Re: Two questions
- To: mathgroup@smc.vnet.net
- Subject: [mg11551] Re: [mg11468] Two questions
- From: Des Penny <penny@suu.edu>
- Date: Sat, 14 Mar 1998 13:56:05 -0500
- Organization: Southern Utah University
- References: <199803120634.BAA23655@smc.vnet.net.>
Hi Selwyn: I'll try to answer your 2nd question. There are (at least) two things you can do: 1. Suppose you enter the command "Command[a]" which is actually defined in a Mathematica package that you have neglected to read in. Obviously the command will not execute. You now read in the required package and you find the> command will still not execute (because of shadowing). One way to now cure the problem is to execute: Clear[Command]; Remove[Command]; This clears the variable Global`Command, which is shadowing the variable you want to use. When you next execute "Command[a]" it will now execute properly. 2. There is a very nice package called "AntiShadow.m" that prevents almost all shadowing problems of this type. I believe this is available from MathSource. I suggest you download this and load it automatically each time you boot Mathematica by placing a Needs["AntiShadow`"] command in your init.m file. (While you are at it why don't you download that other great package "CleanSlate.m" and also load it automatically with Needs["CleanSlate`"] ) 3. You could also place a DeclarePackage statement in your init.m file, however I don't recommend this solution. Hope this helps, Cheers, Des Penny > Selwyn Hollis wrote: > > > I have two questions that I hope someone can help me with. > > > > 1) Is there a way to use Plot3D to create a ``wireframe" surface > > plot---that is, showing only the grid curves? (No, Shading->False is > > not what I'm after. I want the plot to be _transparent._) If not, is > > there a better way to do it than plotting curves with ParametricPlot3D? > > > > 2) I am continually forgetting to load a package before entering a > > command that it contains. Is there a way to get out of the resulting > > jam without quitting the kernel? > > > > Thanks! > > > > -- > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Dr. Selwyn Hollis > > Associate Professor of Mathematics > > Armstrong Atlantic State University > > Savannah, GA 31419 USA > > <http://www.math.armstrong.edu/faculty/hollis/> > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Hi Selwyn: I'll try to answer your 2nd question. There are (at least) two things you can do: 1. Suppose you enter the command "Command[a]" which is actually defined in a Mathematica package that you have neglected to read in. Obviously the command will not execute. You now read in the required package and you find the command will still not execute (because of shadowing). One way to now cure the problem is to execute: Clear[Command]; Remove[Command]; This clears the variable Global`Command, which is shadowing the variable you want to use. When you next execute "Command[a]" it will now execute properly. 2. There is a very nice package called "AntiShadow.m" that prevents almost all shadowing problems of this type. I believe this is available from MathSource. I suggest you download this and load it automatically each time you boot Mathematica by placing a Needs["AntiShadow`"] command in your init.m file. (While you are at it why don't you download that other great package "CleanSlate.m" and also load it automatically with Needs["CleanSlate`"] ) 3. You could also place a DeclarePackage statement in your init.m file, however I don't recommend this solution. Hope this helps, Cheers, Des Penny Selwyn Hollis wrote: > I have two questions that I hope someone can help me with. > > 1) Is there a way to use Plot3D to create a ``wireframe" surface > plot---that is, showing only the grid curves? (No, Shading->False is > not what I'm after. I want the plot to be _transparent._) If not, is > there a better way to do it than plotting curves with ParametricPlot3D? > > 2) I am continually forgetting to load a package before entering a > command that it contains. Is there a way to get out of the resulting > jam without quitting the kernel? > > Thanks! > > -- > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Dr. Selwyn Hollis > Associate Professor of Mathematics > Armstrong Atlantic State University > Savannah, GA 31419 USA > <http://www.math.armstrong.edu/faculty/hollis/> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- References:
- Two questions
- From: Selwyn Hollis <shollis@peachnet.campus.mci.net>
- Two questions