I Instructions to programs

An I card starts with I followed by a series of CCSL-word/number pairs. The main program decides how this information is interpreted.

For programs like ARRNGE, ARRINC the vocabulary is:

DTYP

format for input data (mandatory)

PRIN

control of output format (default=1)

RNUM

control of record number output (default=0)

WGHT

weighting scheme required (default=0)

REJ

whether a list of rejections is to be supplied (default=0)

whose meanings are explained in the relevant program specifications. Routine IICD3 interprets the I card according to the meanings above.

For LSQ programs the vocabulary is:

NCYC

number of cycles (default 3)

CYC1

number to be assigned to first cycle (default 1)

PRIN

frequency at which output lists are printed (default 2)
PRIN=0 no printing
PRIN=1 first cycle
PRIN=2 last cycle
PRIN=3 first and last cycles
PRIN=4 every cycle

MCOR

controls the output of correlations at end of job (default +70)
MCOR=0 whole correlation matrix printed
MCOR $-$ve no printing
MCOR +ve correlations above MCOR printed

CONV

convergence criterion; LSQ cycling is terminated if the maximum

$$shift/\sigma < CONV \mbox{(default 0.01)}$$

Routine IICD1 interprets the I card according to the meanings above.

ROUTINES WHICH READ THE CARDS:

Routine INPUTI reads and stores all the information from I cards without interpreting it. LOGICAL FUNCTION ONCARD('I',WORD,X) will detect the particular WORD if it has been given on an I card, and set X to the value of the number following it.