faster but requires that you include all arguments. C<rangeb> is marginally faster but requires that you include all arguments.
DEVEL NOTES DEVEL NOTES
* index broadcast dimensions are effectively clumped internally. This * index broadcast dimensions are effectively clumped internally. This
makes it easier to loop over the index array but a little more brain-bending makes it easier to loop over the index array but a little more brain-bending
to tease out the algorithm. to tease out the algorithm.
=cut =cut
=for bad =for bad
rangeb processes bad values. rangeb processes bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays. It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
=cut =cut
#line 756 "Slices.pm" #line 754 "Slices.pm"
#line 1060 "../../blib/lib/PDL/PP.pm" #line 1060 "../../blib/lib/PDL/PP.pm"
*rangeb = \&PDL::rangeb; *rangeb = \&PDL::rangeb;
#line 763 "Slices.pm" #line 761 "Slices.pm"
#line 1058 "../../blib/lib/PDL/PP.pm" #line 1058 "../../blib/lib/PDL/PP.pm"
=head2 rld =head2 rld
=for sig =for sig
Signature: (indx a(n); b(n); [o]c(m)) Signature: (indx a(n); b(n); [o]c(m))
=for ref =for ref
skipping to change at line 731 skipping to change at line 731
=for example =for example
rld($x,$y,$c=null); rld($x,$y,$c=null);
=for bad =for bad
rld does not process bad values. rld does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays. It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
=cut =cut
#line 797 "Slices.pm" #line 795 "Slices.pm"
#line 1059 "../../blib/lib/PDL/PP.pm" #line 1059 "../../blib/lib/PDL/PP.pm"
sub PDL::rld { sub PDL::rld {
my ($x,$y) = @_; my ($x,$y) = @_;
my ($c); my ($c);
if ($#_ == 2) { if ($#_ == 2) {
$c = $_[2]; $c = $_[2];
} else { } else {
# XXX Need to improve emulation of broadcasting in auto-generating c # XXX Need to improve emulation of broadcasting in auto-generating c
my ($size) = $x->sumover->max->sclr; my ($size) = $x->sumover->max->sclr;
my (@dims) = $x->dims; my (@dims) = $x->dims;
shift @dims; shift @dims;
$c = $y->zeroes($size,@dims); $c = $y->zeroes($size,@dims);
} }
&PDL::_rld_int($x,$y,$c); &PDL::_rld_int($x,$y,$c);
$c; $c;
} }
#line 818 "Slices.pm" #line 816 "Slices.pm"
#line 1060 "../../blib/lib/PDL/PP.pm" #line 1060 "../../blib/lib/PDL/PP.pm"
*rld = \&PDL::rld; *rld = \&PDL::rld;
#line 825 "Slices.pm" #line 823 "Slices.pm"
#line 1058 "../../blib/lib/PDL/PP.pm" #line 1058 "../../blib/lib/PDL/PP.pm"
=head2 rle =head2 rle
=for sig =for sig
Signature: (c(n); indx [o]a(m); [o]b(m)) Signature: (c(n); indx [o]a(m); [o]b(m))
=for ref =for ref
skipping to change at line 808 skipping to change at line 808
$y = $x->cumusumover; $y = $x->cumusumover;
$yprob1x = $y->slice('-1:0')->double / $y->slice('(-1)'); $yprob1x = $y->slice('-1:0')->double / $y->slice('(-1)');
$z = cat($x1, 1 / $yprob1x**$nrolls)->transpose; $z = cat($x1, 1 / $yprob1x**$nrolls)->transpose;
=for bad =for bad
rle does not process bad values. rle does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays. It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
=cut =cut
#line 885 "Slices.pm" #line 883 "Slices.pm"
#line 1059 "../../blib/lib/PDL/PP.pm" #line 1059 "../../blib/lib/PDL/PP.pm"
sub PDL::rle { sub PDL::rle {
my $c = shift; my $c = shift;
my ($x,$y) = @_==2 ? @_ : (null,null); my ($x,$y) = @_==2 ? @_ : (null,null);
PDL::_rle_int($c,$x,$y); PDL::_rle_int($c,$x,$y);
my $max_ind = ($c->ndims<2) ? ($x!=0)->sumover-1 : my $max_ind = ($c->ndims<2) ? ($x!=0)->sumover-1 :
($x!=0)->clump(1..$x->ndims-1)->sumover->max->sc lr-1; ($x!=0)->clump(1..$x->ndims-1)->sumover->max->sc lr-1;
return ($x->slice("0:$max_ind"),$y->slice("0:$max_ind")); return ($x->slice("0:$max_ind"),$y->slice("0:$max_ind"));
} }
#line 899 "Slices.pm" #line 897 "Slices.pm"
#line 1060 "../../blib/lib/PDL/PP.pm" #line 1060 "../../blib/lib/PDL/PP.pm"
*rle = \&PDL::rle; *rle = \&PDL::rle;
#line 906 "Slices.pm" #line 904 "Slices.pm"
#line 1060 "../../blib/lib/PDL/PP.pm" #line 1060 "../../blib/lib/PDL/PP.pm"
*_clump_int = \&PDL::_clump_int; *_clump_int = \&PDL::_clump_int;
#line 913 "Slices.pm" #line 911 "Slices.pm"
#line 1058 "../../blib/lib/PDL/PP.pm" #line 1058 "../../blib/lib/PDL/PP.pm"
=head2 xchg =head2 xchg
=for sig =for sig
Signature: (P(); C(); PDL_Indx n1; PDL_Indx n2) Signature: (P(); C(); PDL_Indx n1; PDL_Indx n2)
=for ref =for ref
skipping to change at line 863 skipping to change at line 863
are exchanged with each other i.e. are exchanged with each other i.e.
$y->at(5,3,2,8) == $x->at(5,3,8,2) $y->at(5,3,2,8) == $x->at(5,3,8,2)
=for bad =for bad
xchg does not process bad values. xchg does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays. It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
=cut =cut
#line 953 "Slices.pm" #line 951 "Slices.pm"
#line 1060 "../../blib/lib/PDL/PP.pm" #line 1060 "../../blib/lib/PDL/PP.pm"
*xchg = \&PDL::xchg; *xchg = \&PDL::xchg;
#line 960 "Slices.pm" #line 958 "Slices.pm"
#line 1327 "slices.pd" #line 1269 "slices.pd"
=head2 reorder =head2 reorder
=for ref =for ref
Re-orders the dimensions of a PDL based on the supplied list. Re-orders the dimensions of a PDL based on the supplied list.
Similar to the L</xchg> method, this method re-orders the dimensions Similar to the L</xchg> method, this method re-orders the dimensions
of a PDL. While the L</xchg> method swaps the position of two dimensions, of a PDL. While the L</xchg> method swaps the position of two dimensions,
the reorder method can change the positions of many dimensions at the reorder method can change the positions of many dimensions at
skipping to change at line 990 skipping to change at line 990
my $errString = "PDL::reorder: Dim index $newDimOrder[$i] out of r ange in position $i\n(range is 0-$#newDimOrder)"; my $errString = "PDL::reorder: Dim index $newDimOrder[$i] out of r ange in position $i\n(range is 0-$#newDimOrder)";
barf($errString); barf($errString);
} }
} }
# Checking that they are all present and also not duplicated is done by broadcast() [I think] # Checking that they are all present and also not duplicated is done by broadcast() [I think]
# a quicker way to do the reorder # a quicker way to do the reorder
return $pdl->broadcast(@newDimOrder)->unbroadcast(0); return $pdl->broadcast(@newDimOrder)->unbroadcast(0);
} }
#line 1085 "Slices.pm" #line 1083 "Slices.pm"
#line 1058 "../../blib/lib/PDL/PP.pm" #line 1058 "../../blib/lib/PDL/PP.pm"
=head2 mv =head2 mv
=for sig =for sig
Signature: (P(); C(); PDL_Indx n1; PDL_Indx n2) Signature: (P(); C(); PDL_Indx n1; PDL_Indx n2)
=for ref =for ref
skipping to change at line 1024 skipping to change at line 1024
The other dimensions are moved accordingly. The other dimensions are moved accordingly.
Negative dimension indices count from the end. Negative dimension indices count from the end.
=for bad =for bad
mv does not process bad values. mv does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays. It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
=cut =cut
#line 1125 "Slices.pm" #line 1123 "Slices.pm"
#line 1060 "../../blib/lib/PDL/PP.pm" #line 1060 "../../blib/lib/PDL/PP.pm"
*mv = \&PDL::mv; *mv = \&PDL::mv;
#line 1132 "Slices.pm" #line 1130 "Slices.pm"
#line 1503 "slices.pd" #line 1445 "slices.pd"
=head2 using =head2 using
=for ref =for ref
Returns array of column numbers requested Returns array of column numbers requested
=for usage =for usage
line $pdl->using(1,2); line $pdl->using(1,2);
skipping to change at line 1061 skipping to change at line 1061
*using = \&PDL::using; *using = \&PDL::using;
sub PDL::using { sub PDL::using {
my ($x,@ind)=@_; my ($x,@ind)=@_;
@ind = list $ind[0] if (blessed($ind[0]) && $ind[0]->isa('PDL')); @ind = list $ind[0] if (blessed($ind[0]) && $ind[0]->isa('PDL'));
foreach (@ind) { foreach (@ind) {
$_ = $x->slice("($_)"); $_ = $x->slice("($_)");
} }
@ind; @ind;
} }
#line 1167 "Slices.pm" #line 1165 "Slices.pm"
#line 1058 "../../blib/lib/PDL/PP.pm" #line 1058 "../../blib/lib/PDL/PP.pm"
=head2 diagonal =head2 diagonal
=for sig =for sig
Signature: (P(); C(); PDL_Indx whichdims[]) Signature: (P(); C(); PDL_Indx whichdims[])
=for ref =for ref
skipping to change at line 1121 skipping to change at line 1121
[0 0 1] [0 0 1]
] ]
] ]
=for bad =for bad
diagonal does not process bad values. diagonal does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays. It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
=cut =cut
#line 1233 "Slices.pm" #line 1231 "Slices.pm"
#line 1059 "../../blib/lib/PDL/PP.pm" #line 1059 "../../blib/lib/PDL/PP.pm"
sub PDL::diagonal { shift->_diagonal_int(my $o=PDL->null, \@_); $o } sub PDL::diagonal { shift->_diagonal_int(my $o=PDL->null, \@_); $o }
#line 1240 "Slices.pm" #line 1238 "Slices.pm"
#line 1060 "../../blib/lib/PDL/PP.pm" #line 1060 "../../blib/lib/PDL/PP.pm"
*diagonal = \&PDL::diagonal; *diagonal = \&PDL::diagonal;
#line 1247 "Slices.pm" #line 1245 "Slices.pm"
#line 1058 "../../blib/lib/PDL/PP.pm" #line 1058 "../../blib/lib/PDL/PP.pm"
=head2 lags =head2 lags
=for sig =for sig
Signature: (P(); C(); PDL_Indx nthdim;PDL_Indx step;PDL_Indx n) Signature: (P(); C(); PDL_Indx nthdim;PDL_Indx step;PDL_Indx n)
=for ref =for ref
skipping to change at line 1179 skipping to change at line 1179
C<$step> and C<$nlags> must be positive. C<$nthdim> can be C<$step> and C<$nlags> must be positive. C<$nthdim> can be
negative and will then be counted from the last dim backwards negative and will then be counted from the last dim backwards
in the usual way (-1 = last dim). in the usual way (-1 = last dim).
=for bad =for bad
lags does not process bad values. lags does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays. It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
=cut =cut
#line 1301 "Slices.pm" #line 1299 "Slices.pm"
#line 1060 "../../blib/lib/PDL/PP.pm" #line 1060 "../../blib/lib/PDL/PP.pm"
*lags = \&PDL::lags; *lags = \&PDL::lags;
#line 1308 "Slices.pm" #line 1306 "Slices.pm"
#line 1058 "../../blib/lib/PDL/PP.pm" #line 1058 "../../blib/lib/PDL/PP.pm"
=head2 splitdim =head2 splitdim
=for sig =for sig
Signature: (P(); C(); PDL_Indx nthdim;PDL_Indx nsp) Signature: (P(); C(); PDL_Indx nthdim;PDL_Indx nsp)
=for ref =for ref
skipping to change at line 1218 skipping to change at line 1218
$y->at(6,4,m,n,3,6) == $x->at(6,4,m+3*n) $y->at(6,4,m,n,3,6) == $x->at(6,4,m+3*n)
is always true (C<m> has to be less than 3). is always true (C<m> has to be less than 3).
=for bad =for bad
splitdim does not process bad values. splitdim does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays. It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
=cut =cut
#line 1348 "Slices.pm" #line 1346 "Slices.pm"
#line 1060 "../../blib/lib/PDL/PP.pm" #line 1060 "../../blib/lib/PDL/PP.pm"
*splitdim = \&PDL::splitdim; *splitdim = \&PDL::splitdim;
#line 1355 "Slices.pm" #line 1353 "Slices.pm"
#line 1058 "../../blib/lib/PDL/PP.pm" #line 1058 "../../blib/lib/PDL/PP.pm"
=head2 rotate =head2 rotate
=for sig =for sig
Signature: (x(n); indx shift(); [oca]y(n)) Signature: (x(n); indx shift(); [oca]y(n))
=for ref =for ref
Shift vector elements along with wrap. Flows data back&forth. Shift vector elements along with wrap. Flows data back&forth.
=for bad =for bad
rotate does not process bad values. rotate does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays. It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
=cut =cut
#line 1381 "Slices.pm" #line 1379 "Slices.pm"
#line 1060 "../../blib/lib/PDL/PP.pm" #line 1060 "../../blib/lib/PDL/PP.pm"
*rotate = \&PDL::rotate; *rotate = \&PDL::rotate;
#line 1388 "Slices.pm" #line 1386 "Slices.pm"
#line 1058 "../../blib/lib/PDL/PP.pm" #line 1058 "../../blib/lib/PDL/PP.pm"
=head2 broadcastI =head2 broadcastI
=for sig =for sig
Signature: (P(); C(); PDL_Indx id; PDL_Indx whichdims[]) Signature: (P(); C(); PDL_Indx id; PDL_Indx whichdims[])
=for ref =for ref
skipping to change at line 1274 skipping to change at line 1274
=for example =for example
$y = $x->broadcastI(0,1,5); # broadcast over dims 1,5 in id 1 $y = $x->broadcastI(0,1,5); # broadcast over dims 1,5 in id 1
=for bad =for bad
broadcastI does not process bad values. broadcastI does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays. It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
=cut =cut
#line 1421 "Slices.pm" #line 1419 "Slices.pm"
#line 1060 "../../blib/lib/PDL/PP.pm" #line 1060 "../../blib/lib/PDL/PP.pm"
*broadcastI = \&PDL::broadcastI; *broadcastI = \&PDL::broadcastI;
#line 1428 "Slices.pm" #line 1426 "Slices.pm"
#line 1058 "../../blib/lib/PDL/PP.pm" #line 1058 "../../blib/lib/PDL/PP.pm"
=head2 unbroadcast =head2 unbroadcast
=for sig =for sig
Signature: (P(); C(); int atind) Signature: (P(); C(); int atind)
=for ref =for ref
skipping to change at line 1301 skipping to change at line 1301
All broadcasted dimensions are made real again. All broadcasted dimensions are made real again.
See [TBD Doc] for details and examples. See [TBD Doc] for details and examples.
=for bad =for bad
unbroadcast does not process bad values. unbroadcast does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays. It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
=cut =cut
#line 1456 "Slices.pm" #line 1454 "Slices.pm"
#line 1060 "../../blib/lib/PDL/PP.pm" #line 1060 "../../blib/lib/PDL/PP.pm"
*unbroadcast = \&PDL::unbroadcast; *unbroadcast = \&PDL::unbroadcast;
#line 1463 "Slices.pm" #line 1461 "Slices.pm"
#line 1948 "slices.pd" #line 1890 "slices.pd"
=head2 dice =head2 dice
=for ref =for ref
Dice rows/columns/planes out of a PDL using indexes for Dice rows/columns/planes out of a PDL using indexes for
each dimension. each dimension.
This function can be used to extract irregular subsets This function can be used to extract irregular subsets
along many dimension of a PDL, e.g. only certain rows in an image, along many dimension of a PDL, e.g. only certain rows in an image,
skipping to change at line 1458 skipping to change at line 1458
=cut =cut
sub PDL::dice_axis { sub PDL::dice_axis {
my($self,$axis,$idx) = @_; my($self,$axis,$idx) = @_;
my $ix = PDL->topdl($idx); my $ix = PDL->topdl($idx);
barf("dice_axis: index must be <=1D") if $ix->getndims > 1; barf("dice_axis: index must be <=1D") if $ix->getndims > 1;
return $self->mv($axis,0)->index1d($ix)->mv(0,$axis); return $self->mv($axis,0)->index1d($ix)->mv(0,$axis);
} }
*dice_axis = \&PDL::dice_axis; *dice_axis = \&PDL::dice_axis;
#line 1619 "Slices.pm" #line 1617 "Slices.pm"
#line 1058 "../../blib/lib/PDL/PP.pm" #line 1058 "../../blib/lib/PDL/PP.pm"
=head2 slice =head2 slice
=for sig =for sig
Signature: (P(); C(); pdl_slice_args *arglist) Signature: (P(); C(); pdl_slice_args *arglist)
=for usage =for usage
skipping to change at line 1629 skipping to change at line 1629
$x->slice([1,3]); # Same as above three calls, but using array ref syntax $x->slice([1,3]); # Same as above three calls, but using array ref syntax
$x->slice([3,1]); $x->slice([3,1]);
$x->slice([-2,1]); $x->slice([-2,1]);
=for bad =for bad
slice does not process bad values. slice does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays. It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
=cut =cut
#line 1797 "Slices.pm" #line 1795 "Slices.pm"
#line 1059 "../../blib/lib/PDL/PP.pm" #line 1059 "../../blib/lib/PDL/PP.pm"
sub PDL::slice { sub PDL::slice {
my ($source, @others) = @_; my ($source, @others) = @_;
for my $i(0..$#others) { for my $i(0..$#others) {
my $idx = $others[$i]; my $idx = $others[$i];
if (ref $idx eq 'ARRAY') { if (ref $idx eq 'ARRAY') {
my @arr = map UNIVERSAL::isa($_, 'PDL') ? $_->flat->at(0) : $_, @{$other s[$i]}; my @arr = map UNIVERSAL::isa($_, 'PDL') ? $_->flat->at(0) : $_, @{$other s[$i]};
$others[$i] = \@arr; $others[$i] = \@arr;
skipping to change at line 1669 skipping to change at line 1669
$others[$i] = $idx->flat->at(0); $others[$i] = $idx->flat->at(0);
} }
else { else {
#### Zero elements -- force an extended empty. #### Zero elements -- force an extended empty.
$others[$i] = "1:0:1"; $others[$i] = "1:0:1";
} }
} }
PDL::_slice_int($source,my $o=$source->initialize,\@others); PDL::_slice_int($source,my $o=$source->initialize,\@others);
$o; $o;
} }
#line 1839 "Slices.pm" #line 1837 "Slices.pm"
#line 1060 "../../blib/lib/PDL/PP.pm" #line 1060 "../../blib/lib/PDL/PP.pm"
*slice = \&PDL::slice; *slice = \&PDL::slice;
#line 1846 "Slices.pm" #line 1844 "Slices.pm"
#line 2439 "slices.pd" #line 2381 "slices.pd"
=head1 BUGS =head1 BUGS
For the moment, you can't slice one of the zero-length dims of an For the moment, you can't slice one of the zero-length dims of an
empty ndarray. It is not clear how to implement this in a way that makes empty ndarray. It is not clear how to implement this in a way that makes
sense. sense.
Many types of index errors are reported far from the indexing Many types of index errors are reported far from the indexing
operation that caused them. This is caused by the underlying architecture: operation that caused them. This is caused by the underlying architecture:
slice() sets up a mapping between variables, but that mapping isn't slice() sets up a mapping between variables, but that mapping isn't
skipping to change at line 1701 skipping to change at line 1701
Copyright (C) 1997 Tuomas J. Lukka. Contributions by Copyright (C) 1997 Tuomas J. Lukka. Contributions by
Craig DeForest, deforest@boulder.swri.edu. Craig DeForest, deforest@boulder.swri.edu.
Documentation contributions by David Mertens. Documentation contributions by David Mertens.
All rights reserved. There is no warranty. You are allowed All rights reserved. There is no warranty. You are allowed
to redistribute this software / documentation under certain to redistribute this software / documentation under certain
conditions. For details, see the file COPYING in the PDL conditions. For details, see the file COPYING in the PDL
distribution. If this file is separated from the PDL distribution, distribution. If this file is separated from the PDL distribution,
the copyright notice should be included in the file. the copyright notice should be included in the file.
=cut =cut
#line 1878 "Slices.pm" #line 1876 "Slices.pm"
# Exit with OK status # Exit with OK status
1; 1;
 End of changes. 43 change blocks. 
44 lines changed or deleted 44 lines changed or added
To the Perl Modules section of the PDL source changes report or the top of this page
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