43,911 reputation
165177
bio website uoregon.edu/~noeckel
location
age
visits member for 2 years, 7 months
seen 1 hour ago

2h
answered export MatrixPlot[] graphics to PDF
6h
reviewed Close Dual core CPU — Mathematica uses only 29% of one core
6h
reviewed Close Power::infy: error using FindFit
6h
reviewed Close What is the meaning of a result of {{}}?
17h
comment Transformation of Derivatives under change of coordinates
Closely related: How to change coordinates of a differential operator? The main thing is to apply the chain rule. This question is simpler than the linked one because the transformation is linear.
1d
reviewed Close if f(x) is O(g(n)), then does it follows that h(f(x)) is in O(h(g(x))?
1d
comment Selectively updating individual graphics in a dynamic, multiple-plot Show
@RonaldMonson In your updated post, the statement that Show expects Graphics is not correct. Besides Graphics3D, it also accepts Legended@Graphics and Legended@Graphics3D. My point is the Plot can produce the Legended output, too, and I automatically account for that.
1d
reviewed Leave Closed Plotting an function defined by an integral
1d
reviewed Leave Closed Visualizing The Crack of The RSA Cryptosystem
1d
comment Selectively updating individual graphics in a dynamic, multiple-plot Show
My advice is that if you can get by without taking apart the output of built-in functions such as Plot, then that's less likely to break in future versions. The introduction of PlotLegends illustrates this. It creates Plot output with Head Legended instead of Graphics. In earlier versions, that didn't happen, so that code relying on the internal structure of Plot output from the old version will not work. My solution doesn't rely on any undocumented internal structures.
1d
comment Customizing display of partial differential equations
@Mr.Wizard Are you saying that there is anything wrong with Format in the context of this question? Note that the question is only about formatting for TraditionalForm.
1d
reviewed Close Counting the zeros in a factorial expansion
1d
comment Counting the zeros in a factorial expansion
You only need to apply DigitCount to the factorial.
1d
reviewed Close Citation of the algorithms used in FindGraphCommunities
1d
comment Selectively updating individual graphics in a dynamic, multiple-plot Show
This won't work if you add PlotLegends to one or both of the plots (e.g.).
2d
comment Selectively updating individual graphics in a dynamic, multiple-plot Show
There were indeed errors as @Pickett observed, due to the argument of the Locator containing a constant and not a variable. I posted a version that fixes this and also addresses the Show issue.
2d
answered Selectively updating individual graphics in a dynamic, multiple-plot Show
2d
comment How to apply Gaussian kernel to smooth density of points on 2D (algorithmically)
I show a more low-level implementation in this answer, so you may want to read that and look up GaussianFilter
2d
answered Customizing display of partial differential equations
2d
comment Customizing display of partial differential equations
I can't resist pointing out that suppress is written with two p...