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## Copyright (C) 2006 Hansgeorg Schwibbe
##
## This program 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 of the License, or (at your option) any later
## version.
##
## This program 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 program; if not, see <http://www.gnu.org/licenses/>.
## Creates a latex file from a csv file. The generated latex file contains a
## tabular with all values of the csv file. The tabular can be decorated with
## row and column titles. The generated latex file can be inserted in any latex
## document by using the '\input{latex file name without .tex}' statement.
##
## Usage:
## - csv2latex(csv_file, csv_sep, latex_file)
## - csv2latex(csv_file, csv_sep, latex_file, tabular_alignments)
## - csv2latex(csv_file, csv_sep, latex_file, tabular_alignments, has_hline)
## - csv2latex(csv_file, csv_sep, latex_file,
## tabular_alignments, has_hline, column_titles)
## - csv2latex(csv_file, csv_sep, latex_file, tabular_alignments,
## has_hline, column_titles, row_titles)
##
## Parameters:
## csv_file - the path to an existing csv file
## csv_sep - the seperator of the csv values
## latex_file - the path of the latex file to create
## tabular_alignments - the tabular alignment preamble (default = {'l','l',...})
## has_hline - indicates horizontal line seperator (default = false)
## column_titles - array with the column titles of the tabular (default = {})
## row_titles - array with the row titles of the tabular (default = {})
##
## Examples:
## # creates the latex file 'example.tex' from the csv file 'example.csv'
## csv2latex("example.csv", '\t', "example.tex");
##
## # creates the latex file with horizontal and vertical lines
## csv2latex('example.csv', '\t', 'example.tex', {'|l|', 'l|'}, true);
##
## # creates the latex file with row and column titles
## csv2latex('example.csv', '\t', 'example.tex', {'|l|', 'l|'}, true,
## {'Column 1', 'Column 2', 'Column 3'}, {'Row 1', 'Row 2'});
function csv2latex (csv_file, csv_sep, latex_file, tabular_alignments, has_hline, column_titles, row_titles)
## set up the default values
if nargin < 7
row_titles = {};
end
if nargin < 6
column_titles = {};
end
if nargin < 5
has_hline = false;
end
if nargin < 4
tabular_alignments = {};
end
## load the csv file and create the csv cell
[fid, msg] = fopen (csv_file, 'r'); # open the csv file to read
csv = cell();
if fid != -1
[val, count] = fread(fid); # read all data from the file
fclose(fid); # close the csv file after reading
csv_value = '';
line_index = 1;
value_index = 1;
for index = 1:count
if val(index) == csv_sep
csv(line_index, value_index) = csv_value;
value_index++;
csv_value = '';
elseif (val(index) == '\n' || (val(index) == '\r' && val(index+1) == '\r'))
csv(line_index, value_index) = csv_value;
value_index++;
csv_value = '';
value_index = 1;
line_index++;
else
csv_value = sprintf('%s%c', csv_value, val(index));
end
end
end
## get the size and length values
[row_size, col_size] = size(csv);
alignment_size = length(tabular_alignments);
column_title_size = length(column_titles);
row_title_size = length(row_titles);
## create the alignment preamble and the column titles
alignment_preamble = '';
tabular_headline = '';
if row_title_size != 0
current_size = col_size + 1;
else
current_size = col_size;
end
for col_index = 1:current_size
if col_index <= alignment_size
alignment_preamble = sprintf ('%s%s', alignment_preamble, tabular_alignments(col_index));
else
alignment_preamble = sprintf ('%sl', alignment_preamble);
end
if column_title_size != 0
if col_index <= column_title_size
if col_index == 1
tabular_headline = sprintf ('%s', column_titles(col_index));
else
tabular_headline = sprintf ('%s & %s', tabular_headline, column_titles(col_index));
end
else
tabular_headline = sprintf ('%s &', tabular_headline);
end
end
end
## print latex file
[fid, msg] = fopen (latex_file, 'w'); # open the latex file for writing
if fid != -1
fprintf (fid, '\\begin{tabular}{%s}\n', alignment_preamble); # print the begin of the tabular
if column_title_size != 0
if has_hline == true
fprintf (fid, ' \\hline\n');
end
fprintf (fid, ' %s \\\\\n', tabular_headline); # print the headline of the tabular
end
for row_index = 1:row_size
if has_hline == true
fprintf (fid, ' \\hline\n');
end
for col_index = 1:col_size
if col_index == 1
if row_title_size != 0
if row_index <= row_title_size
fprintf (fid, ' %s & ', row_titles(row_index)); # print the row title
else
fprintf (fid, ' & '); # print an empty row title
end
end
fprintf (fid, ' %s ', csv{row_index, col_index});
else
fprintf (fid, '& %s ', csv{row_index, col_index});
end
end
fprintf (fid, '\\\\\n');
end
if has_hline == true
fprintf (fid, ' \\hline\n');
end
fprintf (fid, '\\end{tabular}', alignment_preamble); # print the end of the tabular
fclose(fid); # close the latex file after writing
end
end

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