Name
spline
- spline
type x y sx sy
Compute a spline fitted to a set of data points. The
Type
argument is eithernatural
orquadratic
.Parameters
x
andy
are vectors representing points of data to be fitted to the spline. Values ofx
must be monotonically increasing.Parameter
sx
is a vector containing the x-coordinates of the new points to be interpolated by the spline function. These must also be monotonically increasing and lie between the first and last values ofx
.The spline command creates a new vector
sy
, which contains the y-coordinates corresponding to the x-coordinate values stored insx
calculated using the spline function.
Example
vector x y sx sy xset {0.1 1.5 3.4 5.6} y set {0.2 4.5 1.3 9.8} xpopulate sx 10 spline natural x y sx sy graph .graph .graph element create original -x x -y y -color blue .graph element create spline -x sx -y sy -color red table . .graph
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