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bio website paul-abbott.blogspot.com.au
location Perth, Australia
age 54
visits member for 2 years, 3 months
seen Dec 12 at 0:14

Nov
29
comment Finding the intersection of a curve with an interpolation function
Did you try increasing the number of PlotPoints or MaxRecursion options when dealing with the seismic signal? RootsInRange is not fully adaptive (you could try Ted Ersek's package instead). However, since you have the data, why not just subtract of the values of the intersecting function at the data ordinates and look for sign changes in successive data? This will be much more efficient that Interpolating a highly oscillatory function ...
Oct
8
answered Visualisation of a recursive function
Oct
6
comment Fitting ellipse to 5 given points on the plane
See also the demonstration Five Points Determine a Conic Section. An interesting related problem is that of Small Lattice Ellipses.
Sep
15
awarded  Quorum
Aug
8
awarded  Popular Question
Jun
9
asked Relative performance of the Julia language
Apr
2
comment How does Mathematica understand branchcuts of the complex logarithm?
The paper Can your computer do complex analysis? is also relevant to this discussion.
Mar
26
answered Marking points of intersection between two curves
Feb
19
answered Finding the intersection of a curve with an interpolation function
Feb
19
comment Finding the intersection of a curve with an interpolation function
The RootSearch package <library.wolfram.com/infocenter/MathSource/4482/>; by Ted Ersek returns all the roots over a specified range as a list of replacement rules This package .A RootsInRange function was presented in "Finding Roots in an Interval" in The Mathematica Journal 7(2), 1998: should be sufficient:
Nov
30
awarded  Revival
Nov
30
awarded  Editor
Nov
30
revised Upload CDF to Blogspot
Point 2 has been addressed
Nov
30
answered Upload CDF to Blogspot
Nov
6
answered Problems with Symbolic summation over unknown values
Sep
11
awarded  Yearling
Jun
26
answered When I can assume that all decimal digits returned by Mathematica are provably correct?
Jun
19
answered Daubechies scaling function
May
9
asked ShowSelection color
Dec
6
answered Levels: how do they work?