smart_arrays_plot_polyline

Smart Arrays Plot Polyline #

This package was designed for Web applications which need to plot 1D arrays in form of polylines (curves in the x, y plane).
A plot may consist of one or several polylines (scaled relative to each other if desired), optionally with x and y axes, a coordinate grid, a text legend, selection icons, and marker text.
Many array viewing options are provided, such as colors, fonts, zooming, scaling, shifting, rotation, layout parameters.
Also, lists of points represented by circles or other shapes can be drawn, e.g.to draw a curve using individual points rather than connecting the points by polylines.
The arrays to be plotted may have small or big sizes (even e.g. 1 million points). To achieve fast plotting without loosing information given typical screen or window sizes, a suitable data compression is applied before plotting (using the compression package listed at the end of the document).
Plotting is performed using Scalable Vector Graphics SVG.

Class SimplePlot to create a plot from several arrays, with x and y axes, a text legend and a coordinate grid with just a few lines of code.
Class Polyline to construct a polyline plot of desired size from an array with optional layout and viewing parameters.
Class Axis to construct an x and/or y axis for a polyline plot.
Class XYGrid to construct a rectangular coordinate grid consisting of horizontal and/or vertical lines, to be used to overlay a polyline plot.
Class Legend to construct a legend consisting of a text line at the top ("top title") and optionally several more lines, each one preceded by a color rectangle (useful when displaying several polylines).
Class MarkerLines to draw vertical marker lines and text above a polyline..
Class PhysUnits to convert between "physical units" and array indices, useful for axis annotation.
Classes Utils and JsonUtils providing useful helper functions.
Basic usage of the package: see example directory.