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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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