panel set twindow_function b_spline
Format:
panel set twindow_function b_spline | |
|---|---|
curve_name = | an existing curve |
alpha = | function |
derivative_order = | integer |
component = | curve_component |
Example:
panel set twindow_function b_spline & | |
|---|---|
panel set twindow_function b_spline curve_name = | curve_1 & |
panel set twindow_function b_spline derivative_order = | 2 & |
panel set twindow_function b_spline component = | x |
Description:
Parameter | Value Type | Description |
|---|---|---|
curve_name | An Existing Acurve | A curve name is string of characters that identifies a curve |
alpha | Function | A real variable that identifies the value of the independent parameter,  , at which the CURVE function evaluates the curve. |
derivative_order | Integer | Order of the derivative that you want returned from the curve. |
component | Curve_component | An integer variable that specifies the component that the CURVE function returns |
Extended Definition:
1. Curve names are assigned by the user when curves are created. After a curve has been created, it may be referenced by its name until it is deleted. A curve may not have the same name as another curve on the same plot. A curve is associated to a plot and may be referenced at any time with respect to the plot. For example, a curve named "c1" on plot "p1" may be referenced by the full specification of ".p1.c1". This type of full name specification avoids the need to force a given plot to be the "current" or "default" to reference data (i.e. a curve) associated with it. This is very useful when copying a curve from one plot to another, etc.
A curve_name may be arbitrarily long and a combination of letters of the alphabet and numbers may be used. The leading character must be a letter.
2. If the curve is a B-spline computed by the CURVE statement, alpha must be in the domain -1 < < 1
< 1 3. The legal values are:
1 - returns the x coordinate or derivative
2 - returns the y coordinate or derivative
3 - returns the z coordinate or derivative
4. An integer variable that specifies the component that the CURVE function returns. The legal values are:
1 - returns the x coordinate or derivative
2 - returns the y coordinate or derivative
3 - returns the z coordinate or derivative
Parameters iord and icomp together allow you to request any one of the following nine return values:
1 - returns the x coordinate or derivative
2 - returns the y coordinate or derivative
3 - returns the z coordinate or derivative
Parameters iord and icomp together allow you to request any one of the following nine return values:
