7,740 reputation
1134
bio website mertig.com
location Berlin, Germany
age
visits member for 2 years, 6 months
seen yesterday

Being a trained physicist I learned Mathematica while developing FeynCalc. Since then I am stuck with Matheamtica. I do like some other programming languages like Fortran and Java.

I have my own company, GluonVision GmbH, in Berlin, doing mostly (web)Mathematica related consulting and projects.

Lately I became more and more insterested in CDF.

My Email is: Uncompress["1:ejxttmopcuznygaoys9jc8hnlsrjtndlzs8fafppb48="]


Jul
22
comment How to make use of Associations?
Your example mentioned on Hacker News does not quite work on a fresh Mathematica 10.0.0 session on Windows (it does on Linux): Executing titanic = ExampleData[{"Dataset", "Titanic"}];titanic[Histogram, "age"] produces Failure[ ...]. Only titanic = ExampleData[{"Dataset", "Titanic"}]; titanic[#, "age"] &@Histogram or any other previous mentioning (autoloading) of Histogram works. Sometimes I wonder why WRI releases beta versions as .0.0 releases.
Jul
22
comment Is it possible to close Windows Explorer from within Mathematica
Run["taskkill /IM explorer.exe /F"]; Import["!explorer.exe", "Text"]; but the kernel then hangs ...
Jul
16
comment Version 10 of Mathematica in Windows XP
@Vaggelis_Z I don't work for Wolfram. Maybe somebody from Wolfram Research knows why they stopped support for Windows XP. My uneducated guess is that the cloud functionality (login , etc) is impossible to support.
Jul
16
comment Version 10 of Mathematica in Windows XP
wolfram.com/mathematica/system-requirements.html
Jun
18
comment More efficient implementation for comparing coefficient lists in a Do-loop
This needs about 10 seconds: AbsoluteTiming[f[n_, q_] := f[n, q] = Expand[Sum[FunctionExpand[QBinomial[n, j, q]]*q^j^2, {j, 0, n}]]; lhs[n_, q_] := lhs[n, q] = Sum[(-1)^j*q^(j*((5*j + 1)/2)), {j, -n, n}]; rhs32[q_, a_, b_, c_, d_, e_, g_, h_] := Expand[q^a - f[1, q]*q^b*Product[1 - q^i, {i, c, d}] + f[2, q]*q^e*Product[1 - q^i, {i, g, h}]]; list = Flatten[ParallelTable[{{a, b, c, d, e, g, h}, rhs32[2, a, b, c, d, e, g, h]}, {a, 0, 15}, {b, 0, 15}, {c, 1, 5}, {d, c, 5}, {e, 0, 15}, {g, 1, 5}, {h, g, 5}], 6]; pmatch = Select[list, #1[[2]] == lhs[2, 2] & ]]
Jun
8
awarded  Notable Question
Jun
6
awarded  Enlightened
Jun
6
awarded  Nice Answer
Jun
2
comment Matrix/tensor addition behaving funny under replacement?
The real problem is that it only works when you actually can do the replacements before. but sometimes (when generating compilation bodies e.g.) you cannot. I find this a design omittance. See also remarks [here]. (chat.stackexchange.com/transcript/message/15676082#15676082) and here It is always a hassle to work around the missing abstract datatype features of Mathematica (and even the Wolfram Language).
May
31
comment Finding all sets of elements with two common elements in a large dataset
You could let the comparison not go twice, i.e., let the iterators go from {j, 1, n}, {i, j + 1, n} (check out Block[{n = 4}, Do[Print[{i, j}], {j, 1, n}, {i, j + 1, n}]] )
May
24
comment Does the syntax coloring I see indicate a real problem?
Or: Block[{x=HoldForm@x},x]
May
11
comment Non Commutative sorting in Mathematica
@Kuba sure, go ahead.
May
10
comment Why even try the semantic constraints, if expression can't match the pattern structure?
Which Mathematica are you using? In Mathematica 9.0.1 on Windows I get {} for Trace[MatchQ[{7}, {_?OddQ, __}], NumberQ]
May
7
comment Format and TeXForm does not work as expected
@OleksandrR.MakeBoxes does not work with TeXForm as its second argument.
Apr
27
comment Styling differences between CDF in CDF player and in MMA
In Mathematica 9.0.1, ItemParagraph has no opener for me on Windows, using ConfidentialReport stylesheet. Please state your operating system and the Mathematica and CDF versions you are using.
Apr
26
comment How to distribute proprietary Mathematica code
@Jagra No, I just don't know how safe Encode really is ...
Mar
31
answered How to preserve the order of terms in the output
Mar
31
comment How to create a “standard” CDF programmatically?
However, it looks like that for more control (say, you want to have WindowsMargins settings saved in thd CDF), the Epxort method is to be preferred over CDFDeploy (which seems to overwrite any explicit WindowMargins settings).
Mar
9
comment Markup of CDF file, e.g. highlighting text
Call Wolfram Research and ask them to add this to the next version of CDF.
Mar
7
answered Markup of CDF file, e.g. highlighting text