Convert Integer to Linear Differential Operator
This function turns an integer specifying an order of a derivative into the equivalent linear differential operator object. It is also useful for checking that an object is of the "Lfd" class.
int2Lfd(m=0)
m |
either a nonnegative integer or a linear differential operator object. |
Smoothing is achieved by penalizing the integral of the square of the
derivative of order m over rangeval:
m = 0 penalizes the squared difference from 0 of the function
1 = penalize the square of the slope or velocity
2 = penalize the squared acceleration
3 = penalize the squared rate of change of acceleration
4 = penalize the squared curvature of acceleration?
a linear differential operator object of the "Lfd" class that is equivalent to the integer argument.
# Lfd to penalize the squared acceleration # typical for smoothing a cubic spline (order 4) int2Lfd(2) # Lfd to penalize the curvature of acceleration # used with splines of order 6 # when it is desired to study velocity and acceleration int2Lfd(4)
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