Overview
Giac provides comprehensive plotting capabilities for both 2D and 3D graphics, including parametric plots, implicit plots, polar plots, and field plots.
2D Plotting Functions
plotfunc
gen plotfunc(const gen & f, const gen & vars, const vecteur & attributs,
int densityplot, double function_xmin, double function_xmax,
double function_ymin, double function_ymax,
double function_zmin, double function_zmax,
int nstep, int jstep, bool showeq, GIAC_CONTEXT);
Plot attributes (color, style, etc.)
Whether to create a density plot
Number of steps for evaluation
plotparam
gen plotparam(const gen & f, const gen & vars, const vecteur & attributs,
int densityplot, double function_xmin, double function_xmax,
double function_ymin, double function_ymax,
double function_tmin, double function_tmax,
double function_tstep, const gen & equation,
const gen & parameq, const context * contextptr);
plotimplicit
gen plotimplicit(const gen& f_orig, const gen& x, const gen & y,
double xmin, double xmax, double ymin, double ymax,
int nxstep, int nystep, double eps,
const vecteur & attributs, bool unfactored,
bool cklinear, const context * contextptr, int ckgeo2d);
The implicit equation f(x,y)=0
plotfield
gen plotfield(const gen & xp, const gen & yp,
const gen & x, const gen & y,
double xmin, double xmax, double xstep,
double ymin, double ymax, double ystep,
double scaling, vecteur & attributs,
bool normalize, const context * contextptr);
Scaling factor for vectors
Whether to normalize vectors
plotcontour
gen plotcontour(const gen & f0, bool contour, GIAC_CONTEXT);
Whether to show contour lines
plotseq
gen plotseq(const gen& f, const gen& x, double x0,
double xmin, double xmax, int niter,
const vecteur & attributs,
const context * contextptr, bool print);
3D Plotting Functions
plotparam3d
gen plotparam3d(const gen & f, const vecteur & vars,
double function_xmin, double function_xmax,
double function_ymin, double function_ymax,
double function_zmin, double function_zmax,
double function_umin, double function_umax,
double function_vmin, double function_vmax,
bool clrplot, bool f_autoscale,
const vecteur & attributs,
double ustep, double vstep,
const gen & eq, const vecteur & eqvars,
GIAC_CONTEXT);
Parametric equation(s) [x(u,v), y(u,v), z(u,v)]
Parameter variables [u, v]
Minimum u parameter value
Maximum u parameter value
Minimum v parameter value
Maximum v parameter value
Step size for u parameter
Step size for v parameter
Whether to automatically scale the plot
plotimplicit (3D)
gen plotimplicit(const gen& f_orig,
const gen& x, const gen & y, const gen & z,
double xmin, double xmax,
double ymin, double ymax,
double zmin, double zmax,
int nxstep, int nystep, int nzstep,
double eps, const vecteur & attributs,
bool unfactored, bool cklinear,
const context * contextptr);
The implicit equation f(x,y,z)=0
Utility Functions
ticks
vecteur ticks(double xmin, double xmax, bool bounds);
Whether to include boundary values
Vector of tick positions with simple decimal representation
plot_array
gen plot_array(const std::vector<std::vector<double>> & fij,
int imax, int jmax,
double xmin, double xmax, double dx,
double ymin, double ymax, double dy,
const vecteur & lz, const vecteur & attributs,
bool contour, int pal, GIAC_CONTEXT);
fij
std::vector<std::vector<double>>
2D array of function values
Whether to create contour plot
colormap functions
bool is_colormap_index(int pal);
bool is_colormap_cyclic(int pal);
int colormap_color(int pal, double t, GIAC_CONTEXT);
bool colormap_color_rgb(int pal, double t, int &c, int &r, int &g, int &b,
GIAC_CONTEXT);
Value between 0 and 1 to map to color
Global Variables
extern double gnuplot_xmin, gnuplot_xmax;
extern double gnuplot_ymin, gnuplot_ymax;
extern double gnuplot_zmin, gnuplot_zmax;
extern double gnuplot_tmin, gnuplot_tmax, gnuplot_tstep;
extern double global_window_xmin, global_window_xmax;
extern double global_window_ymin, global_window_ymax;
extern double x_tick, y_tick;
extern bool autoscale;
extern int PARAM_STEP;
extern int gnuplot_pixels_per_eval;
See Also
