Linear Interpolation (FPGA Module)

LabVIEW FPGA Module 8.2 Help
August 2006

NI Part Number:
371599B-01

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Performs linear interpolation to approximate a function evaluation at an arbitrary location in an interval between two known points. Details

	y0 is the value of the function at the interval endpoint corresponding to x (fractional) equals zero.
	y1 is the value of the function at the interval endpoint corresponding to x (fractional) equals one. y0 to y1 forms an interval over which to interpolate.
	x (fractional) specifies the evaluation point within the interval y0 <= y < y1). x (fractional) is an unsigned integer representing a fractional number in the range 0 <= x (fractional) < 1.
	y is the interpolated function evaluation. y = (y1 – y0)x + y0 where x is the fractional value resulting from scaling x (fractional) by 2^–16.

Linear Interpolation Details

The result of the multiplication by x (fractional) is a 32-bit number. The VI truncates the lower 16 bits to return y.