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visits member for 1 year, 8 months
seen Jul 27 at 14:11

Dec
3
comment How to solve this FindFit::nrlnum:
Interesting, your method works in MM9 while not work in MM8. And I really don't understand that the data points are so trivial, why I have to add so many options to make the fit work?
Dec
3
asked How to solve this FindFit::nrlnum:
Dec
1
comment How to parallel the computation tasks according to machines instead of kernels
@ssch Thank you ssch! You enlightened me, though your comment is not 100% right. Try ParallelTable[Eigenvalues[Randomreal[{1,2},{6000,6000}],{1}], this won't automatic multi-thread. But I figured out just now that ParallelTable[SetSystemOptions["MKLThreads" -> 8];Eigenvalues[Randomreal[{1,2},{6000,6000}],{1}]will use 8 cores. So problem solved. When we want to use multi-thread feature, we have to "parallel" SetSystemOptions["MKLThreads" -> 8] to each kernels.
Dec
1
awarded  Promoter
Nov
29
comment How to parallel the computation tasks according to machines instead of kernels
@tchronis well, the most time consuming part is eigenvalues computation, it can't be compiled. Eigenvalues is already a built-in numeric function, it should not be much slower than C or fortran
Nov
29
revised How to parallel the computation tasks according to machines instead of kernels
added 56 characters in body
Nov
29
asked How to parallel the computation tasks according to machines instead of kernels
Nov
25
accepted How to Clear variables represented as a list of strings?
Nov
25
comment How to Clear variables represented as a list of strings?
@YvesKlett I don't know how to write a proper title. Could you help to edit my title? Thank you
Nov
25
comment How to Clear variables represented as a list of strings?
@Kuba I like your quick and accurate answer!
Nov
25
asked How to Clear variables represented as a list of strings?
Nov
25
accepted How to construct this matrix fast?
Nov
25
accepted How to force an evaluation to use only one core?
Nov
25
accepted How to partition a list according to a nested table structure?
Nov
23
accepted Why does Thread FileDate give an error message?
Nov
22
revised What is the principle behind Dispatch?
added 79 characters in body
Nov
22
comment What is the principle behind Dispatch?
@Mr.Wizard Yeah, I admit it is a little off-topic. And I was wondering if DeleteCases also use hash table? Because it is fast too.
Nov
22
asked What is the principle behind Dispatch?
Nov
22
awarded  Yearling
Nov
21
comment How to Delete Elements from List1 appearing in List2?
@LeonidShifrin and I found that though Complement sort result, but it's even faster then DeleteCases when I test large list!