AF(1G)                  COMMAND REFERENCE                  AF(1G)



NAME
     af - arithmetic function

SYNOPSIS
     af [ -cn ] [ -t ] [ -v ] expression ...

DESCRIPTION
     Output is the result of executing the expression(s) once per
     complete set of input values.  Input comes from vectors
     specified in expression.

     Expression operands are:

     Vectors:
        filenames with the restriction that they must begin with
        a letter and be composed only from letters, digits, '',
        and '.'.  The first unknown filename (one not in the
        current directory) references the standard input.

     Functions:
        the name of a command followed by the command arguments
        in parentheses.  Arguments are written as on the command
        line, separated by spaces.

     Constants:
        floating point and integer (but not E notation).

     Expression operators are, in order of decreasing precedence:

     'v        next value from vector v.

     x^y, -x   x raised to the y power, negation of x; both
               associate right to left.

     x*y, x/y, x%y
               x multiplied by, divided by, modulo y,
               respectively; all associate left to right.

     x+y, x-y  x plus, minus y, respectively; both associate left
               to right.

     x,y       output the value of x followed by the value of y;
               associates from left to right

     Parentheses may be used to alter precedence.  Because many
     of the operator characters are special to the shell it is
     good practice to surround expressions in quotes.

OPTIONS
     -cn
        n elements per line in the output.




Printed 4/6/89                                                  1

AF(1G)                  COMMAND REFERENCE                  AF(1G)



     -t output is titled from the vector on the standard input.

     -v verbose mode, function expansions are echoed.

EXAMPLES
          af "3+4*5"

     yields 23.

          af "A,'A,A+'A,B"

     yields a four column matrix with columns of
     1) odd elements from A,
     2) even elements from A,
     3) sum of adjacent odd and even elements, and
     4) elements from B.

          af "sin(A)^2"

     yields the square of the sine of the elements of A.

SEE ALSO
     abs(1g), bar(1g), bel(1g), bucket(1g), ceil(1g), cor(1g),
     cusum(1g), cvrtopt(1g), dtoc(1g), erase(1g), exp(1g),
     floor(1g), gamma(1g), gas(1g), gd(1g), ged(1g),
     graphics(1g), gtop(1g), hardcopy(1g), hilo(1g), hist(1g),
     hpd(1g), intro(1g), label(1g), list(1g), log(1g), lreg(1g),
     mean(1g), mod(1g), pair(1g), pd(1g), pie(1g), plot(1g),
     point(1g), power(1g), prime(1g), prod(1g), ptog(1g),
     qsort(1g), quit(1g), rand(1g), rank(1g), remcom(1g),
     root(1g), round(1g), siline(1g), sin(1g), subset(1g),
     td(1g), tekset(1g), title(1g), total(1g), ttoc(1g), var(1g),
     vtoc(1g), whatis(1g), yoo(1g), and gps(5g).






















Printed 4/6/89                                                  2

%%index%%
na:216,76;
sy:292,237;
de:529,1781;
op:2310,155;2753,160;
ex:2913,424;
se:3337,1478;
%%index%%000000000118