759 reputation
212
bio website graphics.tu-bs.de
location Germany
age 31
visits member for 1 year, 4 months
seen 1 hour ago

1d
accepted Import multiple files from folder in order of date added
2d
asked Import multiple files from folder in order of date added
Apr
11
comment Running a shell script within Mathematica
I do not want to sound rude, but please try to search for information on the web first, because the answer given below can easily be found there.
Apr
8
comment How to plot particular piecewise defined functions in mathematica
Be aware of the fact that what you presented is a sequence not a function. You could of course define a piecewise constant function which takes the values of a_n, or do a ListPlot (see answer below).
Apr
2
comment How to find out how Mathematica performed an integration?
1) You can use WolframAlpha directly from within Mathematica. Wolfram Alpha uses Mathematica for computations. 2) To find out which Method a certain mathematica routine used, take a look at this thread: mathematica.stackexchange.com/questions/145/…
Mar
29
comment Challenge: Creating Compilable Permutations Function
I think that's a good solution. I will try this out soon, but I do not see why it should not work. Thank you very much.
Mar
29
comment Challenge: Creating Compilable Permutations Function
memory usage should not be a problem, the lists I need to permute usually do not contain more than 8 items, but the permutation process would be part of a highly optimized and compiled function that in return has to be applied frequently in the computation process
Mar
29
asked Challenge: Creating Compilable Permutations Function
Mar
20
comment Distributing value of variable to specific kernel
Thanks, this is what I was looking for. I can't explain why I did not see that in the first place, but whatever :).
Mar
20
accepted Distributing value of variable to specific kernel
Mar
19
comment Distributing value of variable to specific kernel
Essentially my compiled function f does not take very long to compute, but I think long enough to benefit from parallization. If I distributing the whole data array to all kernels takes about as long as calculating the function on a single multicore machine, but if I could split up the data array and only distribute a small fraction I guess the scenario could benefit from parallel computing especially if there are many machines in the distibuted computing cluster.
Mar
18
comment Distributing value of variable to specific kernel
Unfortunately not an option in my more complicated case, that would have taken way longer to explain. Essential is that I need a solution to the problem above because I cannot use ParallelMap. Short version is that in my case f is a listable compiled function and the real parallelism takes place on the compiled level.
Mar
18
asked Distributing value of variable to specific kernel
Feb
27
comment How do I get the length of held list without evaluating the list?
Use Unevaluated instead of Hold or obtain expression where each list entry is wrapped in Hold.
Feb
15
awarded  Citizen Patrol
Feb
13
comment Manipulate aborts
As bill s already said, this looks like a memory problem or some unhandled mathematica error. To check for the first one try bill s's solution and also watch the memory usage of the MathKernel Process with an appropriate System Monitoring tool.
Feb
12
comment Launching Remote Kernels takes a lot of time
Thanks for the feedback. I will take a closer look at what might be going wrong. Any suggestions on how to monitor the LaunchKernel[] process in mathematica?
Feb
11
revised Launching Remote Kernels takes a lot of time
deleted 4 characters in body
Feb
11
revised Launching Remote Kernels takes a lot of time
added further hardware and software information
Feb
11
asked Launching Remote Kernels takes a lot of time