David Carraher

7,316 reputation

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	7,316 reputation	bio	website		visits	member for	1 year, 5 months
1942 badges		location			seen	6 hours ago

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Jun 15	comment	How can I revise my program to avoid “No more memory available”? All the solutions consist of a list beginning with 1, followed by permutations of Range[2,2n], such that the odd elements of the full lis increase monotonically. This suggests an approach of producing the odd elements first (always beginning with 1), and then Riffle-ing with all permutations of the remaining elements, which are the Complement[Range[2, 2n], odd elements] . I have to run so someone else can implement this if they wish.
Jun 5	comment	Why does MemberQ need {} around the expression? I believe that `MatchQ[RealDigits[344444][[1]], {x___, 3, 4, y___}]` is what you want.
Jun 4	comment	Most efficient way to sum over matrix products? @Rod Lm Correct. I was just having a little fun.
Jun 4	comment	Most efficient way to sum over matrix products? @Rod Lm The sum is zero even if the matrix is really, really large? ;}
Jun 4	comment	Introduction of straight Line into Manipulate function @Milan I suspect there is an earlier definition of one of your variables that is causing the problem. `ClearAll` your variables before running the code. (No, I don't get that mistake.) I do get a continuous running of the code however. Perhaps someone can suggest how to clear up that problem.
Jun 4	answered	Introduction of straight Line into Manipulate function
Jun 4	comment	Introduction of straight Line into Manipulate function Is the line vertical? Is it controlled via the mouse or by a controller? What is its purpose?
Jun 3	comment	Importing strings in Mathematica Anything strange when you try `data1//FullForm` ?
May 30	comment	Programatically adding/retaining comments within a nested list +1 `y : ("(" ~~ ___ ~~ ")")` is nice.
May 28	answered	Is there any function that creates an array from 1 to n, repeating each value m times?
May 23	revised	Counting multiplications (complexity function) added 114 characters in body
May 23	revised	Counting multiplications (complexity function) t placed at beginning
May 23	revised	Counting multiplications (complexity function) t placed at beginning
May 23	answered	Counting multiplications (complexity function)
May 22	comment	Are there any functions that can determine the disorder between two lists? `SpearmanRankTest`, which assumes ordinal rather than interval data, returns the same result as the Pearson test.
May 22	comment	Are there any functions that can determine the disorder between two lists? @FredKline. Actually, `Correlation` doesn't do just what I was looking for. I switched to `PearsonCorrelationTest`.
May 22	revised	Are there any functions that can determine the disorder between two lists? pic2
May 22	revised	Are there any functions that can determine the disorder between two lists? pic2
May 22	answered	Are there any functions that can determine the disorder between two lists?
May 21	comment	Behaviour of prediction bands The magnitude of the noise depends of the value of the function. (As I understand it, your noise is heteroscedastic.). Note that the noise for larger values is proportionately greater than for smaller values. Sure you want to add noise in this way? Or do you want noise that's independent of the value?