Section: User Commands (1) Updated: October 2009 Local index
maphimbu - 1-d histogram builder for numerical and text data
maphimbu [OPTION]... [FILE]
This program produces 1-d histograms from numerical or text data input. It can be also used to estimate the probability distribution function of a numerical variable - see http://en.wikipedia.org/wiki/Probability_density_function.
- -x <int>
x-data column (default is 1)
treat hole line as one string (single data record)
- -y <int>
y-data column (default is 2);
It is considered only when combined with '-m' or '-S'
- -d <float|int>
delta size (dx-resolution) in case of numerical data;
Keep in mind that 2 is not the same as 2.0: in the
first case the numbers are treated as integers, in
the latter as floats.
normalize the result
A) non-numerical data: n(x) = counts(x)/sum_of_counts
B) numerical data: the normalized probability density func.
is P(-INF < x <INF) = Int_[-INF:INF] P(x)*dx = 1 ;
For the numerical integration an open x-data interval
normalize data against the total sum of counts
(same as option '-n' with case A forced)
normalize the result with x-range mapped to unit;
The x-values are mapped to the interval [0:1],
respectively Int_[0:1] P(x)*dx = 1; This option is
mutually exclusive with '-n'.
compute sums and normalized sums of y-values;
The total sum of all y-values is used for the
compute the arithmetic mean of y-values
in the respective x-bar
center histogram bars (shifts x-axis by 0.5*dx)
- -s <int>
sort output numerically using the specified column;
It is not working correctly if header output.
do reverse sorting (in combination with '-s')
print a data description header
print program version and exit
output version and copyright information
display short help (options summary)
Note: this program is not intended for use in high order numerical computations.
Report bugs to <firstname.lastname@example.org>
Copyright © 2003-2007, 2009 Dimitar Ivanov
License: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
- REPORTING BUGS
This document was created by
using the manual pages.
Time: 21:14:49 GMT, April 16, 2011