gnumdata : an example

At the beginning, gnumdata was intended to padd columns in text files that is to say, for example to go from a file like
XX X X 97 1 1 2 3 98 1 0 2 3 4 5
to a file where all column have non empty values, padding an empty one with the value from previous line, which would give in our case
XX X X 97 1 1 97 1 2 97 1 3 98 1 0 98 2 0 98 3 0 98 4 0 98 5 0
gnumdata has then evolved towards more general actions like setting empty values to zero, computing the number of days from january 1st usingcolun dates and toward statistical computations ( mean, variance, frequency of distinct values...), ands toward options actions (ouput in Dbase and SAS formats, output for gnuplot and gif files, filtering first or last lines...)

           
    how to use gnumdata ?    

            gilles.hunault@univ-angers.fr