Models 707B and 708B Switching Matrix Reference Manual
Section 6: Instrument programming
707B-901-01 Rev. A / August 2010
6-33
Math library functions
This library is an interface to most of the functions of the ANSI C math library. All trigonometric
functions work in radians. The functions
math.deg()
and
math.rad()
convert between radians
and degrees.
Math library functions
Function Description
math.abs(x)
Returns the absolute value of
x
.
math.acos(x)
Returns the arc cosine of
x
.
math.asin(x)
Returns the arc sine of
x
.
math.atan(x)
Returns the arc tangent of
x
.
math.atan2(y, x)
Returns the arc tangent of
y/x
, but uses the signs of both parameters to find
the quadrant of the result. (It also handles correctly the case of
x
being zero.)
math.ceil(x)
Returns the smallest integer larger than or equal to
x
.
math.cos(x)
Returns the cosine of
x
.
math.deg(x)
Returns the angle
x
(given in radians) in degrees.
math.exp(x)
Returns the value
e
x
.
math.floor(x)
Returns the largest integer smaller than or equal to
x
.
math.frexp(x)
Returns
m
and
e
such that
x = m2
e
, where
e
is an integer and the absolute
value of
m
is in the range
[0.5, 1]
(or zero when
x
is zero).
math.ldexp(x, n)
Returns
m2
e
(
e
should be an integer).
math.log(x)
Returns the natural logarithm of
x
.
math.log10(x)
Returns the base-10 logarithm of
x
.
math.max(x, …)
Returns the maximum value among its arguments.
math.min(x, …)
Returns the minimum value among its arguments.
math.pi
The value of
π
(3.141592654).
math.pow(x, y)
Returns
x
y
. (You can also use the expression
x^y
to compute this value.)
math.rad(x)
Returns the angle
x
(given in degrees) in radians.
math.random()
math.random(m)
math.random(m, n)
This function is an interface to the simple pseudo-random generator function
rand
provided by ANSI C.
When called without arguments, returns a uniform pseudo-random real
number in the range
[0,1]
. When called with an integer number
m
,
math.random
returns a uniform pseudo-random integer in the range
[1, m]
.
When called with two integer numbers
m
and
n
,
math.random
returns a
uniform pseudo-random integer in the range
[m, n]
.
math.randomseed(x)
Sets
x
as the "seed" for the pseudo-random generator: equal seeds produce
equal sequences of numbers.
math.sin(x)
Returns the trigonometric sine function of
x
.
math.sqrt(x)
Returns the square root of
x
. (You can also use the expression
x^0.5
to
compute this value.)
math.tan(x)
Returns the tangent of
x
.
