724 reputation
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bio website bsl-support.de
location Germany
age
visits member for 2 years, 9 months
seen 15 hours ago

I am a management consultant with a background in OR and a strong focus on modeling management problems following Forrester's System Dynamics methodology. After years of abstinence from any programming in a spreadsheet dominated industry I discovered Mathematica a couple of years ago and the fascination has not stopped since then.

It seems THE tool - and no, it is not simply a hammer - for the kind of work that needs to be done in my field and I am often suprised anew how far the possibilities go.


15h
comment pattern matching and applying a function, not working as expected
If you use RuleDelayed, e.g. G[x, y] /. a_[b__] :> Total[a @@@ Permutations[List[b]]] it will work. Use yourcode//Trace to see what is happening.
1d
revised What is the difference between Array and Table?
title spelling
1d
suggested approved edit on What is the difference between Array and Table?
1d
comment What is the difference between Array and Table?
While everything is an expression, not everything is a function. Array constructs matrices from functions, Table from expressions. One might note, that using pure functions within Array significantly speeds it up and there is not that much difference to Table I find. In theory both should be open for parallelization, shouldn't they?
1d
comment Bug in ListVectorPlot?
Same on 10.0.2 and Win 7 (64 Bit)
1d
comment Bug in ListVectorPlot?
But did you try to do it repeatedly? v10.0.2 crashes the second or third time it is called on Wind 7 (64 Bit).
1d
comment Bug in ListVectorPlot?
It works at first on v10.0.2 on Windows 7 (64 Bit) but crashes if called again.
Dec
13
comment Why are TimeSeries objects reported with head “TemporalData”?
Seems that nobody has come up with another answer or cares, thus I accept my own thoughts reflecting upon the answer I have gotten from WRI.
Dec
13
accepted Why are TimeSeries objects reported with head “TemporalData”?
Dec
12
comment A possible bug with regard to DateObjects in Version 10?
The performance gap still persists in 10.0.2
Dec
12
comment A possible bug with regard to DateObjects in Version 10?
The problem still persists in Version 10.0.2 - the suggestion bar needs to stay deactivated.
Dec
12
revised A possible bug with regard to DateObjects in Version 10?
unfortunately the update was done to early and had to be removed
Dec
12
revised A possible bug with regard to DateObjects in Version 10?
Added update information
Dec
12
comment More Ticks::ticks errors in AbsoluteOptions in v10
Well, how to be sure, but I had booted Windows freshly, closed all programs, checked MD5 and then the old Version 10.0.1 was removed before the new one got installed. Strange...
Dec
12
comment More Ticks::ticks errors in AbsoluteOptions in v10
Yes, with a fresh notebook and that exact code I do get (among other errors): Axes::axes: "{{True,False},{True,False}} is not a valid axis specification. "
Dec
12
comment More Ticks::ticks errors in AbsoluteOptions in v10
I am running 10.0.2 on Windows 7 (64 Bit).
Dec
12
comment More Ticks::ticks errors in AbsoluteOptions in v10
Sorry, I do not get your Point: PlotStyle -> "Web" does not put up a frame yet still (!) shows Axes::axes and Ticks::ticks bug at the same time. So what has been "fixed" ?
Dec
12
comment AbsoluteOptions prints error messages in V10
I believe that Mr.Wizard might reformulate his question and then that should be the more general instance maybe?
Dec
12
comment More Ticks::ticks errors in AbsoluteOptions in v10
True, but the error is also shown for the Option Axes. Isn't that something different?
Dec
12
comment More Ticks::ticks errors in AbsoluteOptions in v10
The error for Plot has not really been fixed. As adding PlotTheme->"Scientific" quickly shows. So maybe these problems should be treated as one single problem?