•depend is a name specifying a label for the vertical axis. The default value is Y.

The frequency of the data is plotted as bars, where each bar represents a collection of data points. The base of each bar spans the values of the data points, and the height indicates the number of data points. The width of each bar is specified by res. The overall maximum and minimum values for the data can be specified by indep; otherwise, the values in (xmin, ymin) and (xmax, ymax) are used.

Access: …µHISTOGRAM

Input/Output: None

See also: BAR, CONIC, DIFFEQ, FUNCTION, GRIDMAP, PARAMETRIC, PARSURFACE, PCONTOUR, POLAR, SCATTER, SLOPEFIELD, TRUTH, WIREFRAME, YSLICE

HISTPLOT

Type: Command

Description: Draw Histogram Plot Command: Plots a frequency histogram of the specified column in the current statistics matrix (reserved variable ΣDAT).

The data column to be plotted is specified by XCOL and is stored as the first parameter in the reserved variable ΣPAR. If no data column is specified, column 1 is selected by default. The y-axis is autoscaled and the plot type is set to HISTOGRAM.

HISTPLOT plots relative frequencies, using 13 bins as the default number of partitions. The RES command lets you specify a different number of bins by specifying the bin width. To plot a frequency histogram with numerical frequencies, store the frequencies in ΣDAT and execute BINS and then BARPLOT.

When HISTPLOT is executed from a program, the graphics display, which shows the resultant plot, does not persist unless PICTURE, PVIEW (with an empty list argument), or FREEZE is subsequently executed.

Access: …µHISTPLOT

Input/Output: None

See also: BARPLOT, BINS, FREEZE, PICTURE, PVIEW, RES, SCATRPLOT, XCOL

HMS–

Type: Command

Description: Hours-Minutes-Seconds Minus Command: Returns the difference of two real numbers, where the arguments and the result are interpreted in hours-minutes-seconds format.

The format for HMS (a time or an angle) is H.MMSSs, where:

•H is zero or more digits representing the integer part of the number (hours or degrees).

•MM are two digits representing the number of minutes.

•SS are two digits representing the number of seconds.

•s is zero or more digits (as many as allowed by the current display mode) representing the decimal fractional part of seconds.

Access:

…ÓTools LHMS–

( Óis the right-shift of the 9 key).

 

…& 9LHMS–

 

 

 

Input/Output:

 

 

 

 

 

 

 

 

 

 

 

 

 

Level 2/Argument 1

Level 1/Argument 2

 

Level 1/Item 1

 

 

 

 

 

 

 

 

HMS1

HMS2

→

HMS1 – HMS2

 

 

 

 

 

 

See also:

HMS→, →HMS, HMS+

 

 

 

 

 

 

 

 

 

HMS+

Command

 

 

 

Type:

 

 

 

Description: Hours-Minutes-Seconds Plus Command: Returns the sum of two real numbers, where the arguments and the result are interpreted in hours-minutes-seconds format.

3-106 Full Command and Function Reference