848 reputation
216
bio website graphics.tu-bs.de
location Germany
age 32
visits member for 1 year, 9 months
seen 5 hours ago

5h
comment Bug in ClusteringComponents yielding different results on practically same input?
Thanks, I am actually feeling a little bit dumb, that I did not think of that myself. Can anyone think of a similar method that does not run into local optimums (I know that RandomSeed helps, but it has still a random component in it)?
21h
asked Bug in ClusteringComponents yielding different results on practically same input?
Aug
25
comment Listable compiled functions used in NMinimize
Ok, I have not tested this, but in theory this should be possible without any additional hassle. At least when using certain optimization algorithms that only rely on evaluating the objective function directly.
Aug
25
comment Using one complicated equation to reduce another
Take a look at Replace. It might be what you are looking for if you actually have a form that already contains the y_j directly. After replacing you might want to apply Simplify or FullSimplify.
Aug
23
accepted Export Grayscale Bitmap
Aug
22
comment Export Grayscale Bitmap
Ok, definitely not a version 10 problem. Same behavior here on version 9 and I think the answers kind of explain it.
Aug
21
comment Export Grayscale Bitmap
@bills: Yes I did, maybe it is a version 10 problem. I can confirm the problem with version 10 on a Windows and a Mac OS machine.
Aug
21
comment Export Grayscale Bitmap
@Mr.Wizard: Yes I did, without success. There is of course a chance that I was missing something.
Aug
21
revised Export Grayscale Bitmap
added example code
Aug
20
revised Export Grayscale Bitmap
edited body
Aug
20
asked Export Grayscale Bitmap
Aug
16
comment Why does Mathematica simplify $x/x\to1$?
Well if you take a look at it, -(x^2/(x^2)^(3/2)) + 1/Sqrt[x^2] is exactly zero, except at x=0. But From a mathematical standpoint the problem is more like why does mathematicas differential operator D not exclude x=0 in this case.
Jul
31
comment specifying a list (vector) of arbitrary length
@Gleno: exactly, thanks, has been edited
Jul
31
revised specifying a list (vector) of arbitrary length
added 2 characters in body
Jul
31
asked specifying a list (vector) of arbitrary length
Jul
13
comment How can I modify the interval of the function Image[]?
As mentioned by Rahul Narain Rescale should do the job. Be aware that using Image[] afterwards still clips the portion of the intensity values outside [0,1] for viewing purposes (not in the internal representation). Using ImageAdjust on an image will rescale the values to [0,1].
Jul
10
comment Mathematica 10 trial limitations
Ok thanks. It's what I suspected. We will see if Wolfram will change anything in the near future regarding the trial. At least I think it is quite a shame limiting it in that way. Kind of defeats the purpose of testing the new release.
Jul
10
asked Mathematica 10 trial limitations
Jul
3
comment Alternative for MapThread in listable functions
Good advice, I am pretty sure you are right on that one.
Jul
2
awarded  Curious