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1d
revised How to generate two group of $n$ random numbers in $U(0,1)$ such that sum of these two groups equal?
added 375 characters in body
1d
answered How to generate two group of $n$ random numbers in $U(0,1)$ such that sum of these two groups equal?
1d
revised Symbolic vs numerical integration
added 145 characters in body
2d
revised Symbolic vs numerical integration
added 35 characters in body
2d
answered Symbolic vs numerical integration
2d
comment Symbolic vs numerical integration
Thats my point. delta is zero over your entire domain. Your analytic result is going to be difficult if not impossible to evaluate numerically with any accuracy due to working precision issues.
2d
comment Symbolic vs numerical integration
Since s<0 the quantity (w-s) is strictly positive on [0,Inf] , so I'm not following your delta approximation result. In any case I do not believe Integrate does any such approximation.
2d
comment Follow each pixel brightness in set of images (Memory constrained)
My experience has been it is actually faster to import a whole image and extract the required part ( Import[file,"Data"][[row,col]] ) than to use Import's subelement feature..
2d
comment File filter in SystemDialogInput
works for me v10.1 on win and linux.
Feb
4
comment Follow each pixel brightness in set of images (Memory constrained)
I think you'll find Import[] swamps the time of everything else. If you want to load the data just do something like this: Transpose[ImageData@Import[#] & /@ fNames, {3, 2, 1}]
Feb
4
comment what's my air speed if i know these details
this is not a mathematica question
Jan
25
revised Weighted arithmetic mean
added 46 characters in body
Jan
25
comment What is wrong with my user-defined ordering function?
I think you hit the nail on the head, but with too complicated an example. Simply using myOrderingFunction[a_, b_] := a < b shows the same thing. Properly an ordering function must return True for the equality case.
Jan
25
comment ReadList ignore comment lines?
The fastest thing likely is to use sed or grep. You can likely do that inline with something like Import["!sed .... file" , ..].
Jan
25
comment What is wrong with my user-defined ordering function?
I guess you need to show your function so folks can reproduce the problem.
Jan
25
comment ReadList ignore comment lines?
I believe the answers over there address that.
Jan
25
comment Issues with PlotRange!
Can reproduce the blank plot with PlotRange -> {0, 10.^306} ( just a bit smaller than $MaxMachineNumber.) Useless as that is anyway you'd still expect an error message.
Jan
25
comment Issues with PlotRange!
confirmed with 10.1. Weird, no plot at all, no axes or anything. I will say those options don't really make sense for a singular function, but in other cases you do get a plot at least.
Jan
25
comment ReadList ignore comment lines?
possible dup : mathematica.stackexchange.com/q/50718/2079
Jan
15
answered How can I encrypt/decrypt a directory?