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bio website verbeia.com/mathematica/tips/…
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visits member for 2 years, 2 months
seen 23 hours ago

Jun
12
asked When to make (file.nb) instead of (file.cdf)?
Jun
11
answered backward compatibility
May
13
comment Does Mathematica have advanced indexing?
I like the UnitStep, ReplacePart solutions a lot. Some of the other solutions are very complicated and sure to turn off people who are new to Mathematica. .... I think I finally figured out how and when to 'Add Comment' in this forum :)
May
3
answered Constructing a function with Flat and OneIdentity attribute with the property that otimes[a]:>a
Apr
13
comment How does Interpolation really work?
I understand cubic spline interpolation has a few different varieties depending what the derivative does at the end points. I thought InterpolationOrder->3 used a cubic spline interpolation. Is a cubic spline interpolation a specific case of a B-Spline?
Apr
9
awarded  Nice Question
Apr
7
asked Are there advantages to using generalized Part extraction instead of specialized functions like First, Last?
Apr
7
answered Map and Apply a function on a nested list
Apr
6
comment Expression evaluation inside of FindRoot inside a Compiled Function
In that case you still might be able to improve performance if your compiled code includes a root-finding method built from scratch. It looks like you are doing root finding in 1D. If you know you can start with two points where the function changes sign Brent's method is a great choice. I could provide a Mma implementation of Brent's method. If you can't use Brent's method, another method such as Newton's method or secant method might work well. They are both easy to implement. You may also need to roll your own version of other function that can't be compiled.
Apr
6
answered Expression evaluation inside of FindRoot inside a Compiled Function
Apr
2
revised How to REALLY Hold arguments and capture FullForm?
I added a comment about correcting a mistake I had earlier.
Apr
1
answered How to REALLY Hold arguments and capture FullForm?
Mar
19
comment Quality of random numbers
To learn about issues with the legacy Random numbers check MathGroup. Search for "Andrzej Kozlowski Random" and I think you will see those issues explained and discussed.
Mar
15
awarded  Nice Question
Mar
8
awarded  Enthusiast
Mar
7
revised Working with large data, pass-by-reference, compiled functions
appologize for a suggestiong that is so similar to another one. The moderators are welcome to delete my post if they want.
Mar
7
answered Working with large data, pass-by-reference, compiled functions
Feb
25
answered Bold face formatting for vectors instead of overarrows like latex \mathbf{}?
Feb
22
comment Are there any cases when For[] loops are reasonable?
In my RootSearch package I call an iterative algorithm which looks for a root where there is likely to be a root. That algorithm calls a function which calls a function and so on. A few functions deep it may be discovered that the function whose roots we a looking fo is not defined at the new approximation of the root. When that happens I use Throw to give up on the iterative algorithm in that neighborhood. I don't know if you call that an exception. Also, we can use Check to take certain action when we compute 0/0 etc.
Feb
22
answered Are there any cases when For[] loops are reasonable?