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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /info/examples/lgc2/4-4-6.mp
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+% --- start of displayed preamble in the book ---
+
+% --- end of displayed preamble in the book ---
+defaultfont:="ptmr8r";
+warningcheck:=0;
+beginfig(1)
+numeric r,pr,x,rmin,rmax,ur,ux;
+rmin=1.9;
+rmax=3;
+ur=5cm;
+ux=6cm;
+r:=rmin;
+pr:=(rmax-rmin)/250;
+for i=1 upto 250:
+ x:=.3;
+ for j=1 upto 50:
+ x:=(1+r)*x-r*x*x;
+ endfor;
+ for j=1 upto 50:
+ x:=(1+r)*x-r*x*x;
+ draw (r,x) xscaled ur yscaled ux;
+ endfor;
+ r:=r+pr;
+endfor;
+
+
+endfig;
+end;