2.8.3 bspline

1 Brief Information
2 Command Line Usage
3 X-Function Execution Options
4 Variables
5 Description
6 Examples
7 Algorithm
8 Related X-Functions

Brief Information

Perform cubic B-Spline interpolation and extrapolation

Command Line Usage

1. bspline ix:=Col(3) iy:=(Col(1),Col(2));

2. bspline ix:=Col(3) iy:=(Col(1),Col(2)) ox:=Col(4);

X-Function Execution Options

Please refer to the page for additional option switches when accessing the x-function from script

Variables

Display Name	Variable Name	I/O and Type	Default Value	Description
X Values to Interpolate	ix	Input vector	<unassigned>	Specifies the X values to be interpolated on the spline.
Input	iy	Input XYRange	<active>	The input XY range data to be interpolated.
Smoothing Factor	sf	Input double	<unassigned>	Smoothing Factor. The factor helps user to control the balance between the smoothing and closeness.
Output	ox	Output vector	<new>	Specifies the column to save output interpolated Y values on the spline.
Coefficients	coef	Output vector	<optional>	Whether or not to output spline coefficients.

Description

This function performs Cubic B-spline interpolation on XY range data. You should specify the X coordinates on the spline, and it will output a vector contains the interpolated Y values on these X values.