Re: Change of Basis function066 (8/26/2006 6:48:20 AM) comp.soft-sys.math.mathematica On 8/25/06 at 5:34 AM, dsboily@fastmail.ca (David Boily) wrote:
>I would like to know if there is a function capable of giving as
>output the representation of a vector in a given basis. For example:
>Fu... Bill
Re: reading all the files in one directory055 (8/23/2006 11:38:03 AM) comp.soft-sys.math.mathematica On 8/22/06 at 5:20 AM, s.figueiredo@biologie.hu-berlin.de (Ana Sofia
Figueiredo) wrote:
>Could anyone please tell me how can a read all the files in one
>directory?
Assuming the working directory is se... Bill
Re: Several functions in a single 2D-plot040 (8/18/2006 8:07:14 AM) comp.soft-sys.math.mathematica On 8/17/06 at 4:18 AM, vginer@gmail.com (Vicent) wrote:
>How can I plot several functions within the same 2D graphic?
>For example, I want to draw the PDF of 3 continuous statistical
>distributions (I me... Bill
Re: FileNames subdirectory count discrepancy173 (8/17/2006 9:03:46 AM) comp.soft-sys.math.mathematica On 8/16/06 at 3:36 AM, chris@chiasson.name (Chris Chiasson) wrote:
>from the help: FileNames[forms, dirs, n] includes files that are in
>subdirectories up to n levels down.
>why does a file that is only ... Bill
Re: No output or In[n] prompt appearing038 (8/16/2006 8:05:38 AM) comp.soft-sys.math.mathematica On 8/14/06 at 6:44 AM, alireza.amirkhizi@gmail.com wrote:
>I have this weird problem. When I enter anything as simple as
>2+2
>and shift+Enter, there is no error or anything. It seems that the
>cell i... Bill
Re: How do I create a parametric expression?053 (8/10/2006 4:05:21 AM) comp.soft-sys.math.mathematica On 8/9/06 at 4:19 AM, axlq@spamcop.net (axlq) wrote:
>I'm trying to figure out how to simplify a large expression so that
>it's expressed in terms of a sub-expression that's factored into the
>larger one.
... Bill
Re: Newbie question about column sums of arrays041 (8/9/2006 8:43:20 AM) comp.soft-sys.math.mathematica On 8/8/06 at 6:29 AM, gwgilc@wm.edu (George W. Gilchrist) wrote:
>I have spent several hours trying to find an answer to what must be
>an incredibly simple problem: how to sum the columns of an array
>cont... Bill
position lists1231 (8/16/2006 8:11:42 AM) comp.soft-sys.math.mathematica have
In: a = {1, 1, 2, 2, 1, 4}
want
{{1, 2, 5}, {3, 4}, {0}, {6}};
more effectively than just
In: Position[a, #] & /@ Range[4]
Out: {{{1}, {2}, {5}}, {{3}, {4}}, {}, {{6}}}
Ideas? Known one-... rychphd(77)
Simple Plot3D/Function Syntax issue729 (8/10/2006 4:03:18 AM) comp.soft-sys.math.mathematica When I enter
f = e^-(x^2 + y^2) (x^2 + 2y^2)
It gives me a syntax::noinfo error but the output looks like the
correct textbook style function.
Also, when I try to plot it
Plot3D[e^-(x^2 + y^2) (x^2 + 2y^... jtolman(11)
MemberQ939 (8/8/2006 10:39:25 AM) comp.soft-sys.math.mathematica Re Mathematica 5.2.0.0.
Since 0.7 is in the set {0.0, 0.1, 0.2,..., 0.9, 1.0}, why does MemberQ[Range[0., 1., .1], .7] return False?
Thankx.
Bruce
... vze269bv(89)
NonLinearRegress Problem436 (8/2/2006 9:27:17 AM) comp.soft-sys.math.mathematica I have the following problem with NonLinearRegress
I have defined the following function
deb[teta_,n_,t]:= 9 n (t/teta)^3 Nintegrate[(x^4
Exp[x])/(1+Exp[x])^2,{x,0,t/teta}]
I can Table this function w... jour(2)
Block v. Module438 (7/27/2006 9:47:40 AM) comp.soft-sys.math.mathematica Re Mathematica 5.2.0.0.
The Module and Block below "should" return the same result, but they don't. The Module's result makes no sense, while the Block's result is what I want.
What's Module doing? The ... vze269bv(89)