Re: Graphing Functions

*To*: mathgroup at smc.vnet.net*Subject*: [mg27332] Re: Graphing Functions*From*: "Allan Hayes" <hay at haystack.demon.co.uk>*Date*: Wed, 21 Feb 2001 03:17:08 -0500 (EST)*References*: <96asca$6f6@smc.vnet.net> <96iqrq$d9u@smc.vnet.net> <96t8ke$ppu@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

> is there a way to turn off Mathematica's > intelligent default for scale of the y axis? I would like to look at the > functions in a "square" format. With default: scaling to aspect ratio (height/width) = 1/GoldenRatio = 0.618034} In[6]:= Plot[Sin[x], {x,-Pi,Pi}] Make it square In[9]:= Plot[Sin[x], {x,-Pi,Pi},AspectRatio \[Rule]1] Prevent any scaling - take the numbers automatically as they come. In[8]:= Plot[Sin[x], {x,-Pi,Pi},AspectRatio \[Rule]Automatic] > Oh, and just what is the name of the Wolfram book on defining functions and > the use of patterns? I ordered two more from Amazon tonight and I suppose I > could order one more. Please also check out the Help Browser: all of Stephen Wolfram's , The Mathematica Book, is there on line plus demos plus full information about the standard add-on packaged - when you need them. We also have direct access to the information from within notebooks: Type Plot in a notebook; select it and use menu > Help > Find Selected Function (or keyboard equivalent). -- Allan --------------------- Allan Hayes Mathematica Training and Consulting Leicester UK www.haystack.demon.co.uk hay at haystack.demon.co.uk Voice: +44 (0)116 271 4198 Fax: +44 (0)870 164 0565 "nsnn" <mailto:dontreply at tothis.ok> wrote in message news:96t8ke$ppu at smc.vnet.net... > Brian (and Alberto, Paul, Peter, Allan and Brian)- > > Thanks for the guidance! > > Brian - It seems that you have hit on my problem. I will get errors with > some very simple functions and not with others. As soon as I think I have > it figured out I get errors.... > > another question when plotting - is there a way to turn off Mathematica's > intelligent default for scale of the y axis? I would like to look at the > functions in a "square" format. (does this make any sense? I guess I just > want the output to be more like a standard graphing calculator...) > > Oh, and just what is the name of the Wolfram book on defining functions and > the use of patterns? I ordered two more from Amazon tonight and I suppose I > could order one more. I had no idea what this program could do when I > ordered it, and now that I realize the potential I would like to figure it > out. > > > > "Brian Higgins" <bghiggins at ucdavis.edu> wrote in message > news:96iqrq$d9u at smc.vnet.net... > Type in these variations after you have openend a new notebook: > > Plot[x^3-3x,{x,0,3}] > > or > > f=x^3-3x > Plot[f,{x,0,3}] > > or > > f1[x]=x^3-3x > Plot[f1[x],{x,0,3}] > > or > > f2[x_]=x^3-3x > Plot[f2[x],{x,0,3}] > > Now try the following > > Plot[f2[t],{t,0,3}] > Plot[f1[t],{t,0,3}] > Plot[f[x],{x,0,3}] > Plot[f(x),{x,0,3}] > > In the last four statement, the first will work , but the the others > will produce errors. To understand what is going on try to read the > Wolfram Book on defining functions and and use of patterns. There is > also the possibility of using delayed assignments for your definitions > of functions (f4[x_]:=x^3-3x) which I have not mentioned. > Hang in, the learning hill is somewaht steep initially, but once you > get to the top the view of possibilities is spectacular! > > > Brian > > >