Re: Beginning syntax problems

*To*: mathgroup at smc.vnet.net*Subject*: [mg104582] Re: [mg104538] Beginning syntax problems*From*: Tomas Garza <tgarza10 at msn.com>*Date*: Wed, 4 Nov 2009 01:36:58 -0500 (EST)*References*: <200911030755.CAA01540@smc.vnet.net>

Perhaps the following (slightly simpler) code will help: Manipulate[Row[{Panel@Graphics[{Line[{{-4,-4 m+b},{4,4 m+b}}],{Dashing[{0.005,0.005}],Line[{{1,0},{1,m+b},{0,m+b}}]}},Axes->True,AxesLabel->{x,"y=mx+b"},PlotRange->{{-5,5},{-5,5}}],Grid[Prepend[Table[{x,PaddedForm[m x+b,{3,1}]},{x,-5,5}],{"x","y"}],Frame->All,Alignment->Right]}],{{m,2},-2,2,Appearance->"Labeled"},{{b,1},2,-2,Appearance->"Labeled"}] Tomas > Date: Tue, 3 Nov 2009 02:55:53 -0500 > From: mgreene at csumb.edu > Subject: [mg104538] Beginning syntax problems > To: mathgroup at smc.vnet.net > > I'm coaching a middle school Mathcounts program and am attempting to use > Mathematica to illustrate some simple ideas. I've created the following > script to illustrate slope and intercept. > > Grid[{{Manipulate[ > Graphics[{{Dotted, Line[{{1, 0}, {1, m + b}}]}, {Dotted, > Line[{{0, m + b}, {1, m + b}}]}, > Annotation[Line[t = {Table[{x, m*x + b}, {x, -5, 5}]}], "Line", > "Mouse"] > }, Axes -> True, AxesLabel -> {x, "y=mx+b"}, > PlotRange -> {{-5, 5}, {-5, 5}}], {b, 2, -2, -.5, > ControlType -> None}, > Row[{"m", > Manipulator[Dynamic[m], {2, -2, -.5}, Appearance -> "Labeled", > ImageSize -> Small], "b", > Manipulator[Dynamic[b], {2, -2, -.5}, Appearance -> "Labeled", > ImageSize -> Small]}]], > Grid[{"x", "y", > Grid[Table[{x, Dynamic[m]*x + 2}, {x, -5, 5}], > Frame -> {All, False}]}]}}] > > My problems with the script are twofold. First, I can't get the table on the > right side to dynamically update its values as I adjust the slope and > intercept. The second problem is I'm having a heck of a time placing labels > on top of their respective columns in the same table. I'm just trying to put > an x and a y above the two table columns but can't figure out the correct > Mathematica syntax to make it happen. > > Can anyone correct the above script so it exhibits those two features? > > Thanks, > > Michael green > >

**References**:**Beginning syntax problems***From:*Michael Greene <mgreene@csumb.edu>