"Fossies" - the Fresh Open Source Software Archive  

Source code changes of the file "Basic/Pod/Indexing.pod" between
PDL-2.078.tar.gz and PDL-2.079.tar.gz

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

Indexing.pod  (PDL-2.078)	:	Indexing.pod  (PDL-2.079)
skipping to change at line 1251		skipping to change at line 1251
usage of the former:		usage of the former:
[ # ** this is the worst possible example to start with ]		[ # ** this is the worst possible example to start with ]
# but can be used to show that $mat += $line is different from		# but can be used to show that $mat += $line is different from
# $mat->broadcast(0) += $line		# $mat->broadcast(0) += $line
# explicit broadcasting to add a vector to each column of a matrix		# explicit broadcasting to add a vector to each column of a matrix
pdl> $mat = zeroes(4,3)		pdl> $mat = zeroes(4,3)
pdl> $line = pdl (3.1416,2,-2)		pdl> $line = pdl (3.1416,2,-2)
pdl> ($tmp = $mat->broadcast(0)) += $line		pdl> ($tmp = $mat->broadcast(0)) += $line
In this example, C<$mat-E<gt>broadcast(0)> tells PDL that you want the second		In this example, C<< $mat->broadcast(0) >> tells PDL that you want the second
dimension of this ndarray to be broadcast over first leading to a broadcast		dimension of this ndarray to be broadcast over first leading to a broadcast
loop that can be expressed as		loop that can be expressed as
for (j=0; j<3; j++) {		for (j=0; j<3; j++) {
for (i=0; i<4; i++) {		for (i=0; i<4; i++) {
mat(i,j) += src(j);		mat(i,j) += src(j);
}		}
}		}
C<broadcast> takes a list of numbers as arguments which explicitly		C<broadcast> takes a list of numbers as arguments which explicitly
End of changes. 1 change blocks.
1 lines changed or deleted		1 lines changed or added

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