.BG
.VE $Header: /usr3/s/current/s/.help/RCS/logic,v 1.2 83/12/30 19:29:53 rab Exp $
.FN logic
.FN |
.FN !
.FN &
.TL
&   |   !  : Logical Operations; And, Or, Not
.CS
expr1 & expr2
expr1 | expr2
! expr1
.PP
.AG expri
logical structures.  Missing values (NAs) are allowed.
.RT
logical result of and-ing, or-ing or negation. In case of the
first two the result is as long as the longer of the operands.
When time-series operands are used, the time domain of the value
is the intersection of the time domains of the operands.
.SH SEE ALSO
`xor', exclusive or.
.EX
x[a>13 & b<2]     #elements of x corresp. to a>13 and b<2
.KW basic*
.KW logic
.KW boolean
.KW builtin
.WR
