1,101 reputation
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location Denmark
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visits member for 11 months
seen 2 days ago

2d
comment Why does a certain CSV file import properly into LibreOffice but not into Mathematica 10.0?
Did you try Import["file_exported_from_LibreOffice.csv"]
Aug
29
comment Menu item “Interrupt Evaluation…” missing in V10
alt + , still works on v10 win 7
Aug
22
accepted How to tell NDSolve about known relations of the exact solution
Aug
21
comment How to tell NDSolve about known relations of the exact solution
I don't understand how that is useful. When the order of the equation system is reduced to 3, how would I know what the sign of the Sqrt is? It's needed for both y'[t] and x''[t], so only x'[t]and k[t] is available to determine it, which I believe is impossible?!
Aug
21
revised How to tell NDSolve about known relations of the exact solution
edited title
Aug
21
asked How to tell NDSolve about known relations of the exact solution
Aug
9
asked Problem with grid alignment
Aug
1
answered how to extract a matrix and a vector from a vector
Jul
29
revised Need an efficient way to do this list manipulation
added 121 characters in body
Jul
29
revised Need an efficient way to do this list manipulation
added 27 characters in body
Jul
29
revised Need an efficient way to do this list manipulation
added 129 characters in body
Jul
29
answered Need an efficient way to do this list manipulation
Jul
29
answered How do I solve for one variable in terms of other variables in Mathematica?
Jul
28
comment Using select to pick out elements of nested lists in an odd way
This does it: Cases[{{{A, B}, {A, D}}, {{C, D}, {A, A}, {H, A}}, {{A, H}}}, {___, {A, _}, ___, {A, _}, ___}]
Jul
28
accepted Which function definition is used to evaluate an expression that matches the lefthand side of more than one definition?
Jul
27
asked Which function definition is used to evaluate an expression that matches the lefthand side of more than one definition?
Jul
6
comment How to avoid plotting lines not defined in a Which function?
Use option: Exclusions -> None
Jul
2
awarded  Curious
Jun
11
comment Determine Functions Given Data Points
The constant function f[x,y]=0 contains those solution, and is found by mathematica using InterpolatingPolynomial: InterpolatingPolynomial[{{{0, 0.5}, 0}, {{1, 0.5}, 0}, {{0.6, 0.8}, 0}, {{0.4, 0.2}, 0}}, {x, y}]
May
10
accepted Checkbox behaving weird when variables are local