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function resu = display(df)
%# function resu = display(df)
%# Tries to produce a nicely formatted output of a dataframe.
%% Copyright (C) 2009-2017 Pascal Dupuis <cdemills@gmail.com>
%%
%% This file is part of the dataframe package for Octave.
%%
%% This package is free software; you can redistribute it and/or
%% modify it under the terms of the GNU General Public
%% License as published by the Free Software Foundation;
%% either version 3, or (at your option) any later version.
%%
%% This package is distributed in the hope that it will be useful,
%% but WITHOUT ANY WARRANTY; without even the implied
%% warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
%% PURPOSE. See the GNU General Public License for more
%% details.
%%
%% You should have received a copy of the GNU General Public
%% License along with this package; see the file COPYING. If not,
%% see <http://www.gnu.org/licenses/>.
if (exist ('OCTAVE_VERSION', 'builtin'))
mydisp = @(x) disp(x);
else
format short eng;
mydisp = @(x) evalc ('disp (x)');
isna = @(x) isnan (x);
end
%# generate header name
dummy = inputname (1);
if (isempty (dummy))
dummy = 'ans';
end
if (2 == length (df.x_cnt))
head = sprintf ('%s = dataframe with %d rows and %d columns', ...
dummy, df.x_cnt);
else
head = sprintf ('%s = dataframe with %d rows and %d columns on %d pages', ...
dummy, df.x_cnt);
end
if (~isempty (df.x_src))
for indi = (1:size (df.x_src, 1))
head = strvcat...
(head, [repmat('Src: ', size (df.x_src{indi, 1}, 1), 1)...
df.x_src{indi, 1}]);
end
end
if (~isempty (df.x_cmt))
for indi = (1:size(df.x_cmt, 1))
head = strvcat...
(head, [repmat('Comment: ', size (df.x_cmt{indi, 1}, 1), 1)...
df.x_cmt{indi, 1}]);
end
end
if (any (df.x_cnt > 0)) %# stop for empty df
dummy = []; vspace = repmat (' ', max (1, df.x_cnt(1)), 1);
indi = 1; %# the real, unfolded index
%# loop over columns where the corresponding _data really exists
for indc = (1:min (df.x_cnt(2), size (df.x_data, 2)))
%# emit column names and type
if (1 == length (df.x_rep{indc}))
dummy{1, 2+indi} = deblank (df.x_name{2}{indc});
dummy{2, 2+indi} = deblank (df.x_type{indc});
else
%# append a dot and the third-dimension index to column name
tmp_str = [deblank(mydisp (df.x_name{2}{indc})) '.'];
tmp_str = arrayfun (@(x) horzcat (tmp_str, num2str(x)), ...
(1:length (df.x_rep{indc})), 'UniformOutput', false);
dummy{1, 2+indi} = tmp_str{1};
dummy{2, 2+indi} = deblank (df.x_type{indc});
for indk = (2:length (tmp_str))
dummy{1, 1+indi+indk} = tmp_str{indk};
dummy{2, 1+indi+indk} = dummy{2, 2+indi};
end
end
%# 'print' each column
switch df.x_type{indc}
case {'char'}
indk = 1; while (indk <= size (df.x_data{indc}, 2))
tmp_str = df.x_data{indc}(:, indk); %#get the whole column
indj = cellfun ('isprint', tmp_str, 'UniformOutput', false);
indj = ~cellfun ('all', indj);
for indr = (1:length (indj))
if (indj(indr)),
if (isna (tmp_str{indr})),
tmp_str{indr} = 'NA';
else
if (~ischar (tmp_str{indr}))
tmp_str{indr} = char (tmp_str{indr});
end
tmp_str{indr} = undo_string_escapes (tmp_str{indr});
end
end
end
%# keep the whole thing, and add a vertical space
dummy{3, 2+indi} = mydisp (char (tmp_str));
dummy{3, 2+indi} = horzcat...
(vspace, char (regexp (dummy{3, 2+indi}, '.*', ...
'match', 'dotexceptnewline')));
indi = indi + 1; indk = indk + 1;
end
otherwise
%# keep only one horizontal space per line
unfolded = df.x_data{indc}(:, df.x_rep{indc});
indk = 1; while (indk <= size (unfolded, 2))
dummy{3, 2+indi} = mydisp (unfolded(:, indk));
tmp_str = char (regexp (dummy{3, 2+indi}, ...
'[-+]?[0-9]*\.?[0-9]+([eE][-+]?[0-9]+)?(\s??[-+]\s??[0-9]*\.?[0-9]+([eE][-+]?[0-9]+)?i)?', ...
'match', 'dotexceptnewline'));
tmp_str = horzcat...
(vspace, char (regexp (dummy{3, 2+indi}, '\S.*', ...
'match', 'dotexceptnewline')));
dummy{3, 2+indi} = tmp_str;
indi = indi + 1; indk = indk + 1;
end
end
end
%# put everything together
vspace = [' '; ' '; vspace];
%# second line content
resu = [];
for (ind1 = 1:size (df.x_ridx, 2))
%# simple case: no column-compressed data
if ((1 == size(df.x_ridx, 3)) && ...
(any (~isna (df.x_ridx(1:df.x_cnt(1), ind1)))) || ...
(any (isempty (df.x_ridx(1:df.x_cnt(1), ind1)))))
dummy{2, 1} = [sprintf('_%d', ind1) ; 'Nr'];
%# save the actual format; display in short form, and restore.
try
%# Octave 3.8 (CentOS 7). MatLab still uses this in R2017
myform = get(0, 'format');
myformfunc = @(x) format(x);
catch
%# Octave 4.0 and 4.2 specific
try
myform = __formatstring__(); myformfunc = @(x) __formatstring__(x);
catch
%# Octave 4.4 ?
try
myform = format(); myformfunc = @(x) format(x);
catch
myform = "short"; myformfunc = [];
end
end
end
format short;
dummy{3, 1} = mydisp (df.x_ridx(1:df.x_cnt(1), ind1));
if (~isempty (myformfunc))
myformfunc (myform);
end
%# re-format disp output over many lines, trimming extra spaces
indi = regexp (dummy{3, 1}, '\S.*', 'match', 'dotexceptnewline');
%# was
%# indi = regexp (dummy{3, 1}, '\b.*\b', 'match', 'dotexceptnewline');
if (isempty (resu))
resu = strjust (char (dummy{2, 1}, indi), 'right');
else
resu = horzcat(resu, vspace, strjust (char (dummy{2, 1}, indi), ...
'right'), vspace);
end
else
%# column-compressed data
for ind2 = (1:size (df.x_ridx, 3))
if ((any (~isna (df.x_ridx(1:df.x_cnt(1), ind1, ind2)))) || ...
(any (isempty (df.x_ridx(1:df.x_cnt(1), ind1, ind2)))))
dummy{2, 1} = [sprintf('_%d.%d', ind1, ind2) ; 'Nr'];
dummy{3, 1} = mydisp (df.x_ridx(1:df.x_cnt(1), ind1, ind2));
indi = regexp (dummy{3, 1}, '\S.*', 'match', ...
'dotexceptnewline');
if (isempty (resu))
resu = strjust (char (dummy{2, 1}, indi), 'right');
else
resu = horzcat (resu, vspace, strjust (char(dummy{2, 1}, indi), ...
'right'), vspace);
end
end
end
end
end
%# emit row names
if (isempty (df.x_name{1})),
dummy{2, 2} = []; dummy{3, 2} = [];
else
dummy{2, 2} = [' ';' '];
dummy{3, 2} = df.x_name{1};
end
%# insert a vertical space
if (~isempty (dummy{3, 2}))
indi = ~cellfun ('isempty', dummy{3, 2});
if (any (indi))
try
resu = horzcat (resu, vspace, strjust (char(dummy{2, 2}, dummy{3, 2}),...
'right'));
catch
disp ('line 172 '); keyboard
end
end
end
%# emit each colum
for indi = (1:size (dummy, 2) - 2)
%# was max(df.x_cnt(2:end)),
try
%# avoid this column touching the previous one
if (any (cellfun ('size', dummy(1:2, 2+indi), 2) >= ...
size (dummy{3, 2+indi}, 2)))
resu = horzcat (resu, vspace);
end
resu = horzcat (resu, strjust (char (dummy{:, 2+indi}), 'right'));
catch
tmp_str = sprintf ('Emitting %d lines, expecting %d', ...
size (dummy{3, 2+indi}, 1), df.x_cnt(1));
keyboard
error (tmp_str);
end
end
else
resu = '';
end
resu = char (head, resu); mydisp (resu)
end
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