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Aug
16
reviewed Approve Running Mathematica code from a command line
Aug
16
revised How to implement a more efficient inverse triangular recursion?
Improve the code a little
Aug
16
answered How to implement a more efficient inverse triangular recursion?
Aug
16
comment How to implement a more efficient inverse triangular recursion?
…OK, I see, but personally I think beginning from $0$ isn't very convenient here, and there's already another $u_0$ in the formula, right?
Aug
16
comment How to implement a more efficient inverse triangular recursion?
3. Why your searchSpan outputs 6 for 5/2? I think it'll be better to make it output 7, so we can implement the definition at the beginning directly. Currently, something like coelist = With[{u = knots, p = deg}, Table[{(u0 - u[[j]])/(u[[j + k]] - u[[j]]), 1 - (u0 - u[[j + 1]])/(u[[j + k + 1]] - u[[j + 1]])}, {k, 1, p}, {j, i - k, i}]] won't give the correct result.
Aug
16
comment How to implement a more efficient inverse triangular recursion?
1. Is knots always a sorted array? 2. Is the exact result necessary i.e. MachinePrecision real number can't be used?
Aug
10
accepted Smoothen the curve found by EdgeDetect
Aug
9
comment Smoothen the curve found by EdgeDetect
Seems that FindMinimum is improved (?) in v10.2, in v9 AccuracyGoal -> 10 only makes things worse, but the result without AccuracyGoal isn't bad anyway.
Aug
9
comment Smoothen the curve found by EdgeDetect
@nikie That sounds interesting, in v9 when Axes->None is set, ImagePadding->All (I think this is the default setting) and ImagePadding->None gives the same result. Maybe it's worth asking another question for this?
Aug
8
revised Smoothen the curve found by EdgeDetect
added 15 characters in body
Aug
8
asked Smoothen the curve found by EdgeDetect
Jul
30
awarded  Yearling
Jul
30
revised An recurrence equation that can be solved in version 7 but not in version 8
added 6 characters in body; edited tags
Jul
30
comment An recurrence equation that can be solved in version 7 but not in version 8
@Mr.Wizard It's already solved in v9. Well, I remember this has already been mentioned in a comment but it no longer exists, strange…BTW I think it's better to mark this as a "backslide" nowadays :)
Jul
30
revised An recurrence equation that can be solved in version 7 but not in version 8
added 26 characters in body
Jul
18
comment What will happen if I set ExclusionsStyle for points in 2D plot?
@Mr.Wizard I think this story told me that while it's important to be friendly to the new comers, it's equally important to place answers under appropriate questions :D
Jul
18
comment What will happen if I set ExclusionsStyle for points in 2D plot?
So the behavior of ExclusionsStyle is more subtle than I thought. It's worth mentioning that actually there're 8 red points on the graph.
Jul
18
comment What will happen if I set ExclusionsStyle for points in 2D plot?
@Guesswhoitis. Some more analyses added. (A little busy yesterday :) )
Jul
18
revised What will happen if I set ExclusionsStyle for points in 2D plot?
add some more analyses
Jul
17
awarded  Nice Question