3.13.1 Vect

Method on mglGraph: void Vect (const mglData &x, const mglData &y, const mglData &ax, const mglData &ay, const char *sch=NULL, float zVal=NAN)

The function draws plane vector field plot for the field {ax, ay} depending parametrically on coordinates x, y at level z=zVal. The length and color of arrows are proportional to \sqrt{ax^2+ay^2}. The number of arrows depend on MeshNum (see section Other settings). The color is specified by the string argument sch. Previous color scheme is used by default. The size of ax and ay must be equal. The minor dimensions of arrays x, y and ax must be equal too. Arrays x and y can be vectors (not matrices as ax). The vector field is plotted for each z slice of ax, ay. See also VectL, VectC, Flow, Dew. See section Vect sample, for sample code and picture.

Method on mglGraph: void Vect (const mglData &ax, const mglData &ay, const char *sch=NULL, float zVal=NAN)

The same as previous with x, y equidistantly distributed in interval [Min, Max].

Method on mglGraph: void Vect (const mglData &x, const mglData &y, const mglData &z, const mglData &ax, const mglData &ay, const mglData &az, const char *sch=NULL)

This is 3D version of the first functions. Here arrays ax, ay, az must be 3-ranged tensors with equal sizes and the length and color of arrows is proportional to \sqrt{ax^2+ay^2+az^2}. See section Vect 3D sample, for sample code and picture.

Method on mglGraph: void Vect (const mglData &ax, const mglData &ay, const mglData &az, const char *sch=NULL)

The same as previous with x, y equidistantly distributed in interval [Min, Max].