Math Forum / Math Software / Mathematica / October 2008

I've been trying to export some pictures to eps and pdf and it seems
that there is no way to get rid of those white lines that represent
the polygons used to create the figure.
Try

I am running v. 6.0.3.0
I am having some weirdness where I will do something like:
G=Array[f,100];
For[i=1, i<=100, i++,

I have created a function from a PDF and so it is non-zero on the unit
interval and 0 elsewhere. But when I try to integrate some function of
that function, it is not evaluated. How can I get it to be evaluated?
For example,

I have a long list of numerical values, {x,y,f(x,y)}, representing
the value of a field in the points (x,y). I want to visualize them
using ListContourPlot or ListDensityPlot. I have two poblems:
1. I want to change the colour to a usual scale of Blue-Minimum and

do you know any way to import multiple files
in the mathematica, I would like to do
nonlinear regression for each of these files at one notebook
Is it possible?

Does anyone know what is the most memory efficient way to manipulate
large data sets (200,000 rows and 40 columns) ? I use extract, but
suspect Select may be more efficient.
Also, is there a way to tell how much memory is being used by a

When I ask Mathematica to solve one of my equations, at first it says that the response is long, and asks whether I want the full output, or the output with a size limit.  When I say that I want the full output it comes up with seven roots, each of which has a polynomial which is ...

  I try to encode a hash table in the name of list.
successors[{s_Integer, {{nhu_Integer, nhd_Integer}, {nlu_Integer,
    nld_Integer}}}] := {
 {1, {{nhu + 1, nhd}, {nlu, nld}}},

I am trying to display a 3D graphic in a separate window from my main
notebook.  The idea is that as I'm editing the data driving the
graphic (regardless of where I am in the notebook), I can still see
and manipulate the visualization.

Connection between the above two topics is need to make a crude
inventory (giving author, title, publisher, year of publication) of a
private collection of roughly 1000 technical and scientific textbooks
and reference books acquired during the past 50 years.

Hey folks, I'm new to Mathematica. I'm trying to set up a graph for the
hydrogen 2s state. I just can't get it to work. The code as I have it is:
This always generates errors. Part of the problem is that I don't know
how to specify units for the x and y axes. The x axis should be ...

Dear Mathematica Gurus!
Who know which Mathematica procedure to use to find such a,b,c that
ArcCosh[2]/ArcCosh[2-x]==Hypergeometric2F1[a,b,c,x] for {x,-Infinity,1}
BEST WISHES

I am fitting a function with known errors to determine the Confidence
Intervals of the fitted parameters.
For each data point I have an associated error, that is, the Standard
Deviation of the measurement.

Dear Mathematica Friends,
I'm trying to solve this simple problem: I've got a silicon bar in 1D resolving fourier equation of heat. With these Boundary Condition, mathematica gives me this kind of error. however, solution seems consistent with the problem. Could anybody explain ad ...

The Washington D.C. area Mathematica Special Interest Group will meet
Friday, 31 October, 7:30 to 9:30 a.m. at the SAIC Enterprise Center
building in Tysons Corner (see directions below).
Early risers meet before 7:00 in the morning for admission at the front