One-dimensional case

CALL HBOOK1 (ID,CHTITL,NX,XMI,XMA,VMX)
         

Action: Books a one-dimensional histogram.

Input parameter description:

ID

histogram identifier, integer non zero

CHTITL

histogram title (character variable or constant up to 80 characters)

NX

number of channels

XMI

lower edge of first channel

XMA

upper edge of last channel

VMX

upper limit of single channel content (see below).
VMX=0. means 1 word per channel (no packing).

Special values:

• If XMA$\le$ XMI, origin and binwidth are calculated automatically, and one word is reserved per channel.
• Zero (0) is an illegal histogram identifier.
• If the histogram ID already exists it will be deleted and recreated with the new specifications. A warning message is printed.
• VMX is used to compute the number of bits to be allocated per histogram channel. If VMX<1. then one full word is reserved per channel. When filling a histogram with weights the latter are truncated to the nearest integer unless one full word is reserved per channel (i.e. VMX = 0.). Filling with negative weights will give meaningless results unless one word per channel has been allocated.
  Automatic calculation of limits (XMA$\le$ XMI) forces one word per channel.