Method vect
| Improve this Doc View Sourcevect(Double[,], Double[,], Double, TransformFunc)
plvect: Vector plot
Declaration
public static void vect(Double[, ] u, Double[, ] v, Double scale, TransformFunc pltr)Parameters
| Type | Name | Description |
|---|---|---|
| Double[,] | u | |
| Double[,] | v | |
| Double | scale | Parameter to control the scaling factor of the vectors for plotting. If scale = 0 then the scaling factor is automatically calculated for the data. If scale lt 0 then the scaling factor is automatically calculated for the data and then multiplied by -scale. If scale gt 0 then the scaling factor is set to scale. |
| TransformFunc | pltr | A callback function that defines the transformation between the zero-based indices of the matrices u and v and world coordinates.For the C case, transformation functions are provided in the PLplot library: pltr0 for the identity mapping, and pltr1 and pltr2 for arbitrary mappings respectively defined by vectors and matrices. In addition, C callback routines for the transformation can be supplied by the user such as the mypltr function in examples/c/x09c.c which provides a general linear transformation between index coordinates and world coordinates.For languages other than C you should consult for the details concerning how PLTRANSFORM_callback arguments are interfaced. However, in general, a particular pattern of callback-associated arguments such as a tr vector with 6 elements; xg and yg vectors; or xg and yg matrices are respectively interfaced to a linear-transformation routine similar to the above mypltr function; pltr1; and pltr2. Furthermore, some of our more sophisticated bindings (see, e.g., ) support native language callbacks for handling index to world-coordinate transformations. Examples of these various approaches are given in examples/ltlanguagegtx09*, examples/ltlanguagegtx16*, examples/ltlanguagegtx20*, examples/ltlanguagegtx21*, and examples/ltlanguagegtx22*, for all our supported languages. |
Remarks
Draws a plot of vector data contained in the matrices (u[nx][ny],v[nx][ny]) . The scaling factor for the vectors is given by scale. A transformation routine pointed to by pltr with a pointer pltr_data for additional data required by the transformation routine to map indices within the matrices to the world coordinates. The style of the vector arrow may be set using plsvect.