3,499 reputation
1237
bio website astro.uni-koeln.de/staff/…
location Cologne, Germany
age 44
visits member for 2 years, 9 months
seen 1 hour ago

Astronomer, interested in star formation, interstellar medium, astrochemistry, doing numerical modelling


Sep
28
answered How do I compute sidereal time and JD?
Sep
24
answered Rectangular output for ListContourPlot
Sep
19
comment Fast Spherical Harmonics radiative transfer
@Heike Wow, 3.5 vs. 148.5 seconds. Thank you for the tip.
Sep
19
comment Fast Spherical Harmonics radiative transfer
@J.M. LinearAlgebraMatrixConditionNumber[Table[B[i, m]...` gives 2.63531*10^98 . My comment on the N[#,30] was to remind me that even with N the LinearSolve::luc error occured and that I had to use SetPrecision[#,Infintiy] to get rid of it.
Sep
19
awarded  Nice Question
Sep
18
comment Fast Spherical Harmonics radiative transfer
@J.M.no, didn't notice it. Thanks for the link.
Sep
18
comment Fast Spherical Harmonics radiative transfer
@J.M. Neat! Unfortunately, this is no bottleneck. Still nice to know, thanks.
Sep
18
comment Fast Spherical Harmonics radiative transfer
@J.M. thanks for the edits :)
Sep
18
comment Numerical Differentiation using 1500 data points
@J.M. agreed, but without further knowldge of the posters data it is hard to be more specific. Of course some initial smoothing and hand-massaging of the data might be necessary.
Sep
18
comment Numerical Differentiation using 1500 data points
@ShrabantiDhar That is just an set of example data. Just use your data points (paris of x,y values instead).
Sep
18
asked Fast Spherical Harmonics radiative transfer
Sep
18
answered Numerical Differentiation using 1500 data points
Sep
11
awarded  Caucus
Sep
7
comment How to properly handle mutual imports of multiple packages?
I suppose you don't know: typing all in caps is considered very rude (equivalent to shouting).
Aug
25
comment Using FindFit to fit $a\,b^t$: how to avoid introducing complex numbers?
the "[VeryThinSpace]" part makes me suspicious. CHeck your function and your data using FullForm to see if you realy are trying to fit to numerical data or if something went wrong with the import or the input of the function.
Aug
17
comment How to group the powers of one variable?
This is equivalent to assuming a and b being reals. According to the documentation, PowerExpand always assumes real numbers and integer exponents.
Aug
12
answered Drawing outside Plot area
Aug
1
comment ShowLegend values
Great work, +1! I would like to have the height of the color bar allign with the frame of the plot. I couldn't manage to make both heights identical though. Any ideas how to achieve this?
Jun
26
awarded  Nice Question
Jun
20
comment How to write values of function to file?
@Eddy I updated the answer for the {x,y} pairs.