buildq command method

Sorry,

I gave a bad example since plot2d accepts functions inside of a list so you can use makelist.  What I need to do is plot functions that cannot be solved for y in terms of x so I have to use implicit's and draw2d which does not work with lists.

(%i25) load(draw);
    -> C:/PROGRA~1/MAXIMA~1.0/share/maxima/5.15.0/share/draw/draw.lisp

(%i26) str1:"draw2d(implicit(x^1-y,x,0,1,y,0,1)";
    -> draw2d(implicit(x^1-y,x,0,1,y,0,1)

(%i27) for i : 2 thru 20 do str1:concat(str1,",implicit(x^",i,"-y,x,0,1,y,0,1)");
    -> done

(%i28) str1:concat(str1, ")")$

(%i29) eval_string(str1);

This code works but I want to use buildq or some other way and not generate the command as a string and then use eval_string.  Someone said it can be done and the above way was bad coding practice.

Thanks,

Rich








 ------------Original Message------------
From: "Richard Hennessy"<rvh2007 at comcast.net>
To: "Maxima List" <maxima at math.utexas.edu>
Date: Sat, May-3-2008 4:24 AM
Subject: buildq command method

I have a plot using the following code.

str1:"plot2d([x^1";
str1:concat(str1, "],[x,0,1],[plot_format,gnuplot],[legend,false])");
eval_string(str1);

This works but I think I remember someone posting that this can be done better using the buildq command but I have had no success that way.  Could someone show me how to generate this plot with buildq?

Thanks,

Rich




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