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interesting mathematica questions on StackOverflow

• To: mathgroup at smc.vnet.net
• Subject: [mg109231] interesting mathematica questions on StackOverflow
• From: dreeves <dreeves at gmail.com>
• Date: Sun, 18 Apr 2010 05:58:09 -0400 (EDT)

Another resource for Mathematica questions is
http://stackoverflow.com/questions/tagged/mathematica

The answers (and the questions) tend to be very high quality. Here's a
sampling:

posmax: like argmax but gives the position(s) of the element x for
which f[x] is maximal:
http://stackoverflow.com/questions/2656769/posmax-like-argmax-but-gives-the=
-pos

parsing and generating JSON:
http://stackoverflow.com/questions/2633003/parsing-and-generating-json

regular expressions on unicode strings:
http://stackoverflow.com/questions/2512766/mathematica-regular-expressions-=
on-uni

check if OpenSQLConnection was successful:
http://stackoverflow.com/questions/2511463/how-can-i-check-if-opensqlconnec=
tion

extract a Date from an SQLDateTime object:
http://stackoverflow.com/questions/2471250/how-to-extract-a-date-from-an-sq=
ldateti

import a file into mathematica and reference a column by header name:
http://stackoverflow.com/questions/2422584/how-to-import-a-file-into-mathem=
atica

deal with large data files:
http://stackoverflow.com/questions/2370570/way-to-deal-with-large-data-file=
s

creating lists and vectors of specific length:
http://stackoverflow.com/questions/2348772/mathematica-creating-lists-and-v=
ect

does Mathematica 7 support lazy evalution:
http://stackoverflow.com/questions/2233133/does-mathematica-7-support-lazy-=
ev

a function equivalent to Matlab=92s =93unique=94 function:
http://stackoverflow.com/questions/2203737/does-mathematica-have-a-function=
-eq

Web UI for inputting a function from the reals to the reals, such as a
probability distribution:
http://stackoverflow.com/questions/2181120/web-ui-for-inputting-a-function-=
from

introspection of messages generated in Mathematica:
http://stackoverflow.com/questions/2007160/introspection-of-messages-genera=
ted

cryptographic hash (sha1 or md5) of data given as a string:
http://stackoverflow.com/questions/1854491/cryptographic-hash-sha1-or-md5-o=
f

HMAC (hash-based message authentication code, aka data signing):
http://stackoverflow.com/questions/1851436/hmac-hash-based-message-auth

export custom formatted expressions from Mathematica:
http://stackoverflow.com/questions/1687705/export-custom-formatted-expressi=
ons

multiple assignment between lists:
http://stackoverflow.com/questions/1653707/multiple-assignment-between-list=
s

function foo that can distinguish foo[.2] from foo[.20]:
http://stackoverflow.com/questions/1628194/mathematica-function-foo-that-ca=
n

Unevaluated vs Defer vs Hold vs HoldForm vs HoldAllComplete vs etc
etc:
http://stackoverflow.com/questions/1616592/mathematica-unevaluated-vs-defer=
-vs

Mathematica in batch mode from the command line on Mac OS X:
http://stackoverflow.com/questions/1604680/mathematica-in-batch-mode-from

suppressing a trailing =93.=94 in numerical output from Mathematica:
http://stackoverflow.com/questions/1545986/suppressing-a-trailing-in-numeri=
cal

sprintf equivalent in Mathematica:
http://stackoverflow.com/questions/1526617/sprintf-equivalent-in-mathematic=
a

struct data type in Mathematica:
http://stackoverflow.com/questions/1453006/struct-data-type-in-mathematica

equivalent of =93defined=94 in Mathematica:
http://stackoverflow.com/questions/1446477/equivalent-of-defined

get the name of a calling function within a module:
http://stackoverflow.com/questions/1415104/how-can-i-get-the-name-of-a-call=
ing

HashTable structure:
http://stackoverflow.com/questions/1392007/is-there-hashtable-structure

semantics of Mathematica=92s Thread function:
http://stackoverflow.com/questions/1250125/the-semantics-of-mathematicas-th

prepend a column to a matrix:
http://stackoverflow.com/questions/1244782/how-to-prepend-a-column-to-a-mat

what does @@@ mean:
http://stackoverflow.com/questions/1141166/in-mathematica-what-does-mean

images have a fubar color palette when generated under Xvfb instead of
normal X:
http://stackoverflow.com/questions/953065/images-have-a-fubar-color-palette

setting environment variables:
http://stackoverflow.com/questions/852056/setting-environment-variables

exporting a plot as an image on a machine without X11 (ie, without
involving the frontend):
http://stackoverflow.com/questions/315464/exporting-a-plot-as-an-image

ForEach loop in mathematica:
http://stackoverflow.com/questions/160216/foreach-loop-in-mathematica

call a Mathematica program from the command line, with command-line
args, stdin, stdout, and stderr:
http://stackoverflow.com/questions/148057/call-a-mathematica-program-from-t=
he-com

best open-source Mathematica equivalent:
http://stackoverflow.com/questions/33550/best-open-source-mathematica-equiv=
alent


Finally, here's an RSS feed of new mathematica questions on
stackoverflow:
 http://stackoverflow.com/feeds/tag?tagnames=mathematica