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location Melbourne, Australia
age 37
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Mining logistics analyst. Mathematica user for about 3 years.


17h
awarded  Yearling
Sep
24
awarded  Autobiographer
Jul
2
awarded  Curious
Apr
10
awarded  Popular Question
Oct
1
awarded  Yearling
Sep
23
accepted How do I calculate Standard Deviation confidence intervals in Mathematica?
Sep
23
comment How do I calculate Standard Deviation confidence intervals in Mathematica?
Nice,VarianceCI does indeed produce a asymmetrical interval. I think I was just a bit confused as to why it was different from MeanCI. It would also explain why there isn't a StandardDeviationCI, because it's a trivial extension to VarianceCI.
Sep
23
comment How do I calculate Standard Deviation confidence intervals in Mathematica?
This is similar to the approach I took the first time I looked at it. It seemed a little strange to me that the confidence interval isn't symmetrical around the standard deviation (the top band is thicker than the bottom). The other function, MeanCI/ VarianceCI produce symmetrical confidence intervals.
Sep
23
asked How do I calculate Standard Deviation confidence intervals in Mathematica?
Aug
26
comment Write C/C++ programs calling Mathematica functions
The link is clearly C->Mathematica. "The MathLink library provides a collection of C language functions for interacting with Mathematica via MathLink". The Java code was in response to the first comment.
Jul
8
accepted Mouse click on BarChart elements
Jul
8
comment Mouse click on BarChart elements
Thanks Anon. Great Answer.
Jul
8
accepted merge daily and hourly time series data
Jul
8
asked Mouse click on BarChart elements
Jul
8
comment merge daily and hourly time series data
@ cormullion Thanks. It does seem to work so I'll give you the tick. Before I do, if anybody could add some explanation that would be great (I didn't press whuber for information at the time and now I regret it). It's a fairly generic problem and it seems like a really clever solution so I think the extra discussion would help many newcomers to Mathematica with similar problems.
Jul
7
comment merge daily and hourly time series data
@rm -rf. Joining the sets and using GatherBy to arrange the data by day wasn't really the problem. It was that I had one element for the daily data and 24 for the hourly. I used a for loop to duplicate the daily data 24 times but I thought there must be a better way.
Jul
5
asked merge daily and hourly time series data
Jun
11
accepted Dynamic legends involving show
Jun
5
comment Plot and Histogram together in Mathematica 7
Replace "pdfs" in the last line with the expression (X^2+3x+..) and that should work.
Jun
4
comment Plot and Histogram together in Mathematica 7
Just change dist, like this dist = {EstimatedDistribution[data,SkewNormalDistribution[mu, sigma, alpha]]}