35,620 reputation
883184
bio website nl.linkedin.com/in/scdevries
location Utrecht, Netherlands
age
visits member for 3 years, 2 months
seen 3 hours ago

Email: "1:eJxTTMoPCpZiYGAozspPLUrRS9ZLSS0rykwtdkjPTczM0UvOzwUAvgoLoQ=="


11h
comment 4th-order Runge-Kutta method to solve a system of coupled ODEs
Please post Mathematica code, not Latex
11h
comment 4th-order Runge-Kutta method to solve a system of coupled ODEs
I see a few cases of extra ] brackets thrown in in the "k2=" line.
21h
comment Delete the white areas in GraphicsGrid
Should have written n >1 as well.
1d
comment Call functions from a notebook inside C#
So, you read the documentation. Is there anything specific that is not clear there?
1d
comment DatePlus and DayPlus perform much worse than my user-defined-function
Many of the built-in date functions are very slow. For bulk data I usually use my own functions.
2d
comment Returning multiple results from compiled functions in M10
Could you specify what you mean by "I tried all the suggestions in the mentioned post without any luck."? What specifically was wrong with those solutions?
2d
comment Tools for factoring large numbers
I'm voting to close this question as off-topic because the OP seems to be merely interested in factorization performance of computers in general. No specific Mathematica angle is present.
2d
comment Tutorial for Map, Apply, etc
On this site you can find some short animations explaining a few of Mathematica's basic commands (like Map and Apply).
2d
comment Find confidence interval for negative binomial using Mathematica
@ben18785 And one final update...
2d
comment Plotting the space-coordinate path of a projectile
Y[0] calls y[-1] which is undefined. It also calls Vy[0], which calls Vy[-1] which is also undefined.
2d
comment Catch and Throw command
For its calculation Vx[1] needs Ax[0], which, on its turn, needs Vx[-1] which is undefined
Mar
25
comment Find confidence interval for negative binomial using Mathematica
@ben Sorry, no paper refs, but it's actually not that complex. I added a bit of explanation above.
Mar
25
comment Find confidence interval for negative binomial using Mathematica
@ben18785 tiny update: separated sample size and the parameter n.
Mar
25
comment Delete the white areas in GraphicsGrid
Actually with n rows and m columns with m>1 it should be (n-1)/(m-1) / GoldenRatio for reasons not entirely clear to me.
Mar
25
comment Delete the white areas in GraphicsGrid
Use (n-1)/GoldenRatio, with n the number of image rows (of two images). It's not quite what I would say intuitively but it works (of course, this works only for images that start at an aspect ratio of 1/GoldenRatio. If not, modify correspondingly.)
Mar
25
comment Find confidence interval for negative binomial using Mathematica
@ben see update
Mar
25
comment Find confidence interval for negative binomial using Mathematica
Just take out the Quantile block from the first block of code and evaluate that. It will give you the analytic result.
Mar
25
comment Find confidence interval for negative binomial using Mathematica
You need to be a bit clearer about your purpose. Do you need the interval within which 95% of the m variates drawn from NegativeBinomialDistribution[n, p] fall? Or do you want the CI around the measured mean describing the 95% probability of the position of their real mean?
Mar
25
comment Are there examples that arrange graphs or plots with Mathematica?
Related to or duplicate of: 6877, 28041, 52270,37465.
Mar
25
comment Are there examples that arrange graphs or plots with Mathematica?
For those wondering about SciDraw: It's the successor of LevelScheme (which is mentioned in many questions and answers).