tabfunc(1) [xfree86 man page]

TABFUNC(1)						      General Commands Manual							TABFUNC(1)

NAME

       tabfunc - convert table to functions for rcalc, etc.

SYNOPSIS

       tabfunc [ -i ] func1 [func2 ..]

DESCRIPTION

       Tabfunc	reads  a  table  of  numbers  from  the  standard input and converts it to an expression suitable for icalc(1), rcalc(1) and their
       cousins.  The input must consist of a M x N matrix of real numbers, with exactly one row per line.  The number of columns  must	always	be
       the same in each line, separated by whitespace and/or commas, with no missing values.  The first column is always the independent variable,
       whose value indexes all of the other elements.  This value does not need to be evenly spaced, but it must be either monotonically  increas-
       ing  or	monotonically decreasing.  (I.e. it cannot go up and then down, or down and then up.)  Maximum input line width is 4096 characters
       and the maximum number of data rows is 1024.  Input lines not beginning with a numerical value will be silently ignored.

       The command-line arguments given to tabfunc are the names to be assigned to each column.  Tabfunc then produces a single function for  each
       column  given.	If  there are some columns which should be skipped, the dummy name "0" may be given instead of a valid identifier.  (It is
       not necessary to specify a dummy name for extra columns at the end of the matrix.)

       The -i option causes tabfunc to produce a description that will interpolate values in between those given for the independent  variable	on
       the input.

EXAMPLE

       To convert a small data table and feed it to rcalc for some calculation:

	 rcalc -e `tabfunc f1 f2 < table.dat` -f com.cal

AUTHOR

       Greg Ward

SEE ALSO

       cnt(1), icalc(1), neaten(1), rcalc(1), rlam(1), total(1)

RADIANCE
							      10/8/97								TABFUNC(1)

HISTO(1)						      General Commands Manual							  HISTO(1)

NAME

       histo - compute 1-dimensional histogram of N data columns

SYNOPSIS

       histo [-c][-p] xmin xmax nbins
       histo [-c][-p] imin imax

DESCRIPTION

       Histo  bins columnular data on the standard input between the given minimum and maximum values.	If three command line arguments are given,
       the third is taken as the number of data bins between the first two real numbers.  If only two arguments are given, they are  both  assumed
       to be integers, and the number of data bins will be equal to their difference plus one.	The bins are always of equal size.

       The  output is N+1 columns of data (for N columns input), where the first column is the centroid of each division, and each row corresponds
       to the frequencies for each column around that value.

       If the -c option is present, then histo computes the cumulative histogram for each column instead of the straight frequencies.	The  upper
       value  of  each	bin  is printed also instead of the centroid.  This may be useful in computing percentiles, for example.  Values below the
       minimum specified are still counted in the cumulative total.

       The -p option tells histo to report the percentage of the total number of input lines rather than the absolute counts.  In the  case  of  a
       cumulative total, this yields the percentile values directly.  Values above the maximum are counted as well as values below in this case.

       All  input data is interpreted as real values, and columns must be white-space separated.  If any value is less than the minimum or greater
       than the maximum, it will be ignored unless the -c option is specified.

EXAMPLE

       To count data values between -1 and 1 in 50 bins:

	 histo -1 1 50 < input.dat

       To count frequencies of integers between 0 and 255:

	 histo 0 255 < input.dat

AUTHOR

       Greg Ward

SEE ALSO

       cnt(1), neaten(1), rcalc(1), rlam(1), tabfunc(1), total(1)

RADIANCE
							      9/6/96								  HISTO(1)