Reference Manual

PMAC 2 Software Reference
PMAC Mathematical Features 367
Example
P50=2.5 ;
P51=INT(P50) ; Take INT of positive value
P51 ; Query resulting value
2 ; Next lower integer value
P52=INT(-P50) ; Take INT of negative value
P52 ; Query resulting value
-3 ; Next lower integer value
LN
Function
Natural logarithm
Syntax
EXP({expression})
Domain
Positive real numbers
Domain units
User-determined
Range
All real numbers
Range units
User-determined
Remarks
LN implements the natural logarithm (logarithm base “e”) function of the mathematical
expression contained inside the following parentheses.
To implement the logarithm using another base, divide the natural logarithm of the
value by the natural logarithm of the base (log
y
x = ln x / ln y). The natural logarithm
of 10 is equal to 2.302585.
If the argument inside the parentheses is outside of the legal domain of positive
numbers, a 0 value will be returned. No error will be reported, and the program will
not stop. It is the programmer’s responsibility to check for possible domain errors.
Example
P19=LN(P20) ; Takes the natural log of P20
P6=LN(P5)/LN(10) ; Takes the log base 10 of P5
SIN
Function
Trigonometric sine
Syntax
SIN({expression})
Domain
All real numbers
Domain units
Radians/degrees
Range
-1.0 to +1.0
Range units
none
Remarks
SIN implements the trigonometric sine function of the mathematical expression
contained inside the following parentheses.
This function interprets its argument in degrees if I15 is set to the default value of 0; it
interprets its argument in radians if I15 is set to 1.
Example
P60=SIN(30) ; Computes cosine of 30
Y(Q80*SIN(Q81)) ; Move Y axis to calculated value