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bio website nl.linkedin.com/in/scdevries
location Utrecht, Netherlands
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Jan
17
reviewed Close Treat all variables as local in a module
Jan
17
reviewed Reviewed Create a graph from KML file
Jan
17
comment Create a graph from KML file
You could try a KML to CSV converter. CSV can be imported in Mathematica.
Jan
16
reviewed Close Calculating electrostatic potential from arbitrary charge density
Jan
16
reviewed Leave Open How to create a parallelepiped tiling?
Jan
16
comment Fitting a beta distribution to a probability density curve
@tyler I didn't mean vertically but horizontally. Anyway, for what reason would you want a distribution to a sound spectrum?
Jan
16
comment Help with finding solution for utility function
@anon You can define functions using =.
Jan
15
reviewed Approve Context Sensitive Formatting for a Table
Jan
15
reviewed Close Move the Animation Controls in a Manipulate Slider
Jan
15
answered Function input assistance not working in Mathematica 8?
Jan
15
comment Fitting a beta distribution to a probability density curve
A beta distribution is defined only between 0 and 1.
Jan
15
comment Function input assistance not working in Mathematica 8?
This is a V9 functionality. The closest you can get in V8 is the ctrl-K (completion) and cntrl-shift-K (template) functionality.
Jan
15
comment Tweaking Solve for systems of polynomial equations
With "Mathematica does not give a solution" you mean you let it run for a couple of hours and it didn't finish or did it return but unevaluated?
Jan
15
comment Fitting a beta distribution to a probability density curve
Are you sure about fitting a Beta Distribution to this data? A Beta distribution has a finite support (0..1) which your data doesn't have and an interpretation related to probability, which I find hard to make in the context of frequency spectra of sounds.
Jan
15
revised Fast randomization of a graph, while keeping the graph connected
added 58 characters in body
Jan
15
comment Debug OpenCL installation issues and beignet
Does Trace or TracePrint help?
Jan
15
comment How to find the most compact form of an equation
Often, it helps if you indicate using Assumptions whether certain variables are real, or positive or have some relationship to each other.
Jan
15
comment How to find the most compact form of an equation
...Sometimes it may be useful to provide a ComplexityFunction of your own, to 'punish' certain terms, in the hope that they may then be beaten out of your expression by FullSimplify.
Jan
15
comment How to find the most compact form of an equation
I don't think there is a general recipe. Simplification requires a certain amount of black magic, Fingerspitzengefühl and luck. FullSimplify uses a ComplexityFunction to see if it is getting anywhere, with the general goal to get the value of that function as low as possible. Sometimes it may be necessary to increase the complexity of an expression in order to open up new paths to lower complexity. Those steps may put the achievable reduction too much beyond 'FullSimplify`'s horizon to see...
Jan
15
reviewed Leave Open How to change the MATHEMATICA_USERBASE directory