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 pointplot
 create a 2-D point plot

 Calling Sequence pointplot(L, options) pointplot(A, options) pointplot(v1, v2, options)

Parameters

 L - set or list of two-dimensional points A - n by 2 Matrix, where n is any positive integer v1, v2 - Vectors of the same length options - (optional) equations of the form option=value, where option is any of the available plot options or one of connect, symbol, or color

Description

 • The pointplot function is used to create a two-dimensional plot of points. The points that are to be plotted come from the set or list L, the Matrix A, or the Vectors v1 and v2.
 • The list may be either a list of points p, where p is a list or Vector containing two numbers, or a flat list with an even number of values.
 • The Matrix must be n by 2, where n is any positive integer. Each row of the Matrix contains the x- and y-coordinates of a point. If a 2 by n Matrix is given, with n not equal to 2, then it will be automatically transposed. The Vectors, representing the x-coordinates and y-coordinates respectively, can have any length, but both must have the same length.
 • If you have a very large number of points, it is recommended that you provide the data as a Matrix with datatype set to float.
 • A common error is to provide a sequence of points without putting them in a list. Note that pointplot([1,2], [3,4]) is interpreted as the points (1,3) and (2,4), and not as the points (1,2) and (3,4).
 • The option connect=true specifies that the points are to be connected by line segments.  In this case, L should be a list to ensure a consistent ordering of the points. The value of this option is assumed to be true if the style=line or style=pointline option is provided.
 • The option symbol=s specifies the symbol used in the display.  See the symbol entry in the plot/option help page for a list of available symbols.
 • The option color=s specifies the color of the points. The allowable values for s are given in the plot/color help page. A list or Vector of n colors, where n is the number of points, may also be provided.
 • Remaining arguments are interpreted as options which are specified as equations of the form option = value. These options are the same as those available for the plot command, as described in plot/options.

Examples

 > $\mathrm{with}\left(\mathrm{plots}\right):$
 > $\mathrm{pointplot}\left(\mathrm{Matrix}\left(\left[\left[0,1\right],\left[1,-1\right],\left[3,0\right],\left[4,-3\right]\right],\mathrm{datatype}=\mathrm{float}\right),\mathrm{axes}=\mathrm{boxed}\right)$ > $\mathrm{pointplot}\left(\left[\left[0,1\right],\left[1,-1\right],\left[3,0\right],\left[4,-3\right]\right],\mathrm{color}=\left[\mathrm{red},\mathrm{green},\mathrm{black},\mathrm{blue}\right],\mathrm{axes}=\mathrm{boxed}\right)$ > $\mathrm{pointplot}\left(\left\{\mathrm{seq}\left(\left[n,\mathrm{sin}\left(\frac{n}{10}\right)\right],n=0..30\right)\right\}\right)$ > $\mathrm{points}≔\left\{\mathrm{seq}\left(\left[{T}^{2},T\right],T=0..40\right)\right\}:$
 > $\mathrm{pointplot}\left(\mathrm{points}\right)$ > $\mathrm{pointplot}\left(\mathrm{points},\mathrm{coords}=\mathrm{polar},\mathrm{color}=\mathrm{red}\right)$ The following constructions are equivalent.

 > $A≔⟨⟨1,2,3,4,5⟩|⟨1,3,5,7,9⟩⟩$
 ${A}{≔}\left[\begin{array}{cc}{1}& {1}\\ {2}& {3}\\ {3}& {5}\\ {4}& {7}\\ {5}& {9}\end{array}\right]$ (1)
 > $\mathrm{pointplot}\left(A,\mathrm{color}=\mathrm{blue},\mathrm{symbol}=\mathrm{diamond}\right)$ > $\mathrm{v1}≔⟨1,2,3,4,5⟩$
 ${\mathrm{v1}}{≔}\left[\begin{array}{c}{1}\\ {2}\\ {3}\\ {4}\\ {5}\end{array}\right]$ (2)
 > $\mathrm{v2}≔⟨1,3,5,7,9⟩$
 ${\mathrm{v2}}{≔}\left[\begin{array}{c}{1}\\ {3}\\ {5}\\ {7}\\ {9}\end{array}\right]$ (3)
 > $\mathrm{pointplot}\left(\mathrm{v1},\mathrm{v2},\mathrm{color}=\mathrm{blue},\mathrm{symbol}=\mathrm{diamond}\right)$ It is also possible to add annotations to point plots.

 > $\mathrm{plots}:-\mathrm{pointplot}\left(\mathrm{Matrix}\left(26,2,\mathrm{rand}\left(1.0..10.\right)\right),\mathrm{symbol}=\mathrm{soliddiamond},\mathrm{symbolsize}=20,\mathrm{colorscheme}=\left["ygradient",\left["Yellow","Red"\right]\right],\mathrm{annotations}=\mathrm{Array}\left(\left[\mathrm{seq}\left("a".."z"\right)\right]\right)\right)$ 