**Block Category:** Matrix Operation

**Inputs:**

•**X and Y**:** **Accept columns of X- and Y-coordinates.

•**Signal In**:** **Input signal.

**Description:** The splineFit block calculates a spline
fit to two vectors of X,Y data, and returns the resulting curves with the second
block input as the independent variable. Output is the modified input signal.

**Calculate coefficients once on startup:** Calculates
the polynomial fit once at start of the simulation, which is fine for static
data sets. The fit algorithm is numerically costly, so it should only be run if
needed.

**Cubic:** Calculates the
piece-wise polynomial of degree 3.

**Linear:** Calculates the
piece-wise polynomial of degree 1.

**Parabolic:** Calculates
the piece-wise polynomial of degree 2.