line |
stmt |
bran |
cond |
sub |
pod |
time |
code |
1
|
|
|
|
|
|
|
package Data::Frame; |
2
|
|
|
|
|
|
|
# ABSTRACT: data frame implementation |
3
|
|
|
|
|
|
|
$Data::Frame::VERSION = '0.003'; |
4
|
5
|
|
|
5
|
|
216082
|
use strict; |
|
5
|
|
|
|
|
8
|
|
|
5
|
|
|
|
|
149
|
|
5
|
5
|
|
|
5
|
|
18
|
use warnings; |
|
5
|
|
|
|
|
5
|
|
|
5
|
|
|
|
|
94
|
|
6
|
|
|
|
|
|
|
|
7
|
5
|
|
|
5
|
|
2383
|
use Tie::IxHash; |
|
5
|
|
|
|
|
17061
|
|
|
5
|
|
|
|
|
820
|
|
8
|
5
|
|
|
5
|
|
1694
|
use Tie::IxHash::Extension; |
|
0
|
|
|
|
|
|
|
|
0
|
|
|
|
|
|
|
9
|
|
|
|
|
|
|
use PDL::Lite; |
10
|
|
|
|
|
|
|
use Data::Perl (); |
11
|
|
|
|
|
|
|
use List::AllUtils; |
12
|
|
|
|
|
|
|
use Try::Tiny; |
13
|
|
|
|
|
|
|
use PDL::SV; |
14
|
|
|
|
|
|
|
use PDL::StringfiableExtension; |
15
|
|
|
|
|
|
|
use Carp; |
16
|
|
|
|
|
|
|
use Scalar::Util qw(blessed); |
17
|
|
|
|
|
|
|
|
18
|
|
|
|
|
|
|
use Text::Table::Tiny; |
19
|
|
|
|
|
|
|
|
20
|
|
|
|
|
|
|
use Data::Frame::Column::Helper; |
21
|
|
|
|
|
|
|
|
22
|
|
|
|
|
|
|
use overload ( |
23
|
|
|
|
|
|
|
'""' => \&Data::Frame::string, |
24
|
|
|
|
|
|
|
'==' => \&Data::Frame::equal, |
25
|
|
|
|
|
|
|
'eq' => \&Data::Frame::equal, |
26
|
|
|
|
|
|
|
); |
27
|
|
|
|
|
|
|
|
28
|
|
|
|
|
|
|
{ |
29
|
|
|
|
|
|
|
# TODO temporary column role |
30
|
|
|
|
|
|
|
no strict; |
31
|
|
|
|
|
|
|
*PDL::number_of_rows = sub { $_[0]->getdim(0) }; |
32
|
|
|
|
|
|
|
*Data::Perl::Collection::Array::number_of_rows = sub { $_[0]->count }; |
33
|
|
|
|
|
|
|
} |
34
|
|
|
|
|
|
|
|
35
|
|
|
|
|
|
|
use Moo; |
36
|
|
|
|
|
|
|
with 'MooX::Traits'; |
37
|
|
|
|
|
|
|
|
38
|
|
|
|
|
|
|
sub _trait_namespace { 'Data::Frame::Role' } # override for MooX::Traits |
39
|
|
|
|
|
|
|
|
40
|
|
|
|
|
|
|
has _columns => ( is => 'ro', default => sub { Tie::IxHash->new; } ); |
41
|
|
|
|
|
|
|
|
42
|
|
|
|
|
|
|
has _row_names => ( is => 'rw', predicate => 1 ); |
43
|
|
|
|
|
|
|
|
44
|
|
|
|
|
|
|
sub BUILD { |
45
|
|
|
|
|
|
|
my ($self, $args) = @_; |
46
|
|
|
|
|
|
|
my $colspec = delete $args->{columns}; |
47
|
|
|
|
|
|
|
|
48
|
|
|
|
|
|
|
if( defined $colspec ) { |
49
|
|
|
|
|
|
|
my @columns = |
50
|
|
|
|
|
|
|
ref $colspec eq 'HASH' |
51
|
|
|
|
|
|
|
? map { ($_, $colspec->{$_} ) } sort { $a cmp $b } keys %$colspec |
52
|
|
|
|
|
|
|
: @$colspec; |
53
|
|
|
|
|
|
|
$self->add_columns(@columns); |
54
|
|
|
|
|
|
|
} |
55
|
|
|
|
|
|
|
} |
56
|
|
|
|
|
|
|
|
57
|
|
|
|
|
|
|
sub string { |
58
|
|
|
|
|
|
|
my ($self) = @_; |
59
|
|
|
|
|
|
|
my $rows = []; |
60
|
|
|
|
|
|
|
push @$rows, [ '', @{ $self->column_names } ]; |
61
|
|
|
|
|
|
|
for my $r_idx ( 0..$self->number_of_rows-1 ) { |
62
|
|
|
|
|
|
|
my $r = [ |
63
|
|
|
|
|
|
|
$self->row_names->slice($r_idx)->squeeze->string, |
64
|
|
|
|
|
|
|
map { |
65
|
|
|
|
|
|
|
my $col = $self->nth_column($_); |
66
|
|
|
|
|
|
|
$col->slice($r_idx)->squeeze->string |
67
|
|
|
|
|
|
|
} 0..$self->number_of_columns-1 ]; |
68
|
|
|
|
|
|
|
push @$rows, $r; |
69
|
|
|
|
|
|
|
} |
70
|
|
|
|
|
|
|
{ |
71
|
|
|
|
|
|
|
# clear column separators |
72
|
|
|
|
|
|
|
local $Text::Table::Tiny::COLUMN_SEPARATOR = ''; |
73
|
|
|
|
|
|
|
local $Text::Table::Tiny::CORNER_MARKER = ''; |
74
|
|
|
|
|
|
|
|
75
|
|
|
|
|
|
|
Text::Table::Tiny::table(rows => $rows, header_row => 1) |
76
|
|
|
|
|
|
|
} |
77
|
|
|
|
|
|
|
} |
78
|
|
|
|
|
|
|
|
79
|
|
|
|
|
|
|
sub number_of_columns { |
80
|
|
|
|
|
|
|
my ($self) = @_; |
81
|
|
|
|
|
|
|
$self->_columns->Length; |
82
|
|
|
|
|
|
|
} |
83
|
|
|
|
|
|
|
|
84
|
|
|
|
|
|
|
sub number_of_rows { |
85
|
|
|
|
|
|
|
my ($self) = @_; |
86
|
|
|
|
|
|
|
if( $self->number_of_columns ) { |
87
|
|
|
|
|
|
|
return $self->nth_column(0)->number_of_rows; |
88
|
|
|
|
|
|
|
} |
89
|
|
|
|
|
|
|
0; |
90
|
|
|
|
|
|
|
} |
91
|
|
|
|
|
|
|
|
92
|
|
|
|
|
|
|
# supports negative indices |
93
|
|
|
|
|
|
|
sub nth_column { |
94
|
|
|
|
|
|
|
my ($self, $index) = @_; |
95
|
|
|
|
|
|
|
confess "requires index" unless defined $index; |
96
|
|
|
|
|
|
|
confess "column index out of bounds" if $index >= $self->number_of_columns; |
97
|
|
|
|
|
|
|
# fine if $index < 0 because negative indices are supported |
98
|
|
|
|
|
|
|
$self->_columns->Values( $index ); |
99
|
|
|
|
|
|
|
} |
100
|
|
|
|
|
|
|
|
101
|
|
|
|
|
|
|
sub column_names { |
102
|
|
|
|
|
|
|
my ($self, @colnames) = @_; |
103
|
|
|
|
|
|
|
if( @colnames ) { |
104
|
|
|
|
|
|
|
try { |
105
|
|
|
|
|
|
|
$self->_columns->RenameKeys( @colnames ); |
106
|
|
|
|
|
|
|
} catch { |
107
|
|
|
|
|
|
|
confess "incorrect number of column names" if /@{[ Tie::IxHash::ERROR_KEY_LENGTH_MISMATCH ]}/; |
108
|
|
|
|
|
|
|
}; |
109
|
|
|
|
|
|
|
} |
110
|
|
|
|
|
|
|
[ $self->_columns->Keys ]; |
111
|
|
|
|
|
|
|
} |
112
|
|
|
|
|
|
|
|
113
|
|
|
|
|
|
|
sub row_names { |
114
|
|
|
|
|
|
|
my ($self, @rest) = @_; |
115
|
|
|
|
|
|
|
if( @rest ) { |
116
|
|
|
|
|
|
|
# setting row names |
117
|
|
|
|
|
|
|
my $new_rows; |
118
|
|
|
|
|
|
|
if( ref $rest[0] ) { |
119
|
|
|
|
|
|
|
if( ref $rest[0] eq 'ARRAY' ) { |
120
|
|
|
|
|
|
|
$new_rows = Data::Perl::array( @{ $rest[0] }); |
121
|
|
|
|
|
|
|
} elsif( $rest[0]->isa('PDL') ) { |
122
|
|
|
|
|
|
|
# TODO just run uniq? |
123
|
|
|
|
|
|
|
$new_rows = Data::Perl::array( @{ $rest[0]->unpdl } ); |
124
|
|
|
|
|
|
|
} else { |
125
|
|
|
|
|
|
|
$new_rows = Data::Perl::array(@rest); |
126
|
|
|
|
|
|
|
} |
127
|
|
|
|
|
|
|
} else { |
128
|
|
|
|
|
|
|
$new_rows = Data::Perl::array(@rest); |
129
|
|
|
|
|
|
|
} |
130
|
|
|
|
|
|
|
|
131
|
|
|
|
|
|
|
confess "invalid row names length" |
132
|
|
|
|
|
|
|
if $self->number_of_rows != $new_rows->count; |
133
|
|
|
|
|
|
|
confess "non-unique row names" |
134
|
|
|
|
|
|
|
if $new_rows->count != $new_rows->uniq->count; |
135
|
|
|
|
|
|
|
|
136
|
|
|
|
|
|
|
return $self->_row_names( PDL::SV->new($new_rows) ); |
137
|
|
|
|
|
|
|
} |
138
|
|
|
|
|
|
|
if( not $self->_has_row_names ) { |
139
|
|
|
|
|
|
|
# if it has never been set before |
140
|
|
|
|
|
|
|
return sequence($self->number_of_rows); |
141
|
|
|
|
|
|
|
} |
142
|
|
|
|
|
|
|
# else, if row_names has been set |
143
|
|
|
|
|
|
|
return $self->_row_names; |
144
|
|
|
|
|
|
|
} |
145
|
|
|
|
|
|
|
|
146
|
|
|
|
|
|
|
sub _make_actual_row_names { |
147
|
|
|
|
|
|
|
my ($self) = @_; |
148
|
|
|
|
|
|
|
if( not $self->_has_row_names ) { |
149
|
|
|
|
|
|
|
$self->_row_names( $self->row_names ); |
150
|
|
|
|
|
|
|
} |
151
|
|
|
|
|
|
|
} |
152
|
|
|
|
|
|
|
|
153
|
|
|
|
|
|
|
sub column { |
154
|
|
|
|
|
|
|
my ($self, $colname) = @_; |
155
|
|
|
|
|
|
|
confess "column $colname does not exist" unless $self->_columns->EXISTS( $colname ); |
156
|
|
|
|
|
|
|
$self->_columns->FETCH( $colname ); |
157
|
|
|
|
|
|
|
} |
158
|
|
|
|
|
|
|
|
159
|
|
|
|
|
|
|
sub _column_validate { |
160
|
|
|
|
|
|
|
my ($self, $name, $data) = @_; |
161
|
|
|
|
|
|
|
if( $name =~ /^\d+$/ ) { |
162
|
|
|
|
|
|
|
confess "invalid column name: $name can not be an integer"; |
163
|
|
|
|
|
|
|
} |
164
|
|
|
|
|
|
|
if( $self->number_of_columns ) { |
165
|
|
|
|
|
|
|
if( $data->number_of_rows != $self->number_of_rows ) { |
166
|
|
|
|
|
|
|
confess "number of rows in column is @{[ $data->number_of_rows ]}; expected @{[ $self->number_of_rows ]}"; |
167
|
|
|
|
|
|
|
} |
168
|
|
|
|
|
|
|
} |
169
|
|
|
|
|
|
|
1; |
170
|
|
|
|
|
|
|
} |
171
|
|
|
|
|
|
|
|
172
|
|
|
|
|
|
|
sub add_columns { |
173
|
|
|
|
|
|
|
my ($self, @columns) = @_; |
174
|
|
|
|
|
|
|
confess "uneven number of elements for column specification" unless @columns % 2 == 0; |
175
|
|
|
|
|
|
|
for ( List::AllUtils::pairs(@columns) ) { |
176
|
|
|
|
|
|
|
my ( $name, $data ) = @$_; |
177
|
|
|
|
|
|
|
$self->add_column( $name => $data ); |
178
|
|
|
|
|
|
|
} |
179
|
|
|
|
|
|
|
} |
180
|
|
|
|
|
|
|
|
181
|
|
|
|
|
|
|
sub add_column { |
182
|
|
|
|
|
|
|
my ($self, $name, $data) = @_; |
183
|
|
|
|
|
|
|
confess "column $name already exists" |
184
|
|
|
|
|
|
|
if $self->_columns->EXISTS( $name ); |
185
|
|
|
|
|
|
|
|
186
|
|
|
|
|
|
|
# TODO apply column role to data |
187
|
|
|
|
|
|
|
$data = PDL::SV->new( $data ) if ref $data eq 'ARRAY'; |
188
|
|
|
|
|
|
|
|
189
|
|
|
|
|
|
|
$self->_column_validate( $name => $data); |
190
|
|
|
|
|
|
|
|
191
|
|
|
|
|
|
|
|
192
|
|
|
|
|
|
|
$self->_columns->Push( $name => $data ); |
193
|
|
|
|
|
|
|
} |
194
|
|
|
|
|
|
|
|
195
|
|
|
|
|
|
|
# R |
196
|
|
|
|
|
|
|
# > iris[c(1,2,3,3,3,3),] |
197
|
|
|
|
|
|
|
# PDL |
198
|
|
|
|
|
|
|
# $ sequence(10,4)->dice(X,[0,1,1,0]) |
199
|
|
|
|
|
|
|
sub select_rows { |
200
|
|
|
|
|
|
|
my ($self, @which_rest) = @_; |
201
|
|
|
|
|
|
|
|
202
|
|
|
|
|
|
|
my $which = []; |
203
|
|
|
|
|
|
|
if( @which_rest > 1 ) { |
204
|
|
|
|
|
|
|
$which = \@which_rest; # array to arrayref |
205
|
|
|
|
|
|
|
} elsif( @which_rest == 1 ) { |
206
|
|
|
|
|
|
|
$which = $which_rest[0]; # get the first value off |
207
|
|
|
|
|
|
|
} else { # @which_rest == 0 |
208
|
|
|
|
|
|
|
$which = pdl []; # Empty PDL |
209
|
|
|
|
|
|
|
} |
210
|
|
|
|
|
|
|
|
211
|
|
|
|
|
|
|
$which = PDL::Core::topdl($which); # ensure it is a PDL |
212
|
|
|
|
|
|
|
|
213
|
|
|
|
|
|
|
my $colnames = $self->column_names; |
214
|
|
|
|
|
|
|
my $colspec = [ map { |
215
|
|
|
|
|
|
|
( $colnames->[$_] => $self->nth_column($_)->dice($which) ) |
216
|
|
|
|
|
|
|
} 0..$self->number_of_columns-1 ]; |
217
|
|
|
|
|
|
|
|
218
|
|
|
|
|
|
|
$self->_make_actual_row_names; |
219
|
|
|
|
|
|
|
my $select_df = $self->new( |
220
|
|
|
|
|
|
|
columns => $colspec, |
221
|
|
|
|
|
|
|
_row_names => $self->row_names->dice( $which ) ); |
222
|
|
|
|
|
|
|
$select_df; |
223
|
|
|
|
|
|
|
} |
224
|
|
|
|
|
|
|
|
225
|
|
|
|
|
|
|
sub _column_helper { |
226
|
|
|
|
|
|
|
my ($self) = @_; |
227
|
|
|
|
|
|
|
Data::Frame::Column::Helper->new( dataframe => $self ); |
228
|
|
|
|
|
|
|
} |
229
|
|
|
|
|
|
|
|
230
|
|
|
|
|
|
|
sub equal { |
231
|
|
|
|
|
|
|
my ($self, $other, $d) = @_; |
232
|
|
|
|
|
|
|
if( blessed($self) && $self->isa('Data::Frame') && blessed($other) && $other->isa('Data::Frame') ) { |
233
|
|
|
|
|
|
|
if( $self->number_of_columns == $other->number_of_columns ) { |
234
|
|
|
|
|
|
|
my @eq_cols = map { $self->nth_column($_) == $other->nth_column($_) } |
235
|
|
|
|
|
|
|
0..$self->number_of_columns-1; |
236
|
|
|
|
|
|
|
my @colnames = @{ $self->columns }; |
237
|
|
|
|
|
|
|
my @colspec = List::AllUtils::mesh( @colnames, @eq_cols ); |
238
|
|
|
|
|
|
|
return $self->new( columns => \@colspec ); |
239
|
|
|
|
|
|
|
} else { |
240
|
|
|
|
|
|
|
die "number of columns is not equal: @{[$self->number_of_columns]} != @{[$other->number_of_columns]}"; |
241
|
|
|
|
|
|
|
} |
242
|
|
|
|
|
|
|
} |
243
|
|
|
|
|
|
|
} |
244
|
|
|
|
|
|
|
|
245
|
|
|
|
|
|
|
1; |
246
|
|
|
|
|
|
|
|
247
|
|
|
|
|
|
|
__END__ |
248
|
|
|
|
|
|
|
|
249
|
|
|
|
|
|
|
=pod |
250
|
|
|
|
|
|
|
|
251
|
|
|
|
|
|
|
=encoding UTF-8 |
252
|
|
|
|
|
|
|
|
253
|
|
|
|
|
|
|
=head1 NAME |
254
|
|
|
|
|
|
|
|
255
|
|
|
|
|
|
|
Data::Frame - data frame implementation |
256
|
|
|
|
|
|
|
|
257
|
|
|
|
|
|
|
=head1 VERSION |
258
|
|
|
|
|
|
|
|
259
|
|
|
|
|
|
|
version 0.003 |
260
|
|
|
|
|
|
|
|
261
|
|
|
|
|
|
|
=head1 SYNOPSIS |
262
|
|
|
|
|
|
|
|
263
|
|
|
|
|
|
|
use Data::Frame; |
264
|
|
|
|
|
|
|
use PDL; |
265
|
|
|
|
|
|
|
|
266
|
|
|
|
|
|
|
my $df = Data::Frame->new( columns => [ |
267
|
|
|
|
|
|
|
z => pdl(1, 2, 3, 4), |
268
|
|
|
|
|
|
|
y => ( sequence(4) >= 2 ) , |
269
|
|
|
|
|
|
|
x => [ qw/foo bar baz quux/ ], |
270
|
|
|
|
|
|
|
] ); |
271
|
|
|
|
|
|
|
|
272
|
|
|
|
|
|
|
say $df; |
273
|
|
|
|
|
|
|
# --------------- |
274
|
|
|
|
|
|
|
# z y x |
275
|
|
|
|
|
|
|
# --------------- |
276
|
|
|
|
|
|
|
# 0 1 0 foo |
277
|
|
|
|
|
|
|
# 1 2 0 bar |
278
|
|
|
|
|
|
|
# 2 3 1 baz |
279
|
|
|
|
|
|
|
# 3 4 1 quux |
280
|
|
|
|
|
|
|
# --------------- |
281
|
|
|
|
|
|
|
|
282
|
|
|
|
|
|
|
say $df->nth_column(0); |
283
|
|
|
|
|
|
|
# [1 2 3 4] |
284
|
|
|
|
|
|
|
|
285
|
|
|
|
|
|
|
say $df->select_rows( 3,1 ) |
286
|
|
|
|
|
|
|
# --------------- |
287
|
|
|
|
|
|
|
# z y x |
288
|
|
|
|
|
|
|
# --------------- |
289
|
|
|
|
|
|
|
# 3 4 1 quux |
290
|
|
|
|
|
|
|
# 1 2 0 bar |
291
|
|
|
|
|
|
|
# --------------- |
292
|
|
|
|
|
|
|
|
293
|
|
|
|
|
|
|
=head1 DESCRIPTION |
294
|
|
|
|
|
|
|
|
295
|
|
|
|
|
|
|
This implements a data frame container that uses L<PDL> for individual columns. |
296
|
|
|
|
|
|
|
As such, it supports marking missing values (C<BAD> values). |
297
|
|
|
|
|
|
|
|
298
|
|
|
|
|
|
|
The API is currently experimental and is made to work with |
299
|
|
|
|
|
|
|
L<Statistics::NiceR>, so be aware that it could change. |
300
|
|
|
|
|
|
|
|
301
|
|
|
|
|
|
|
=head1 METHODS |
302
|
|
|
|
|
|
|
|
303
|
|
|
|
|
|
|
=head2 new |
304
|
|
|
|
|
|
|
|
305
|
|
|
|
|
|
|
new( Hash %options ) # returns Data::Frame |
306
|
|
|
|
|
|
|
|
307
|
|
|
|
|
|
|
Creates a new C<Data::Frame> when passed the following options as a |
308
|
|
|
|
|
|
|
specification of the columns to add: |
309
|
|
|
|
|
|
|
|
310
|
|
|
|
|
|
|
=over 4 |
311
|
|
|
|
|
|
|
|
312
|
|
|
|
|
|
|
=item * columns => ArrayRef $columns_array |
313
|
|
|
|
|
|
|
|
314
|
|
|
|
|
|
|
When C<columns> is passed an C<ArrayRef> of pairs of the form |
315
|
|
|
|
|
|
|
|
316
|
|
|
|
|
|
|
$columns_array = [ |
317
|
|
|
|
|
|
|
column_name_z => $column_01_data, # first column data |
318
|
|
|
|
|
|
|
column_name_y => $column_02_data, # second column data |
319
|
|
|
|
|
|
|
column_name_x => $column_03_data, # third column data |
320
|
|
|
|
|
|
|
] |
321
|
|
|
|
|
|
|
|
322
|
|
|
|
|
|
|
then the column data is added to the data frame in the order that the pairs |
323
|
|
|
|
|
|
|
appear in the C<ArrayRef>. |
324
|
|
|
|
|
|
|
|
325
|
|
|
|
|
|
|
=item * columns => HashRef $columns_hash |
326
|
|
|
|
|
|
|
|
327
|
|
|
|
|
|
|
$columns_hash = { |
328
|
|
|
|
|
|
|
column_name_z => $column_03_data, # third column data |
329
|
|
|
|
|
|
|
column_name_y => $column_02_data, # second column data |
330
|
|
|
|
|
|
|
column_name_x => $column_01_data, # first column data |
331
|
|
|
|
|
|
|
} |
332
|
|
|
|
|
|
|
|
333
|
|
|
|
|
|
|
then the column data is added to the data frame by the order of the keys in the |
334
|
|
|
|
|
|
|
C<HashRef> (sorted with a stringwise C<cmp>). |
335
|
|
|
|
|
|
|
|
336
|
|
|
|
|
|
|
=back |
337
|
|
|
|
|
|
|
|
338
|
|
|
|
|
|
|
=head2 string |
339
|
|
|
|
|
|
|
|
340
|
|
|
|
|
|
|
string() # returns Str |
341
|
|
|
|
|
|
|
|
342
|
|
|
|
|
|
|
Returns a string representation of the C<Data::Frame>. |
343
|
|
|
|
|
|
|
|
344
|
|
|
|
|
|
|
=head2 number_of_columns |
345
|
|
|
|
|
|
|
|
346
|
|
|
|
|
|
|
number_of_columns() # returns Int |
347
|
|
|
|
|
|
|
|
348
|
|
|
|
|
|
|
Returns the count of the number of columns in the C<Data::Frame>. |
349
|
|
|
|
|
|
|
|
350
|
|
|
|
|
|
|
=head2 number_of_rows |
351
|
|
|
|
|
|
|
|
352
|
|
|
|
|
|
|
number_of_rows() # returns Int |
353
|
|
|
|
|
|
|
|
354
|
|
|
|
|
|
|
Returns the count of the number of rows in the C<Data::Frame>. |
355
|
|
|
|
|
|
|
|
356
|
|
|
|
|
|
|
=head2 nth_columm |
357
|
|
|
|
|
|
|
|
358
|
|
|
|
|
|
|
number_of_rows(Int $n) # returns a column |
359
|
|
|
|
|
|
|
|
360
|
|
|
|
|
|
|
Returns column number C<$n>. Supports negative indices (e.g., $n = -1 returns |
361
|
|
|
|
|
|
|
the last column). |
362
|
|
|
|
|
|
|
|
363
|
|
|
|
|
|
|
=head2 column_names |
364
|
|
|
|
|
|
|
|
365
|
|
|
|
|
|
|
column_names() # returns an ArrayRef |
366
|
|
|
|
|
|
|
|
367
|
|
|
|
|
|
|
column_names( @new_column_names ) # returns an ArrayRef |
368
|
|
|
|
|
|
|
|
369
|
|
|
|
|
|
|
Returns an C<ArrayRef> of the names of the columns. |
370
|
|
|
|
|
|
|
|
371
|
|
|
|
|
|
|
If passed a list of arguments C<@new_column_names>, then the columns will be |
372
|
|
|
|
|
|
|
renamed to the elements of C<@new_column_names>. The length of the argument |
373
|
|
|
|
|
|
|
must match the number of columns in the C<Data::Frame>. |
374
|
|
|
|
|
|
|
|
375
|
|
|
|
|
|
|
=head2 row_names |
376
|
|
|
|
|
|
|
|
377
|
|
|
|
|
|
|
row_names() # returns a PDL |
378
|
|
|
|
|
|
|
|
379
|
|
|
|
|
|
|
row_names( Array @new_row_names ) # returns a PDL |
380
|
|
|
|
|
|
|
|
381
|
|
|
|
|
|
|
row_names( ArrayRef $new_row_names ) # returns a PDL |
382
|
|
|
|
|
|
|
|
383
|
|
|
|
|
|
|
row_names( PDL $new_row_names ) # returns a PDL |
384
|
|
|
|
|
|
|
|
385
|
|
|
|
|
|
|
Returns an C<ArrayRef> of the names of the columns. |
386
|
|
|
|
|
|
|
|
387
|
|
|
|
|
|
|
If passed a argument, then the rows will be renamed. The length of the argument |
388
|
|
|
|
|
|
|
must match the number of rows in the C<Data::Frame>. |
389
|
|
|
|
|
|
|
|
390
|
|
|
|
|
|
|
=head2 column |
391
|
|
|
|
|
|
|
|
392
|
|
|
|
|
|
|
column( Str $column_name ) |
393
|
|
|
|
|
|
|
|
394
|
|
|
|
|
|
|
Returns the column with the name C<$column_name>. |
395
|
|
|
|
|
|
|
|
396
|
|
|
|
|
|
|
=head2 add_columns |
397
|
|
|
|
|
|
|
|
398
|
|
|
|
|
|
|
add_columns( Array @column_pairlist ) |
399
|
|
|
|
|
|
|
|
400
|
|
|
|
|
|
|
Adds all the columns in C<@column_pairlist> to the C<Data::Frame>. |
401
|
|
|
|
|
|
|
|
402
|
|
|
|
|
|
|
=head2 add_column |
403
|
|
|
|
|
|
|
|
404
|
|
|
|
|
|
|
add_column(Str $name, $data) |
405
|
|
|
|
|
|
|
|
406
|
|
|
|
|
|
|
Adds a single column to the C<Data::Frame> with the name C<$name> and data |
407
|
|
|
|
|
|
|
C<$data>. |
408
|
|
|
|
|
|
|
|
409
|
|
|
|
|
|
|
=head2 select_rows |
410
|
|
|
|
|
|
|
|
411
|
|
|
|
|
|
|
select_rows( Array @which ) |
412
|
|
|
|
|
|
|
|
413
|
|
|
|
|
|
|
select_rows( ArrayRef $which ) |
414
|
|
|
|
|
|
|
|
415
|
|
|
|
|
|
|
select_rows( PDL $which ) |
416
|
|
|
|
|
|
|
|
417
|
|
|
|
|
|
|
The argument C<$which> is a vector of indices. C<select_rows> returns a new |
418
|
|
|
|
|
|
|
C<Data::Frame> that contains rows that match the indices in the vector |
419
|
|
|
|
|
|
|
C<$which>. |
420
|
|
|
|
|
|
|
|
421
|
|
|
|
|
|
|
This C<Data::Frame> supports PDL's data flow, meaning that changes to the |
422
|
|
|
|
|
|
|
values in the child data frame columns will appear in the parent data frame. |
423
|
|
|
|
|
|
|
|
424
|
|
|
|
|
|
|
If no indices are given, a C<Data::Frame> with no rows is returned. |
425
|
|
|
|
|
|
|
|
426
|
|
|
|
|
|
|
=head1 SEE ALSO |
427
|
|
|
|
|
|
|
|
428
|
|
|
|
|
|
|
=over 4 |
429
|
|
|
|
|
|
|
|
430
|
|
|
|
|
|
|
=item * L<R manual: data.frame|https://stat.ethz.ch/R-manual/R-devel/library/base/html/data.frame.html>. |
431
|
|
|
|
|
|
|
|
432
|
|
|
|
|
|
|
=item * L<Statistics::NiceR> |
433
|
|
|
|
|
|
|
|
434
|
|
|
|
|
|
|
=item * L<PDL> |
435
|
|
|
|
|
|
|
|
436
|
|
|
|
|
|
|
=back |
437
|
|
|
|
|
|
|
|
438
|
|
|
|
|
|
|
=head1 AUTHOR |
439
|
|
|
|
|
|
|
|
440
|
|
|
|
|
|
|
Zakariyya Mughal <zmughal@cpan.org> |
441
|
|
|
|
|
|
|
|
442
|
|
|
|
|
|
|
=head1 COPYRIGHT AND LICENSE |
443
|
|
|
|
|
|
|
|
444
|
|
|
|
|
|
|
This software is copyright (c) 2014 by Zakariyya Mughal. |
445
|
|
|
|
|
|
|
|
446
|
|
|
|
|
|
|
This is free software; you can redistribute it and/or modify it under |
447
|
|
|
|
|
|
|
the same terms as the Perl 5 programming language system itself. |
448
|
|
|
|
|
|
|
|
449
|
|
|
|
|
|
|
=cut |