# PLBIN

## NAME

**plbin** - Plot a histogram from binned data

## SYNOPSIS

**plbin**(*nbin*, *x*, *y*, *opt*)

## DESCRIPTION

Plots a histogram consisting of *nbin* bins. The value associated with the i’th bin is placed in *x*[i], and the number of points in the bin is placed in *y*[i]. For proper operation, the values in *x*[i] must form a strictly increasing sequence. By default, *x*[i] is the left-hand edge of the i’th bin. If *opt*=PL_BIN_CENTRED is used, the bin boundaries are placed midway between the values in the *x* array. Also see **plhist**(3plplot) for drawing histograms from unbinned data.

Redacted form: General: **plbin(x, y, opt)** Perl/PDL: **plbin(nbin, x, y, opt)** Python: **plbin(nbin, x, y, opt)**

This function is not used in any examples.

## ARGUMENTS

*nbin* (PLINT, input)

Number of bins (i.e., number of values in *x* and *y* arrays.)

*x* (PLFLT *, input)

Pointer to array containing values associated with bins. These must form a strictly increasing sequence.

*y* (PLFLT *, input)

Pointer to array containing number of points in bin. This is a PLFLT (instead of PLINT) array so as to allow histograms of probabilities, etc.

*opt* (PLINT, input)

Is a combination of several flags: *opt*=PL_BIN_DEFAULT: The *x* represent the lower bin boundaries, the outer bins are expanded to fill up the entire x-axis and bins of zero height are simply drawn. *opt*=PL_BIN_CENTRED|...: The bin boundaries are to be midway between the *x* values. If the values in *x* are equally spaced, the values are the center values of the bins. *opt*=PL_BIN_NOEXPAND|...: The outer bins are drawn with equal size as the ones inside. *opt*=PL_BIN_NOEMPTY|...: Bins with zero height are not drawn (there is a gap for such bins).

## AUTHORS

Geoffrey Furnish and Maurice LeBrun wrote and maintain PLplot. This man page was automatically generated from the DocBook source of the PLplot documentation, maintained by Alan W. Irwin and Rafael Laboissiere.

## SEE ALSO

PLplot documentation at http://plplot.sourceforge.net/resources.