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visits member for 2 years, 1 month
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Feel free to correct the grammar mistakes in my posts.


Jul
17
revised How to estimate the matrix condition number in the 2-Norm?
added 87 characters in body
Jul
17
awarded  Investor
Jul
15
comment How can I speed up this code?
@user14634 This is exactly what Simon proves in the last 4 steps of his explanation. By the way, the justification can be even easier with tensor notation.
Jul
15
answered How can I speed up this code?
Jul
15
awarded  Revival
Jul
15
accepted Strange behavior of BinCounts
Jul
15
revised Strange behavior of BinCounts
add the tag "bugs"
Jul
15
answered Strange behavior of BinCounts
Jul
14
reviewed Approve suggested edit on Help to plot Poincare section for a system of delay differential equations
Jul
5
reviewed Reject suggested edit on Deleting all characters in a string that do not belong to a small set of elements
Jul
4
comment How can I solve my system of differential equations?
@raj As I mentioned in the comment above, the best choice here is to use ParametricNDSolveValue in v9, NDSolve approach should also be available, but I can't figure out where the shoe pinched without your specific code.
Jul
3
comment CompilationTarget->“C” crashes the kernel
Same problem with TDM-GCC-4.8.1, Mathematica 8.0.4, Vista 32bit. Well, in fact it's not the first time I found CompilationTarget -> "C" made trouble, but I haven't yet managed to reproduce this kind of problem with a simple enough example for so long.
Jul
3
reviewed Reject suggested edit on How to linearize an expression automatically?
Jul
2
awarded  Curious
Jun
25
comment how to solve second order nonlinear coupled differential equations using NDSolve with hyperbolic function
@ameera "StartingInitialConditions" is just a guess, here I just choose it casually. For your equations there're many available "StartingInitialConditions", for example {x[0] == -1, x'[0] == -1, y[0] == 0, y'[0] == 0}, but it's also worth to mention that it can be really hard to choose proper initial conditions for some equations, for example this one.
Jun
18
reviewed Approve suggested edit on Displaying the roots of a complex function using ListCurvePathPlot
Jun
18
answered how to solve second order nonlinear coupled differential equations using NDSolve with hyperbolic function
Jun
18
answered RK4 Gravity Simulator
Jun
18
comment Smooth Peter de Jong attractor
I think it'll be better if you add the compiled code since the existed piece of code can't be compiled directly. Compile isn't easy for everyone :)
Jun
17
accepted Can a Symbol own OwnValues that don't evaluate when it's the head of an expression?