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Jan
30
accepted Differential equation of a physical property which can not be below zero
Jan
24
comment Differential equation of a physical property which can not be below zero
I prefer this over PlatoManiacs solution, but also here a stays at 0 and does not "come back" when r=Sin[t], please see may edit in the Question. I guess I was not clear about that.
Jan
24
revised Differential equation of a physical property which can not be below zero
added 192 characters in body
Jan
24
comment Differential equation of a physical property which can not be below zero
Ok, interesting, but quite complicated, I was hoping for an more simple solution and with using DSolve. Also if this method is used with say r=Sin[t] then, the a value sticks to 0 and does not come back. So maybe my approach with manipulating the DSolve result is not so bad.
Jan
24
comment Differential equation of a physical property which can not be below zero
@b.gatessucks , yes thanks, but thats basically the same as in my code example only in a nicer formatted way. But can I already demand that a can not be below 0 inside Dsolve?
Jan
24
asked Differential equation of a physical property which can not be below zero
Jan
18
comment Global variable initialization in packages
Ok, but how to you proceed if I want to define a constant which should be used in the notebook which loads the package?
Nov
29
comment Sensitivity Analysis: Global Sensitivity and Screening
Since it is possible now in Mathematica 9 to use R it should be possible use an R package. I will report back when I had success with it.
Oct
19
awarded  Commentator
Oct
17
awarded  Editor
Jul
25
comment How to create hedcut style images?
I like the failed attempt on Putin!
Jul
23
asked Sensitivity Analysis: Global Sensitivity and Screening
Jul
11
awarded  Supporter
Jul
2
accepted Evaluation inside Button stops after some seconds
Jul
2
comment Evaluation inside Button stops after some seconds
Thanks! That was exactly what I wanted.
Jul
2
asked Evaluation inside Button stops after some seconds
Jun
26
awarded  Scholar
Jun
26
accepted Returning Replacement Rules in a function and using it later on
Jun
26
comment Returning Replacement Rules in a function and using it later on
thanks, I use now the method "H"->H, because this makes it easier to read
Jun
26
comment Returning Replacement Rules in a function and using it later on
yes that is a good point, I am doing it now like this