1,243 reputation
414
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location Sydney, Australia
age 48
visits member for 2 years, 4 months
seen Sep 17 at 3:13

Jul
4
awarded  Nice Answer
Jul
2
awarded  Curious
Jun
22
comment LiftingWaveletTransform with irregular grids
Thanks @eldo, but b is just a {8,8} array and, therefore, representing a signal/function in a regular grid of $(i/8,j/8)$ points, that is not irregular.
Jun
20
asked LiftingWaveletTransform with irregular grids
Jun
10
revised Calculate support of given wavelet
added 1 character in body
Jun
10
accepted Calculate support of given wavelet
Jun
10
comment Calculate support of given wavelet
Thanks a lot @Sektor. Your comment about the "impulse response" got me thinking and I was able to arrive to something similar to yours using the "PrimalHighpass" coefficients (it is most likely the same, but I will double check with yours; fantastic.)
Jun
10
comment Calculate support of given wavelet
Thanks a lot @Sektor, but the support of second graph (wavelet) seems to be around [-6,4], isn't it? This is what confuses me, because the values for $x$ where $\psi _{j,k}(x)$ is guaranteed to be zero don't seem be just outside of [0,$2^{-j}$].
Jun
10
comment Calculate support of given wavelet
I want to use DaubechiesWavelet.
Jun
10
asked Calculate support of given wavelet
May
9
awarded  Yearling
Apr
29
asked Alternative for citation management in Mathematica 9 for Mac
Mar
20
accepted How to keep labels inside the box in BarChart3D
Mar
20
revised How to keep labels inside the box in BarChart3D
edited title
Mar
20
comment How to keep labels inside the box in BarChart3D
It does! @Kuba, you should post it as answer; happy to accept it. PlotRangePadding -> .35 is just perfect :)
Mar
20
comment How to keep labels inside the box in BarChart3D
@Kuba, thanks for asking. BarChart3D rotate the labels as you change the point of view. The 3D position and overall size seem ok for very short labels as shown in first picture, but for longer labels it seems there is not enough room to display and they overflow the bottom plane. It is a little bit pedantic on my side, I am afraid, but if there is an option to change some position or size I am willing to spend some time perfecting the drawing ;-)
Feb
17
revised Fundamental Theorem of Calculus for definite integrals… assume continuity?
added 117 characters in body
Feb
17
answered Fundamental Theorem of Calculus for definite integrals… assume continuity?
Feb
16
comment Why does Mathematica evaluate Sin[2.0] but not Sin[2]?
Funnily enough, @DonComo, this N[Sin[2], 2]^2 + N[Cos[2], 2]^2 == 1 is True, although you may get a very different result in traditional programming languages. Here is what you get in Ruby (irb): ` Math.sin(2).round(2)**2 + Math.cos(2).round(2)**2 == 1` => false. The reason is that Mathematica keeps track of precision and, at the level of precision requested, the two expressions are the same :)
Feb
16
comment Measuring fractal dimension of natural objects from digital images
@VitaliyKaurov, glad you liked it. Note that Viola & Jones rightly pointed out a link between integral image and Haar wavelet basis in their paper; although this wasn't explored further. It is unclear to me the link between the paper you mentioned and fractal dimension, but certainly worth reading as I am interested in these kind of problems. Cheers.