Random Number Generation

[HRANDOMN]

                            +----------------+
                            | R=  HRNDM1 (ID) |
                            +----------------+
                                  

Action: Returns a random number distributed according to the contents of 1-dimensional histogram.

Input parameter:

ID

Identifier of an existing 1-dimensional histogram according to whose distribution random numbers have to be generated.

Remark: 

1. The first time HRNDM1 is called on a given histogram with identifier ID, the channel contents of the original histogram are replaced by the integrated channel contents, normalized to 1.
2. The histogram ID must be booked with 1 bin/word (VMX=0)
3. If the histogram ID does not exist, zero is returned
4. If the histogram ID is empty, or if the sum of its channel contents is not positive, a message is printed and a flat distribution is assumed.

                          +--------------------------+
                          | CALL  HRNDM2 (ID,RX*,RY*) |
                          +--------------------------+
                                     

   Action: Returns a random point (RX, RY) distributed according to the contents of a 2-dimensional histogram.

   Input parameter:

   ID

   Identifier of a 2-dimensional histogram

   Output parameters

   RX,RY

   Random numbers.

   Remark:

   1. Same as HRNDM1
   2. These 2 entries can be used in conjunction with HBFUN1 and HBFUN2 respectively.