things with lines and labels. I decided that I needed a circle,

and following Gavin LaRose's problem 3 I decided that maybe I could just plot the upper and lower semi-circles

using plot_function to get my circle. I could not find any

documentation other than the problem, so I used the monkey see - monkey do version and something went wrong. I would appreciate help in finding the error here which might cause me to actually understand what I am

doing.

Ken Appel

### Error messages

`syntax error at (eval 2508) line 29, near "])" `

### Error details

Problem1 ERROR caught by Translator while processing problem file:probs/prob1.pg **************** syntax error at (eval 2508) line 29, near "])" **************** ------Input Read 1 DOCUMENT(); 2 loadMacros( 3 "PGstandard.pl", 4 "MathObjects.pl", 5 "PGgraphmacros.pl", 6 ); 7 8 #This is the initialization section of the problem. Note that we need to include 9 #PGgraphmacros.pl to use graphs in the problem. 10 11 # make sure we're in the context we want 12 Context("Numeric"); 13 $func = Compute("sqrt{1-(x-3)**2}"); 14 15 $ymin= 2; 16 $ymax =4; 17 18 # the domain is 19 $xmin = 2; 20 $xmax = 4; 21 # and the number of gridlines we graph 22 $xgrid = 5; 23 24 $ygrid = 5; 25 26 # now initialize the graph 27 $graph = init_graph(0,0, 5,5), 28 axes=>[0,0], grid=>[$xgrid,$ygrid], 29 size=>[200,200]); 30 31 plot_functions( $graph, "$func for x in " . 32 "<$xmin,$xmax> using color:blue " . 33 "and weight:2"); 34 35 36 TEXT(beginproblem()); 37 Context()->texStrings; 38 BEGIN_TEXT 39 Consider the graph 40 $BR 41 $BCENTER 42 \{ image( insertGraph($graph), tex_size=>100, 43 height=>150, width=>150, 44 extra_html_tags=>'alt="graph of a ' . 45 'downward opening parabola with ' . 46 'x-intercepts ' . $root1 . ' and ' . 47 $root2 . ', and y-intercept ' . 48 $yint . '."' ) \} 49 $ECENTER 50 51 52 END_TEXT 53 Context()->normalStrings; 54 ENDDOCUMENT();