8,093 reputation
21143
bio website
location
age
visits member for 2 years, 7 months
seen 8 hours ago

Feb
6
revised How to randomly erode a 3D distribution of points with Mma 7.0?
added 486 characters in body
Feb
6
answered How to randomly erode a 3D distribution of points with Mma 7.0?
Feb
5
comment Circle detection using invariance kernels
@holistic To get help for this kind of "where to even begin" type problem it should be original compared to already existing similar answers in this forum. If you little search this forum you will find many image feature detection related questions and plenty of them have excellent answers to help you with THE start.
Feb
4
reviewed Approve suggested edit on C compilation not working with Visual Studio 2013
Feb
4
revised Creating a function with integral zeroes of the 0th, 1st, and 2nd derivatives
added 2 characters in body
Feb
4
revised Creating a function with integral zeroes of the 0th, 1st, and 2nd derivatives
added 498 characters in body
Feb
4
answered Creating a function with integral zeroes of the 0th, 1st, and 2nd derivatives
Feb
3
answered Shuffle product of two lists
Jan
31
comment Manually specifying distance metric to Nearest slows down calculation
That's a strange coincidence indeed. Yesterday I was trying to use Nearest with mercator distance on a large ($>10^7$) set of geolocations. I compiled the distance function to C but without the octree code performance suffered badly. The default distance function was doing the similar sized job still extremely fast. It will be great if on the fly optimization similar to the default ones could be supported for user defined distance functions. After all we are waiting for a major release this time..the version number $10$ must be very special to everybody..Thx a lot for replying!
Jan
31
comment Manually specifying distance metric to Nearest slows down calculation
Any chance for a better Nearest with more versatile distance function portability...in the next version?
Jan
30
comment ContourPlot3D using a Matlab function through MATLink
@Szablocs I did the same but did not post due to this timing issue. Its better to get the performance related explanation from the developer himself. I am really looking forward to the update of MATLink when the communication overhead becomes really negligible. It is already a great tool but with such an update MATLink will be a killer app.
Jan
30
revised ContourPlot3D using a Matlab function through MATLink
edited tags
Jan
29
reviewed Approve suggested edit on Using Multiple Kernels When Making Plots
Jan
28
comment Combination of linear programming with bilevel optimization
Please notice that according to the current formulation as far as the final objective is concerned inside of your $\min$ you are doing an illegal convex combination (or say addition) between a scalar $f(x,y,w)$ and $\alpha$ which is a vector by definition of the linear constraint!
Jan
26
awarded  Yearling
Jan
25
comment Sparse Principal Component Analysis
Did you give RLink a try? Its meant for such purpose where you can mix and use existing R code/library on the fly from your Mathematica code.
Jan
24
comment Differential equation of a physical property which can not be below zero
@gogoolplex Please check the WhenEvent doc properly. I am sure you can make it "come back" even with a r=Sin[t]. There are such coming back examples in the doc!
Jan
24
revised Differential equation of a physical property which can not be below zero
edited body
Jan
24
answered Differential equation of a physical property which can not be below zero
Jan
22
awarded  Custodian