Szabolcs

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	34,313 reputation	bio	website		visits	member for	1 year, 4 months
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2h	comment	How can I conveniently call igraph through RLink? Thanks to Leonid for showing me how to use an external R installation on Mac!
14h	comment	Why is StringExpression faster than RegularExpression? I tried `time pcregrep --buffer-size=100000000 '(?ms)(?:(?ms)\(ICD-9-CM (.+?)\))' test.txt >/dev/null` with pcregrep 8.32. This doesn't replace, it only matches, so it may not be correct. It takes 0.09 s here.
14h	comment	Why is StringExpression faster than RegularExpression? Do you know what the `?:` means? (I don't.) Maybe this is something worth mentioning to support then?
14h	comment	Why is StringExpression faster than RegularExpression? The answer might be in StringPattern`PatternConvert[re]... which is not the same as `re`.
14h	comment	Why is StringExpression faster than RegularExpression? I think you have v7. Just mentioning that it's the same in 9 too.
1d	comment	Optimizing functions taking matrix arguments `Return` is not needed here and you can also drop the `;`. This is not just nitpicking: while in this particular example it does not make a difference if you use it or not, when used inside some functions, it will return from those functions and not from your function.
1d	comment	*Telling mathematica to output instead of space for multiplication, so I can copy as plain text** For MATLAB, use what rm said. For C, use `CForm`.
2d	comment	At what point should MLSetMessageHandler() be called? @ToddGayley I noticed now that the output of mprep has `MLMDEFN( void, MLDefaultHandler, ( MLINK mlp, int message, int n))` if `MLINTERFACE >= 3`, which seems to be the default for Mathematica 9. It has `unsigned long` otherwise.
2d	comment	At what point should MLSetMessageHandler() be called? @ToddGayley I was not aware that I need to send `Abort[]` explicitly when the return type is `Manual`, thanks for pointing that out!
2d	comment	At what point should MLSetMessageHandler() be called? @ToddGayley I got the `msghandler` prototype from this documentation page. It uses `int` types. I checked `mathlink.h` as well, and if I followed the definitions back correctly (it's easy to make a mistake with all the `#ifdef`s) then `MessageHandlerObject` is a `MLHandlerUPP` which is a `MLHandlerProcPtr` which is defined as `MLMPROC( void, MLHandlerProcPtr, (MLINK mlp, int m, int n));`. Are you sure that the arguments should be `unsigned long`?
May 20	comment	At what point should MLSetMessageHandler() be called? What I ended up with eventually was defining a function callable from Mathematica that set up the handler. I think I could also move calling this function into the template file.
May 20	comment	At what point should MLSetMessageHandler() be called? @ToddGayley and Leonid: Thanks! Otherwise does the handler look fine, calling `stdhandler` for everything except Interrupt and Abort? It was not clear to me which messages must be handled, and how.
May 20	awarded	export
May 20	awarded	Nice Question
May 19	comment	I want to draw a graph using a weighted Adjacency matrix How do you want the weights to modify the drawing of the graph?
May 19	revised	CUDAQ[] returns False in version 9 while True in version 8 edited title
May 19	answered	CUDAQ[] returns False in version 9 while True in version 8
May 19	answered	How to set image DPI?
May 19	comment	Can one identify the design patterns of Mathematica? @OleksandrR. That's true, it can be used in any language.
May 19	comment	CUDAQ[] returns False in version 9 while True in version 8 This has happened to me. Try this in v9: `CUDAResourcesUninstall[]; CUDAResourcesInstall[]`. The download will take some time.