Numeric

in_bicubic poly coefs

Duplicate of LabVIEW 8 vi.lib routine.

Increment if True

This VI adds one to a the given number if +1? is true and leaves it unchanged if false.

Integer divide+

Perform an integer divide operation, checking for a divide by zero error.

Loose Fit

Determin a step size and superset interval that involves only the powers of 10 multiplied by 1, 2, or 5. Number of divisions is either a maximum or an exact specification.

nth Root

Take the nth root of x. Handles x<0 when n is odd, returning the negative real root.

Round Down to Even Integer

Round down to the nearest even integer.

Round Mostly Down

Add 0.001 and then round down. This protects against floating point roundoff errors that would cause a large shift when an approximate integer is rounded.

Round up to multiple

Round input up to the nearest multiple of the base.

Round Up to Power of Two

Round up to a power of two.

simple PID2

NOTE: This VI was copied from a National Instruments PID VI. It is included here in the palettes for convenience. This is a simple PID which can be used to control a system. The idea of a PID is to control a system by comparing the set point (the system value you want) to the process variable (the current system value), and adjusting the output value (what you output to the system in an attempt to get the process variable to approach the set point. The set point is the value you desire the system to achieve. The process variable is the current value of your system, and is usually acquired by an analog input channel of your DAQ device. P is the Proportional component. This is the amount by which the error gets multiplied. The error is the set point minus the process variable. I is the Integral component. This is how much the PID output will depend on what has happened in the past. D is the derivative component. This is how much the PID output will depend on speculation of what will happen in the future. The output value is the PID output which is usually generated at an analog output channel of your DAQ device in an attempt to get the process variable equal to the set point. The upper limit is the maximum value the PID can output to the system. The lower limit is the minimum value the PID can output to the system.

Zero if NaN

Changes a double's value to '0' if it is 'NaN'.

Zero if True

This VI outputs 0 if 0? is true and leaves Number In unchanged if false.