xmisdat.m

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%                                 xmisdat.m 
%  Scope:   Determine the missing data into a specified column of an input table,
%           when the expected increment between two consecutive data is given.
%  Usage:   xmisdat
%  Inputs:  - selection of the input data file (with extension), e.g. xmisdat1.dat
%           - selection of the column number to be analyzed, e.g. 1
%           - selection the increment value between two consecutive data, e.g. 0.1
%  Outputs: - the following output data are listed for the selected column of the 
%             specified data table: first record value, last record value, maximum 
%             number of records, number of missing records, and specific missing 
%             values.
%  Last update: 06/06/00
%  Copyright (C) 1999-00 by LL Consulting. All Rights Reserved.

clear all

disp('  ');
inpfile = input('Enter the name of the input file (with extension) --> ','s');
disp('  ');
column = input('Select the column number to be analyzed, e.g. 3 --> ');
disp('  ');
incval = input('Select the increment value between consecutive data, e.g. 0.1 --> ');
disp('  ');

inptable = load(inpfile);

[nrow,ncol] = size(inptable);

fprintf('*********************************************************************\n\n');
fprintf('For column = %d  of the table %s \n\n',column, inpfile);
fprintf('First record value = %f \n', inptable(1,column));
fprintf('Last record value  = %f \n', inptable(nrow,column));
max_rec = 1 + round((inptable(nrow,column) - inptable(1,column))/incval);
fprintf('Maximum number of records = %d \n', max_rec );
fprintf('Number of missing records = %d \n', (max_rec - nrow) );
disp('  ');

km = 1;
value = inptable(1,column);
for k = 1:max_rec
    if (  abs(value - inptable(km,column)) > 1.e-5 ) % tolerance can be changed
      fprintf('Missing record at value = %f \n',value);
   else
      km =  km + 1;
   end
   value = value + incval;
end
fprintf('\n*********************************************************************\n');

disp('  ');
disp('End of the program  XMISDAT.m ');
disp('  ');