21,605 reputation
22559
bio website sethares.engr.wisc.edu
location Wisconsin
age 59
visits member for 2 years, 1 month
seen 19 hours ago

enter image description here

The code to generate this cartoon is in my answer to the XKCD-ification question. When executed in Mathematica, there is even a secret mouse-over message.


Aug
26
reviewed Close implement the ZOH in mathematica
Aug
25
comment How to code a simple audio equalizer?
Look at LowpassFilter, HighpassFilter and BandpassFilter. They can all be applied directly to sound objects.
Aug
25
comment Dynamically transform one Graphics to another
Well, I read the OPs comment "If I have to give up on the Drawing tools then I could at least make a simple drawing canvas. That would work" and thought an alternative approach (ie., a "simple drawing canvas") might be useful.
Aug
25
answered Dynamically transform one Graphics to another
Aug
24
comment How to apply Gaussian kernel to smooth density of points on 2D (algorithmically)
For the theory of filtering, look up "convolution" which is the mathematical operation being performed by commands like GaussianFilter. Wikipedia as always is a good reference: en.wikipedia.org/wiki/Convolution
Aug
24
comment Simplifying Products In Mathematica
You have a syntax error... use Kbox[n_,r_]:= (i.e., Set Delayed instead of Set) and it works fine.
Aug
22
comment Map of United States as a 3D histogram
Take the final image and reverse by ImageRotate[ImageReflect[image], Pi]
Aug
18
revised How to add periodicity to condition?
added 379 characters in body
Aug
18
comment Making a conjecture concerning a certain upper-triangular matrix
A.A.A gives the desired product. See the command Dot
Aug
17
answered How to add periodicity to condition?
Aug
5
comment Issues with zero frequency component in discrete Fourier transform
If you look at Fourdata, you'll see why both problems are happening. The list starts at 0, goes to 0.5, connects to -0.5 (this is the small line near zero) and then connects back to just before 0. So when you ListLinePlot, you have a connection between negative and positive values, and no connection between -small and 0.
Jul
27
comment Inconsistency of output format in `Eigenvalue`
Replace // Simplify with //N// Simplify and they look the same.
Jul
26
comment Zero-order interpolation not going fully around
Why not use ListLinePlot[dataSource]? This gives the same plot you seem to want. After all, a zero-order interpolation means connecting the points with straight lines, and this is what ListLinePLot is designed for.
Jul
25
comment Suppressing reduction in fraction box size in multi-level fractions
Use Text instead of TraditionalForm
Jul
23
comment Take the function f(x)=2x-x^2 and the open interval P=(0,2) why is f(P)=(0,1]? why is that 1 closed?
Because the function achieves the max value (of 1) at the point x=1 (in the interior of P).
Jul
21
awarded  Yearling
Jul
21
comment Convolving data set with gaussian profile
If you want to get numerical results out you'll need to define C and mu to get ker to be numeric. Then the convolution should work. You probably want the range of x to be centered near the mean.
Jul
19
reviewed Leave Open What is the order of faces on a D20? How can I optimize the order of faces on a D-n?
Jul
19
reviewed No Action Needed Two discrete colors for surface with ParametricPlot3D
Jul
19
revised multiple generators for iterative construction of fractal
added 137 characters in body