Mathematica
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formatted table output to ascii file Hi, make all you numbers precision numbers (e.g. using N) otherwise Mathemaitca will try hard to give an exact representation. Further the problem with the lone "e" is solved by e.g.: Export["d:/tmp/t.txt", ScientificForm[TableForm[table], 4, NumberFormat -> (Row[If[#3 == "", {#1}, {#1, "e", #3}]] &)], "S... 17 Jun 2010 02:27
Solve and Big Memory needed Dear Experts/Adam Strebonski, I have been trying for several years to solve a set of simultaneous polynomial equations. Since the algorithms used by Mathematica are guaranteed to find solutions to these types of equations it should be a slam-dunk. However I have been frustrated by memory limitations (Windows ... 16 Jun 2010 06:40
Using Mathematica for Electrophysiology Data Analysis Hi, I'm playing around with Mathematica to analyze some electrophysiology data; this is on my recreation time, so apologies if the following questions are very basic. I've imported data (pairs of time points and amplitudes) from pClamp into Mathematica as lists. The lists are pretty huge (around 150,000 ... 18 Jun 2010 01:32
ListCorrelate (v 7.0) Can anybody tell me why the two ListCorrelate s don't evaluate to the same thing? \[Psi] = {{0, 0, 0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0, 0, 0, 0}, {0, 0, 0, 1, 0, 0, 0, 0}, {0, 0, 0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0, 0, 0... 16 Jun 2010 06:39
Normal with GeometricTransformation The "More Information" for the GeometricTransformation function states: "Normal[expr] if possible replaces all GeometricTransformation[Subscript[g, i],\[Ellipsis]] constructs by versions of the Subscript[g, i] in which the coordinates have explicitly been transformed." I just wonder if "if possible" ... 21 Jun 2010 02:35
How to construct symmetric matrix from just a one half *Here is a way, but there could be other elegant ways than this! *In[8]:== mat1=={{1,0,0,0},{2,3,0,0},{4,9,5,0},{2,2,3,4}}; In[12]:== Union@@@MapThread[List,{mat1,MapThread[List,mat1]}] Out[12]== {{0,1,2,4},{0,2,3,9},{0,3,4,5,9},{0,2,3,4}}* *--- 2010/6/15 dragec <culinovic(a)gmail.com> 1 0 0 0 2 3 ... 16 Jun 2010 06:40
How to construct symmetric matrix from just a one dragec wrote: please help me with simple to apply function that will construct symmetric matrix from given just a half matrix with diagonal. Eg: From: 1 0 0 0 2 3 0 0 4 9 5 0 2 2 3 4 To give: 1 2 4 2 2 3 9 2 4 9 5 3 2 2 3 4 Any of these shoul... 17 Jun 2010 02:27
organization of many notebooks What's a good way to make a list of these notebooks: many files in many directories, and each has cell tags. I would like a kind of index that references all the cells in all the notebooks by their cell tags. Is AuthorTools good for this? It seems to want that I would remake all of the cell tags. Chris ... 15 Jun 2010 03:15
Simplification question I'd like to verify that the following expression is true for a,b real. It seems to hold numerically. 1/2 Log[(Exp[a + b] + Exp[-a - b])/(Exp[-a + b] + Exp[a - b])] == ArcTanh[Tanh[a] Tanh[b]] I tried Reduce and combinations of TrigToExp/Simplify with no luck, any suggestions? ... 17 Jun 2010 02:27
Washington DC Area Mathematica Special Interest Group Mathematica SIG (http://web.me.com/hrbishop.pmsi) MEETING 18 June 2010, 7:30 am Science Applications International Corporation (SAIC) 8301 Greensboro Drive McLean VA Southern Corner of Westpark Drive and Greensboro Drive Agenda 1. Prepared Talks "Find the probability that the discriminant will be ... 15 Jun 2010 03:15 |