8,204 reputation
1339
bio website mertig.com
location Berlin, Germany
age
visits member for 2 years, 9 months
seen 3 mins ago

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="]


Oct
17
comment Upload a file using a WolframCloud WebForm
Why don't you contact Wolfram support? They should really be able to figure this out. If you don't get an answer by Tuesday let me know: I will be at the WRI conference and can ask around.
Oct
16
accepted What is special about 70.329862 and InputField and Number and Dynamic?
Oct
16
comment What is special about 70.329862 and InputField and Number and Dynamic?
@kirma: very nice analysis. But I am going to accept Michael E2's answer because it provides a fix ( the greatest thing of M is that knowledgable users can fix bugs way ahead of WRI).
Oct
16
comment What is special about 70.329862 and InputField and Number and Dynamic?
I prefer Number as second argument of InputField rather than String. This way users really only can enter numbers. If I put your FrontEndPrivateToSimpleNumberBoxes definition into the Initialization of the DynamicModule things just work in PlayerPro 9.0.1 (still no PlayerPro 10, unfortunately. But I am sure we will enjoy it soon).
Oct
16
revised What is special about 70.329862 and InputField and Number and Dynamic?
edited title
Oct
16
comment What is special about 70.329862 and InputField and Number and Dynamic?
Great! This is just perfect for everyday use!
Oct
16
comment What is special about 70.329862 and InputField and Number and Dynamic?
Off[NumberForm::sigz] fixes this
Oct
16
comment What is special about 70.329862 and InputField and Number and Dynamic?
I do think this is a bug of InputField[ ..., Number] . I really really wish WRI would stop doing anything new for two or three years and just fix all the old bugs...
Oct
16
comment What is special about 70.329862 and InputField and Number and Dynamic?
Maybe it is just a matter of change $MachinePrecision to MachinePrecision, since SetPrecision[70.329862, MachinePrecision] gives 70.329862
Oct
16
comment How to Use Mathematica as a C/C++ compiler
Roger Germundsson mentioned some years ago at a conference that they were thinking about it.
Oct
16
comment What is special about 70.329862 and InputField and Number and Dynamic?
Nein nein! This is from a real world project and it is a real number (molar percentage).
Oct
16
comment How to Use Mathematica as a C/C++ compiler
Though Mathematica does include Java. Why not a C compiler?
Oct
16
asked What is special about 70.329862 and InputField and Number and Dynamic?
Oct
15
comment Upload a file using a WolframCloud WebForm
xlsfile = "F:\\cloud\\test.xlsx"; CloudDeploy[ FormFunction[ "fname" -> Interpreter[Restricted["UploadedFile", "XLSX"]][ File[xlsfile]], # &], Permissions -> "Public"] at least evaluates and uploads the local xlsfile, but I don't quite know how to incorporate an html input field for file uploading. Maybe it is possible with some JavaScript embedding or some such, but I am short of time now.
Oct
15
comment Equivalent command to the Maple indets command
Do not use Subscript and do not use Notation for anything non-trivial. What I sometimes do is something like MakeBoxes[x1, _] := InterpretationBox[SubscriptBox["x", 1], x1] and then you can input x1 and get displayed a subscripted x1 and it also behaves nice w.r.t. to InputForm and Variables etc.
Oct
15
comment Equivalent command to the Maple indets command
But E is not considered to be a variable by Variables. Maybe add something like Function[z, Context[z] =!= "System`"] or some such.
Oct
15
comment Total much slower in version 10
There are so many slow-downs in M10 that there have to me more bug-fix releases. I just go on mostly with V9 for the time being. Groetjes, Rolf
Oct
15
revised Exporting a .xlsx file with about 500 columns
tested on 10.0.1 and added "and 10"
Oct
15
comment Exporting a .xlsx file with about 500 columns
Yes, the support answer is not useful at all. Looks like the Wolfram developers are still very busy with fully supporting XLSX, since in 10.0.1 it seems not to work (at least on Windows).
Oct
9
comment GCC compiler options passed by Mathematica
Try : "CompilerInstallation" -> "C:\\Program Files\\mingw-builds\\x64-4.8.1-posix-seh-rev5\\mingw64"