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notcurses_plot(3)					     notcurses_plot(3)

NAME
       notcurses_plot -	high level widget for plotting

SYNOPSIS
       #include	<notcurses/notcurses.h>

	      #define NCPLOT_OPTION_LABELTICKSD	  0x0001u
	      #define NCPLOT_OPTION_EXPONENTIALD  0x0002u
	      #define NCPLOT_OPTION_VERTICALI	  0x0004u
	      #define NCPLOT_OPTION_NODEGRADE	  0x0008u
	      #define NCPLOT_OPTION_DETECTMAXONLY 0x0010u
	      #define NCPLOT_OPTION_PRINTSAMPLE	  0x0020u

	      typedef struct ncplot_options {
		// channels for	the maximum and	minimum	levels.
		// lerp	across the domain between these	two.
		uint64_t maxchannels;
		uint64_t minchannels;
		// styling used	for labels (NCPLOT_OPTION_LABELTICKSD)
		uint16_t legendstyle;
		// pass	NCBLIT_DEFAULT maps to NCBLIT_8x1 (assuming
		// UTF8) or NCBLIT_1x1 (in an ASCII environment)
		ncblitter_e gridtype;
		// independent variable	can either be a	contiguous range,
		// or a	finite set of keys. for	a time range, say the
		// previous hour sampled with second resolution, the
		// independent variable	would be the range [0..3600): 3600.
		// if rangex is	0, it is dynamically set to the	number
		// of columns.
		int rangex;
		const char* title;   //	optional title
		uint64_t flags;	     //	bitfield over NCPLOT_OPTION_*
	      }	ncplot_options;

       struct ncuplot* ncuplot_create(struct ncplane* n, const ncplot_options*
       opts, uint64_t miny, uint64_t maxy);

       struct ncdplot* ncdplot_create(struct ncplane* n, const ncplot_options*
       opts, double miny, double maxy);

       struct ncplane* ncuplot_plane(struct ncuplot* n);

       struct ncplane* ncdplot_plane(struct ncdplot* n);

       int ncuplot_add_sample(struct ncuplot* n, uint64_t x, uint64_t y);

       int ncdplot_add_sample(struct ncdplot* n, uint64_t x, double y);

       int ncuplot_set_sample(struct ncuplot* n, uint64_t x, uint64_t y);

       int ncdplot_set_sample(struct ncdplot* n, uint64_t x, double y);

       int ncuplot_sample(const	struct ncuplot*	n, uint64_t x, uint64_t* y);

       int ncdplot_sample(const	struct ncdplot*	n, uint64_t x, double* y);

       void ncuplot_destroy(struct ncuplot* n);

       void ncdplot_destroy(struct ncdplot* n);

DESCRIPTION
       These functions support histograms.  The	independent variable is	always
       an uint64_t.  The samples are either  uint64_ts	(ncuplot)  or  doubles
       (ncdplot).   Only  a  window  over the samples is retained at any given
       time, and this window can only move towards larger values of the	 inde-
       pendent	variable.   The	 window	 is moved forward whenever an x	larger
       than the	current	window's maximum is supplied to	add_sample or set_sam-
       ple.

       add_sample  increments  the current value corresponding to this x by y.
       set_sample replaces the current value corresponding to this x.

       If rangex is 0, or larger than the bound	 plane	will  support,	it  is
       capped  to  the available space.	 The domain can	either be specified as
       miny and	maxy, or domain	autodetection can be invoked via setting  both
       to  0.	If  the	domain is specified, samples outside the domain	are an
       error, and do not contribute to the plot.  Supplying  an	 x  below  the
       current window is an error, and has no effect.

       More  granular  block  glyphs  means more resolution in your plots, but
       they can	be difficult to	differentiate at small text  sizes.   Sextants
       and  Braille allow for more resolution on the independent variable.  It
       can be difficult	to predict how the Braille glyphs will look in a given
       font.

       The  same ncplot_options	struct can be used with	all ncplot types.  The
       flags field is a	bitmask	composed of:

       o NCPLOT_OPTION_LABELTICKSD: Label dependent axis ticks

       o NCPLOT_OPTION_EXPONENTIALD: Use an exponential	dependent axis

       o NCPLOT_OPTION_VERTICALI: Vertical independent axis

       o NCPLOT_OPTION_NODEGRADE: Fail rather than degrade blitter

       o NCPLOT_OPTION_DETECTMAXONLY: Detect only max domain, not min

       o NCPLOT_OPTION_PRINTSAMPLE: Print the most recent sample

       If NCPLOT_OPTION_LABELTICKSD or NCPLOT_OPTION_PRINTSAMPLE is  supplied,
       the  legendstyle	 field will be used to style the labels.  It is	other-
       wise ignored.

       The label is printed in the upper left, immediately to the right	of the
       topmost	axis  tick  (if	NCPLOT_OPTION_LABELTICKSD was used).  The most
       recent sample is	printed	opposite from the label	along the  independent
       axis (if	NCPLOT_OPTION_PRINTSAMPLE was used).

NOTES
       NCPLOT_OPTION_VERTICALI is not yet implemented.

RETURN VALUES
       create will return an error if miny equals maxy,	but they are non-zero.
       It will also return an error if maxy < miny.  An	invalid	gridtype  will
       result in an error.

       plane returns the ncplane on which the plot is drawn.  It cannot	fail.

SEE ALSO
       notcurses(3), notcurses_plane(3), notcurses_visual(3)

AUTHORS
       nick black <nickblack@linux.com>.

				    v2.4.3		     notcurses_plot(3)

NAME | SYNOPSIS | DESCRIPTION | NOTES | RETURN VALUES | SEE ALSO | AUTHORS

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