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Feb
4
comment Is there a convenient way to sum TimeSeries objects in Mathematica?
TimeSeriesThread is what you want I think
Jan
17
awarded  Yearling
Jan
17
comment What is the purpose of Internal`LocalizedBlock?
@Mr.Wizard just a little tidbit, if I recall correctly this was added for the purpose of fitted models being able to work with subscripted variables so I think Dan is right on here.
Jan
16
comment Why does TimeSeriesShift is just adding a fixed number of days?
That's probably why TimeSeriesShift does what it does. Both TimeSeries and TemporalData require unique time stamps. Also many algorithms are particular About uniform vs irregular spacing which is only preserved by a uniform shift.
Jan
15
comment Why does TimeSeriesShift is just adding a fixed number of days?
What should it do for January 29th?
Jan
14
comment Periodogram for irregularly spaced data
@Verbeia you should definitely file a suggestion with WRI for Periodogram to take TemporalData (and TimeSeries). This was on my todo list before I left I just didn't get to it.
Jan
9
comment Why is my data 10 times slower than random data when doing matrix multiplication
Computing the following Tally[ByteCount /@ Flatten[tb]] shows that some of your numbers have different byte counts due to large exponents. I doubt the data can be packed.
Jan
4
awarded  Enlightened
Jan
4
awarded  Nice Answer
Jan
4
revised Rapid density estimation and rendering of decision regions
deleted 1 character in body
Jan
4
comment Rapid density estimation and rendering of decision regions
I'm glad to help.
Jan
4
answered Rapid density estimation and rendering of decision regions
Jan
1
answered Extract Specific Dates from DateList
Dec
25
comment Generate nonoverlapping random circles
Related mathematica.stackexchange.com/questions/2594/…
Dec
24
revised Double application of NIntegrate produces unexpected error messages
deleted 16 characters in body
Dec
24
answered Double application of NIntegrate produces unexpected error messages
Dec
24
comment Fitting higher order ARIMA models hangs, never completes
@TomHayden you don't want to resample but want to assume regularity then just extract the values and fit with those.
Dec
24
comment What are the differences between these functions when used for NMaximize?
I seriously doubt repeated calls to NumericQ is the problem. It is likely that without NumericQ NMaximize is able to come up with an optimized expression for your function symbolically which it caches. With NumericQ it can't optimize/evaluate the expression symbolically.
Dec
23
comment Interpretation of CopulaDistribution
The reason for my down vote is that I don't feel this addresses the question at hand and would be more fitting as a comment or in chat.
Dec
22
comment Fitting higher order ARIMA models hangs, never completes
I think this might be considered a bug then. By setting TemporalRegularity to true it should completely ignore the actual time stamps in the fitting.