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binpairs noao.nproto


NAME · USAGE_ · PARAMETERS · DESCRIPTION · EXAMPLES · SEE_ALSO

NAME

binpairs -- Bin pairs of (x,y) points in log separation

USAGE

binpairs file1 file2 rmin rmax nbins

PARAMETERS

file1
File containing (x,y) points to be paired.
file2
File containing (x,y) points to be paired. This file may be the same as file1.
rmin
The minimum separation to be binned.
rmax
The maximum separation to be binned.
nbins
The number of log separation bins to be computed.
verbose = no
Print progress information?

DESCRIPTION

The (x,y) points in the specified files are paired and the number of pairs in each bin of log separation is computed and output. The two files may be the same. There are nbins separation bins between the separations rmin and rmax . If the verbose parameter is yes then progress information is printed on the standard error output at intervals of 5% of the time. The output consists of the lower limit of the separation bin, the number of pairs in the bin, the number of pairs divided by the total number of pairs, and the annular area of the bin.

This task is useful for computing two point correlation functions.

EXAMPLES

    cl> binpairs data1 data2 .01 1 20 >> result

	    or

    cl> binpairs data data .01 1 20 >> result

SEE ALSO


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