Back to Code

teg_read

Simple reader for tab-delimited ASCII files of (mostly) numeric values that's a little more robust than dlmread.

Updated 31 - 07 - 2013. Very simple detection for whether there's a header-line with variable names.

Updated 19 - 10 - 2014. Rewritten to use regexp.

function [D, varnames, vn2c] = teg_read2(fn)

skiplines = 0;
varnames = {};

fid = fopen(fn, 'r');
l{1} = fgetl(fid);
l{2} = fgetl(fid);
words{1} = regexp(l{1}, '\t', 'split');
words{2} = regexp(l{2}, '\t', 'split');
fclose(fid);

N = [0 0];
nNum = [0 0];
for n = 1:2,
    for m = 1:length(words{n}),
        x = str2num(words{n}{m});
        if ~isempty(x),
            nNum(n) = nNum(n) + 1;
        end;
        N(n) = N(n) + 1;
    end;
end;
r = nNum ./ N;
if r(1) < 0.5 * r(2),
    varnames = words{1};
    for ivn = 1:length(varnames),
        f = strfind(varnames{ivn}, '"');
        varnames{ivn}(f) = [];
        f = strfind(varnames{ivn}, '$');
        varnames{ivn}(f) = [];
    end;
    skiplines = 1;
end;

fid = fopen(fn, 'r');
D = [];
for n = 1:skiplines,
    l0 = fgetl(fid);
end;
while ~feof(fid),
    l0 = fgetl(fid);
    words = regexp(l0, '\t', 'split');
    tmp = [];
    for iw = 1:length(words),
        val = str2num(words{iw});
        if isempty(val),
            val = NaN;
        end;
        tmp = [tmp val];
    end;
    D = [D; tmp];
end;
fclose(fid);

vn2c = struct;
for n = 1:length(varnames),
    vn2c = setfield(vn2c, varnames{n}, n);
end;