Graph a polygonal line through the points 1,2,3,7,4,−2.
To obtain Figure A-9.8(a) interactively, create a degree-one spline via the Curve Fitting Assistant.
Type the list of points 1,2,3,7,4,−2
Curve Fitting≻Interactive Curve Fitting≻x (as variable)
Splines≻ Degree of the spline: 1
On 'Done" return Plot
(See Figure A-9.8(b).)
p1:=plot([[1, 2], [3, 7], [4, -2]],style=line,color=red):
p2:=plot([[1, 2], [3, 7], [4, -2]],style=point,color=black,symbol=solidcircle,symbolsize=20):
Figure A-9.8(a) Polygonal line through given points
Figure A-9.8(b) Use of the Curve Fitting Assistant to obtain a polygonal line as a degree-one spline
Although the Curve Fitting Assistant is most easily launched from the Context Panel, to launch it for this example you can also press:
Enter the list of points.
Graph the polygonal line through the points.
Graph the points.
Combine the graphs of the polygonal line and the points.
The display command in the plots package merges any two or more plot data-structures.
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