Call: DERIVATIVE
A 1-dimensional Matrix
of ordinates.
This array must be strictly in increasing order and must
have the same length as y.
A 1-dimensional Matrix
of function values.
This array must have the same length as x.
A Number, the value of
x at which y'(x) is to be computed.
On return, a Number
approximately equal to y'(x)
A character String that
can contain the following keywords:
| Keyword
| Meaning
| Notes
|
LINEAR
| Linear interpolation
| Rarely useful
|
PARABOLIC
| Quadratic interpolation
| Default
|
CUBIC
| Cubic interpolation
| Risk of oscilation
|
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Formatted on 15/01/01 at 23:07.
