ClassPlot

1. summary A Fig with a coordinate axis
2. labels Reference,Version1

_(This page applies only to the 1.x branch of SVGFig.)_

class Plot

Acts like [ClassFig Fig], but draws a coordinate axis. You also need to supply plot ranges.

Arguments

• Plot(xmin, xmax, ymin, ymax, obj, obj, obj..., keyword options...)*

	xmin, xmax		_*required*_		minimum and maximum x values (in the objs' coordinates)
	ymin, ymax		_*required*_		minimum and maximum y values (in the objs' coordinates)
	obj		_optional list_		drawing primitives
	keyword options		_keyword list_		options defined below

The drawing primitives must implement the *SVG* method, as described in the [ClassFig Fig] documentation.

Unlike [ClassFig Fig], Plot has an implicit coordinate transformation: from (xmin, xmax), (ymin, ymax) to its bounding box. This coordinate transformation (a [DefWindow window] transformation) flips the direction of the y axis (SVG coordinates have y increasing downward, local Plot coordinates have y increasing upward).

Any additional coordinate transformation, given through the "trans" keyword option (or given as an argument to the *SVG* method) is composed with Plot's implicit window transformation.

The following are keyword options, with their default values:

	trans		None		transformation function
	x, y		5, 5		upper-left corner of the Plot in SVG coordinates
	width, height		90, 90		width and height of the Plot in SVG coordinates
	flipx, flipy		False, True		flip the sign of the coordinate axis
	minusInfinity		-1000		if an axis is logarithmic and an object is plotted at 0 or a negative value, -1000 will be used as a stand-in for NaN
	atx, aty		0, 0		the place where the coordinate axes cross
	xticks		-10		request ticks according to the [TickSpecification standard tick specification]
	xminiticks		True		request miniticks according to the [TickSpecification standard minitick specification]
	xlabels		True		request tick labels according to the [TickSpecification standard tick label specification]
	xlogbase		None		if a number, the axis and transformation are logarithmic with ticks at the given base (10 being the most common)
	same for y
	arrows		None		if a new identifier, create arrow markers and draw them at the ends of the coordinate axes
	text_attr		{}		a dictionary of attributes for label text
	axis_attr		{}		a dictionary of attributes for the axis lines

Member data

These data may be changed at any time. You do not need to make a list of all graphics before creating a Plot; you can create an empty Plot and append items to its `d` member.

	d		list of plottable objects
	all keyword options		same meaning as above

SVG method

Just like [ClassFig Fig], Plot has an *SVG* method to convert its objects into [ClassSVG SVG].

All graphics primitives must supply a *SVG* method with the same arguments.