Mathematica

Histogram
Hi I wish to make a histogram, but the size of each bin should be infinitely small. So I am actually looking for something that plots the coordinate (x,y), where x is the value of something and y is the number of times the value x appears in the list. I tried BarChart and Histogram, but no luck. You guys have ... 30 Mar 2010 06:07

derivatives and subscripts
I try to use subscripts as much as possible even for defining functions of say x,y,z....Note that I use the palette to do this which I can't reproduce here....example.....defining the 'x' component of the Electric Field which is a function of Cartesian coordinate 'x'...... E subscript Script x [x] where t... 31 Mar 2010 07:36

Multi-dimensional Fourier series
I measured the temperature of several points in a 3-dimensional space, and want to curve-fit the results to a "simple" function. Sine/cosine functions are the most obvious choice, but how do you Fourier transform 3-dimensional data? And what exactly is a 3-dimensional Fourier transform? I'm guessing it's the... 29 Mar 2010 08:00

Transformation of 3D Objects to 2D Parallel-projection
At school one normally uses a parallel-projection to visualize 3D Objects. I wrote some routines to map 3D-coordinates to 2D using the transformation proj[{x_,y_,z_}]:={y-x/2,z-x/2} But this doesn't work for all kind of 3D-objects. At the moment I can use my routines to map objects build of Point[], Line[] a... 30 Mar 2010 06:07

A general problem with numerical functions defined
This kind of issue has been addressed before. See, e.g., mg39711. The method: change the definition so that it reads: f[x_?NumericQ]:= .... On 3/27/2010 6:10 AM, ValeX wrote: let's say that i have a numerical function f[x] which is defined in a quite messy way. For example, it could be defined as... 28 Mar 2010 05:43

Running Mathematica code using DOS
Hi, I want to run Mathematica with DOS Command. My purpose is to launch a Mathematica program written in .nb file or in .txt file and to execute it. Can you please help me? Many thanks. ... 6 Apr 2010 07:28

Combinations Dispositions Permutations TREE
Given a list l of n objects, I want to choose k elements, with or without repetitions I wrote some functions to find the number and the elements of dispositions Disp[n_, k_] := n!/(n - k)!; ElDisp[l_, k_] := Permutations[l, {k}]; DispRip[n_, k_] := n^k; ElDispRip[l_, k_] := Tuples[l, k]; permutations Pe... 5 Apr 2010 08:17

Printing large PDF files generated from Mathematica
Hi fellow Mathematica afficionados I am having difficulty printing large PDF files generated from Mathematica. I first generate the material as ExpressionCell[] and TextCell[] objects and generate the Mathematica document containing these cells using the command nb = CreateDocument[{Cells}]. I then use Notebook... 28 Mar 2010 05:43

A general problem with numerical functions defined in a messy way
let's say that i have a numerical function f[x] which is defined in a quite messy way. For example, it could be defined as a Module that contains If, Whiles, interpolation functions, Import, .. This function works well without any error if I simply evaluate it, for example if i write f[5] and hit the enter key. ... 29 Mar 2010 09:06

Adding data to excel sheet (v7.0)
Hi, suppose I have a prepared Excel sheet which already contains numbers and some writing. However, the sheet is not complete because I would like to add some results from Mathematica. How do I just add the results and not overwrite the whole file. Example: Suppose the prepared excel file contains in cell A... 1 Apr 2010 07:53