Kfppwr - Keithley 4200A-SCS Reference Manual

Section 13: LPT library function reference

kfppwr

This command raises a real number to a specified power and assigns the result to a specified variable.
Usage
int kfppwr(double *x, double *y, double *z);
x
y
z
Details
The value referenced by x is raised to the power of the value referenced by y, and the result is stored
in the location pointed to by z. If an overflow occurs, the result is ±Inf. If an underflow occurs, the
result is zero (0).
If x points to a negative number, a power of a negative number error is generated, and the result
returned is -Inf.
If x points to a value of zero (0) and y points to a negative number, a divide by zero (0) error is
generated, and the result returned is +Inf.
If x points to a value of 1.0, the result is 1.0, regardless of the exponent.
Example
double res2, pwres2, power=3.0;
.
.
measv(SMU1, &res2);/* Measure SMU1; store */
/* result in res2. */
kfppwr(&res2, &power,
&pwres2);/* res2 to the third power; */
/* return result to pwres2. */
.
Raises the variable res2 by the power of three. The result is stored in pwres2.
Also see
None
13-56
A variable that contains a floating point number
A variable that contains the exponent
A variable where the result of x
Model 4200A-SCS Parameter Analyzer Reference Manual
y
is stored
4200A-901-01 Rev. C / February 2017