Update docs by adding link to catalog format documentation

matlab/catalog/extractColumns.m

@@ -14,6 +14,9 @@ function [varargout] = extractColumns(catalog, varargin)
 %   each structure has fields 'field' and 'val'. The function returns the
 %   values of the requested columns.
 %
+%   For more details on the catalog format, see:
+%   https://docs.cyfronet.pl/display/ISDOC/Catalog+-+description
+%
 %   Example:
 %       catalog(1).field = 'ID'; catalog(1).val = [1, 2, 3];
 %       catalog(2).field = 'Time'; catalog(2).val = [100, 200, 300];
@@ -34,6 +37,9 @@ function column = findColumn(catalog, colName)
 %   column = FINDCOLUMN(catalog, colName) searches the catalog structure
 %   for the specified column name and returns its values. If the column
 %   does not exist, an error is thrown.
+%
+%   Refer to the catalog documentation for further information:
+%   https://docs.cyfronet.pl/display/ISDOC/Catalog+-+description
 
     for c = 1:length(catalog)
         if strcmp(catalog(c).field, colName)