How to read from a *.txt file to assign variables and paths

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Samuel
Samuel on 24 Jul 2013
I would like to read from a text file that has the format of the following:
BASEPATH="'/Users/asdf/xyz'"
FILENAME1="'HELLO.txt'"
FILENAME2="'GOODBYE.txt'"
XVALUE="1"
YVALUE="2"
The purpose is to use this as an input file to import other files, HELLO.txt and GOODBYE.txt (in the same directory - /Users/asdf/xyz), and assign values for a few variables (XVALUE = 1 and YVALUE = 2).
Any help will be appreciated. Thanks!

Accepted Answer

Matt Kindig
Matt Kindig on 24 Jul 2013
Edited: Matt Kindig on 24 Jul 2013
Easiest way is to parse with regular expressions and read into an output structure with named fields.
%read in file
str = fileread('/path/to/your/file.txt');
%extract fields and values
pieces = regexp(str, '(?<field>\w+)=(?<value>[^\n]+)', 'names');
out = struct(); %your variables
for k=1:length(pieces),
field = pieces(k).field;
val = pieces(k).value;
tf= ismember(val, char([34 39])); %remove " and ' from string
val = strtrim(val(~tf)); %also remove spaces
%try to convert to double. If successful, use converted value,
%otherwise use original (string) value
valn = str2double(val);
if ~isnan(valn), %conversion successful, use as numeric
val = valn;
end
%add to output structure
out.(field) = val;
end
  4 Comments
Matt Kindig
Matt Kindig on 27 Jul 2013
In particular, there are several Linux tools that would probably be faster and better for this task. Also, this can probably be done quite efficiently in Perl.

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