78 lines
2.4 KiB
Matlab
78 lines
2.4 KiB
Matlab
function [freq, init, data, varlist] = load_csv_file_data(file)
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% Loads data in a csv file.
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%
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% INPUTS
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% o file string, name of the csv file (with path).
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%
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% OUTPUTS
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% o freq integer scalar equal to 1, 4, 12 or 52 (for annual, quaterly, monthly or weekly frequencies).
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% o init dates object, initial date in the dataset.
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% o data matrix of doubles, the data.
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% o varlist cell of strings, names of the variables.
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%
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% REMARKS
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% The varlist output will be set only if the first line contains variable
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% names. Similarly, if the first column does not contain dates, then
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% freq will be 1 and init will be year 1.
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% Copyright (C) 2012-2013 Dynare Team
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%
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% This file is part of Dynare.
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%
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% Dynare is free software: you can redistribute it and/or modify
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% it under the terms of the GNU General Public License as published by
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% the Free Software Foundation, either version 3 of the License, or
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% (at your option) any later version.
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%
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% Dynare is distributed in the hope that it will be useful,
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% but WITHOUT ANY WARRANTY; without even the implied warranty of
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% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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% GNU General Public License for more details.
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%
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% You should have received a copy of the GNU General Public License
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% along with Dynare. If not, see <http://www.gnu.org/licenses/>.
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% Output initialization
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freq = 1; % Default frequency is annual.
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init = dates(1,1); % Default initial date is year one.
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varlist = [];
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assert(exist(file, 'file') == 2, ['load_csv_file_data: I can''t find file ' file '!']);
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if isoctave
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if ~user_has_octave_forge_package('io')
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error('The io package is required to read CSV files from Octave')
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end
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A = csv2cell(file);
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[data, T, L] = parsecell(A);
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withvars = L.numlimits(2,1) > L.txtlimits(2,1);
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withtime = L.numlimits(1,1) > L.txtlimits(1,1);
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else
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A = importdata(file);
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if ~isstruct(A)
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data = A;
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T = {};
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withvars = 0;
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withtime = 0;
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else
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data = A.data;
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T = A.textdata;
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% importdata() allows text only at the top and the left, so the following
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% tests are sufficient.
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withvars = size(T, 2) >= size(data, 2);
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withtime = size(T, 1) >= size(data, 1);
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end
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end
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if withvars
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varlist = T(1, 2:end);
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T = T(2:end, :);
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end
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if withtime
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init = dates(T{1, 1});
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freq = init.freq;
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end
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varlist = transpose(varlist);
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