Campbell Scientific CR9000X Measurement and Control System - Manual (Page 309)

Section 8. Processing and Math Instructions
If bit in expression1 is And bit in expression2 is The result is
0 0 1
0 1 1
1 0 0
1 1 1
INT(Source), Fix(Source)
The INT function returns the integer portion of a number.
Syntax
Int(source)
Fix( source )
Remarks
The argument source can be any valid numeric expression. Both INT and FIX
remove the fractional part of source and return the resulting integer value.
If the numeric expression results in a Null, INT and FIX return a Null.
The difference between INT and FIX is that if number is negative, INT returns the
first negative integer less than or equal to number, whereas FIX returns the first
negative integer greater than or equal to number. For example, INT converts -8.4 to
-9, and FIX converts -8.4 to -8.
Int and Fix Function Example
Dim A, B, C, D 'Declare variables.
BeginProg
A
= INT (-99.8) 'Returns -100
B = FIX (-99.8) 'Returns -99
C = INT (99.8) 'Returns 99
D = FIX (99.8) 'Returns 99
EndProg
LOG(Source) or LN(Source)
Returns the natural logarithm of a number. LOG and LN perform the same function.
Syntax
LOG( number ) or LN(
number
)
Remarks
The argument number can be any valid numeric expression that results in a value
greater than 0. The natural logarithm is the logarithm to the base e. The constant e
is approximately 2.718282.
You can calculate base-n logarithms for any number x by dividing the natural
logarithm of x by the natural logarithm of n as follows:
Logn(x) = LOG(x) / LOG(n)
The following example illustrates a procedure that calculates base-4 logarithms:
Log4 = LOG(X) / LOG(4)
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