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Apr
11
comment Connecting to a SQL Server Instance
Did you try "Name"->"XYZ_Database"? To me databasename = "XYZ_Database" does not look like a correct syntax..
Feb
25
comment Connecting to Raspberry Pi's Wolfram Language kernel from a PC's Mathematica front end
@bills That is so much true for me too!! My MMA plate is not finished and I am always greedy for new items...we all are human after all...
Feb
24
comment Fast way to extract data from a list
Compile can also speed up the creation a lot...but be careful with large integer handling!
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.
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
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
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
15
comment Fast randomization of a graph, while keeping the graph connected
@Szabolcs It will be surely biased at its current state. But improvement can be made I guess...Whats your say?
Jan
10
comment Analytical model fitting
@bobthechemist Nope! I could not find anything as such.
Dec
9
comment Store results of inequality
Try evaluating t[[All,2]] or f/.t
Dec
3
comment Using J/Link to decode Google Maps Polyline strings
@MarkMcClure Was a great help for me today! +1
Nov
30
comment Can Mathematica determine part-of-speech for each word in a text?
That's a fast implementation..you guys are fluent in more than one language, I really envy that.+1
Nov
30
comment Can Mathematica determine part-of-speech for each word in a text?
@IstvánZachar what about this well known applications nlp.stanford.edu/software/tagger.shtml and the nlp.stanford.edu/downloads/tagger.shtml . Can we port them to Mathematica easily...and build on other functionalities based on them.
Nov
29
comment Exporting SmoothHistogram plot data
Try First@Cases[SmoothHistogram[something ...], Line[a___] :> a, Infinity]! This is the data now use Export on this data and for help with the possible export file format check the docs.
Nov
29
comment Can Mathematica (or its extensions) do integration following Risch algorithm?
Really the results of Rubi 4.3 outperforms MMA 9. But loading the integrator could have been streamlined.
Nov
28
comment Modified ListPlot, how to speed it up
Have you tried with InterpolationOrder-> 0 while using the ListDensityPlot or ListContourPlot?
Nov
27
comment Problem using WhenEvent to constrain solution
Please first get rid of those nasty Subscript occurrences and do not use := to set values to simple constants use =. By the way C is reserved for something special in Mathematica, check the doc.