Wolfram Mathematica

StringSplitAt[s_String, at:{__Integer?Positive}]:=
	StringJoin/@Internal`PartitionRagged[StringSplit[s,""],at]
StringSplitAt[s:{__String}, at:{__Integer?Positive}]:=StringSplitAt[#, at]&/@s

But, it works.

Could use an Internal`PartitionRagged equivalent of Developer`PartitionMap, though.

As the StringJoin /@ is annoying. :P

Szabolcs

@EliLansey That's one big reason I want to learn here

@acl How did you know? Did I tell you? :-)

acl

5:53 PM

@Szabolcs educated guess :)

Guillochon

6:48 PM

Hi all, didn't want to make a new posting for this because I figure it might be answered somewhere else, but I'm having clipping mask issues with figures I'm outputting to .pdf format

I have a plot that has data outside of the plot ranges I wish to show in the plot, but Mathematica generates graphics for the full dataset and then makes a clipping mask to hide the regions that are not being shown: imgur.com/VDK8l

That's a screenshot from Illustrator where I've highlighted the curves, you can see they extend greatly beyond the plot borders

It just ends up making the plot file 3x larger than it should be because its included all of that extra data

Guillochon

7:02 PM

OK; nevermind, think I answered my own question. I was using PlotRange -> Full for everything.

2 hours later…

Szabolcs

9:15 PM

Quick question: how would you create a smooth histogram for a large number of points on the surface of a sphere?

I have ~10000 points on the surface of a sphere, and I'm trying to see some pattern in their distribution. There seems to be some pattern, but it's not clear enough to see if I just plot the points.

In fact it's not even possible to see much on a static image. It becomes clear that there is a pattern though if I rotate it with the mouse.

Too late to think ... good night!

(Even after I define a function that's a smooth blob in the direction of the point, and sum that up, I need a way to project the value of that function on the surface of the sphere and show it, all with reasonable performance and preferably avoiding spherical coordinates with their next-to-pole singularities...)

Directional statistics

Directional statistics is the subdiscipline of statistics that deals with directions (unit vectors in Rn), axes (lines through the origin in Rn) or rotations in Rn. More generally, directional statistics deals with observations on compact Riemannian manifolds. The fact that 0 degrees and 360 degrees are identical angles, so that for example 180 degrees is not a sensible mean of 2 degrees and 358 degrees, provides one illustration that special statistical methods are required for the analysis of some types of data (in this case, angular data). Other examples of data that may be regarded a...

acl

@Szabolcs could you give the code to produce this?

(oh I need two votes to reach 5000!)

Sjoerd C. de Vries

9:36 PM

@JM It cost me 50 pt ;-(. And the original can still be found in the google cache BTW

R.M

@acl you're welcome

acl

@RM oh I didn't mean it that way, but thanks :)

nice, round number!

R.M

@acl meh, I was going to get to them eventually... :)

acl

so now I am a trusted user (or will be soon). what to do with my newfound power?

actually, what are my newfound powers?

hm not much it seems

R.M

@acl sorry to disappoint you, but you already got the max at 4k :)

acl

9:49 PM

wait, there's 5 of you with over 10K? now I feel lazy

R.M

@acl heh, it's been a month that way

but the numbers are very impressive, compared to any other site (and a lot of graduated ones)

Verbeia

I'm still amazed I'm #7 on the rep rankings. I know I've been spending a lot of time at the site, but it still is remarkable. (And an indication of how much I've improved as a Mathematica programmer since discovering SO/SE)

Stack Exchange

10:11 PM

Wolfram Blog: Announcing Wolfram Finance Platform

posted on May 15, 2012 by Jon McLoone

One key project for me recently has been the new Wolfram Finance Platform, which I am pleased to announce today. This is a major new initiative for us to create the ultimate computation environment for finance. It builds on our existing computational technology with extra capabilities and professional support services. As part of this, I [...]