Re: Re: plot

*To*: mathgroup at smc.vnet.net*Subject*: [mg58217] Re: [mg58194] Re: [mg58184] plot*From*: "Bosch, Darrell" <bosch at vt.edu>*Date*: Thu, 23 Jun 2005 05:33:54 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com*Thread-index*: AcV293Ka0XkkBOz3TnOA+gtp/BqQBgALUZ+w

Dear Group: I think some of the errors may be due to copying from a Mathematica notebook directly to the email. Some of the cells are in Input form and don't translate to the email as they appear in the notebook. In a separate email, David suggested converting Input cells to Inputform as a precaution when sending code to the group. I will try to remember that in the future. Thanks, Darrell Bosch -----Original Message----- From: David Park [mailto:djmp at earthlink.net] To: mathgroup at smc.vnet.net Subject: [mg58217] [mg58194] Re: [mg58184] plot [Some of the errors mentioned come from problems with how email is transmitted. If posts are not pure ascii they can sometimes contain extra spaces or = signs. I try to detect these but it it not always possible - moderator] Your code is full of errors. Many symbols are undefined so there is no way one could calculate a value or make a plot. What is something like elev(r) supposed to mean? What is Lo=g[size] supposed to mean? In one place you type 'siz e' with an extra space. No piece of what you have posted makes any sense or will evaluate, including the very first statement. If you cleaned up your typing and provided definitions for all the symbols you might actually find that it worked, or at least be in a position to get some useful help. David Park djmp at earthlink.net http://home.earthlink.net/~djmp/ From: Bosch, Darrell [mailto:bosch at vt.edu] To: mathgroup at smc.vnet.net Dear Group, Thanks to several of you for providing good suggestions to my previous inquiry. In the program below I am trying to solve an equation for v, derive the solution with respect to size, and plot the resulting solution. The problem I have is in running the plot command. I am trying to set numerical values for variables in the derivative (other than size) and plot the derivative for size, but Mathematica won't recognize the settings for the other values. Would appreciate any suggestions. Darrell sol=Log[v]==-0.829923*(Log[size])+0.05652*(Log[size])^2+.000737*(Lo= g[siz e])^3-.002805*pop+.288472*(Log[elev])-.020531*soil1-.086192*soil2-.10992 9*Log[x]+.15501*Log[y]-.192311*Log[mall]+.024088*Log[town]+.044958*year sol2=Solve[sol,v] sol3=D[v /. sol2[[1]],size] Plot [Evaluate[sol3/. elev(r)379.82, soil1(r)0, soil2(r)1,mall(r)8861.89,town(r)8828.68,pop(r)5.9,x(r)24888.27,y(r)16881 .90,year(r)0,{size,100,1000}]]