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Diffstat (limited to 'Master/texmf-dist/doc/metapost/bpolynomial/examples.mp')
-rw-r--r-- | Master/texmf-dist/doc/metapost/bpolynomial/examples.mp | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/Master/texmf-dist/doc/metapost/bpolynomial/examples.mp b/Master/texmf-dist/doc/metapost/bpolynomial/examples.mp new file mode 100644 index 00000000000..135b7881fdc --- /dev/null +++ b/Master/texmf-dist/doc/metapost/bpolynomial/examples.mp @@ -0,0 +1,73 @@ +input bpolynomial; +input graph +prologues := 3; + + +beginfig(1); + newBPolynomial.f(2, 0, -3, -1); + draw f.getPath(-2, 2) xscaled 1cm yscaled 0.1cm; +endfig; + + +beginfig(2); + newBPolynomial.f(2, 0, -3, -1); + for x=-2 step .25 until 2: + label(btex $\star$ etex, (x, f.eval(x)) xscaled 1cm yscaled 0.1cm); + endfor +endfig; + + +beginfig(3); +numeric u; +u := 0.5cm; + %%% Draw a coordinate system. + xmin := -5; xmax := 6; + ymin := -5; ymax := 6; + drawarrow ((xmin,0)--(xmax,0)) scaled u; + drawarrow ((0,ymin)--(0,ymax)) scaled u; + drawoptions(withpen pencircle scaled 1bp); + %%% Define polynomial f of degree 2. +path f[]; + newBPolynomial.f(0, 0.5, -2, 0); + f1 := f.getPath(-2, 0); + f2 := f.getPath(0, 4); + f3 := f.getPath(4, 5.5); + draw f1 scaled u dashed evenly scaled 2; + draw f3 scaled u dashed evenly scaled 2; + draw f2 scaled u dashed withdots + withpen pencircle scaled 1.5bp withcolor .5white; + %%% Define polynomial g of degree 3. +path g; + newBPolynomial.g(0.3, 0, -3, -1); + g := g.getPath(-3.5, 4); + show g; + draw g scaled u; + %%% Write table with some points of g to log file. + show "Polynomial: " & decimal g.a & "x^3+" & decimal g.b + & "x^2+" & decimal g.c & "x+" & decimal g.d; + for x=-5 upto 5: + show (x, g.eval(x)); + endfor +endfig; + + +beginfig(4); +path f,g; + xmin := -7; xmax := 7; + ymin := -7; ymax := 7; + newBPolynomial.f(0, 0.5, -2, 0); + f := f.getPath(xmin, xmax); + newBPolynomial.g(0.3, 0, -3, -1); + g := g.getPath(xmin, xmax); + draw begingraph(10cm, 6cm); + setrange(xmin,ymin, xmax,ymax); + autogrid(grid.bot, grid.lft) + dashed withdots withpen pencircle scaled .7bp withcolor .5white; + drawoptions(withpen pencircle scaled 1bp); + gdraw f dashed evenly scaled 2; + gdraw g; + drawoptions(); + endgraph; +endfig; + +end |