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Jan
28
comment The basic primitive recursive functions
Could you expand the question a bit? Specifically, state how the included example fails to answer the question, and how the question is different from the one you linked.
Jan
27
comment Is there a simple way to get the Conjugate of a complex term, provided all information is available?
FullSimplify[Conjugate[t22] t22, energy > 2] works okay
Jan
26
comment What is the fundamental difference between “PlotPoints” and “MaxRecursion”?
FYI the documentation for Plot states it fairly clearly - "Plot initially evaluates f at a number of equally spaced sample points specified by PlotPoints. Then it uses an adaptive algorithm to choose additional sample points, subdividing a given interval at most MaxRecursion times. "
Jan
25
comment Erroneous color function for ContourPlot when the function has a small positive region and the PlotRange is specified manually
The problem can be reproduced using e.g. 0.05 - 0.005 (x^2 + y^2) as the function to be plotted.
Jan
25
awarded  Nice Answer
Jan
23
answered Positions of elements in the initial flattened list in a split list
Jan
22
comment Subset-type function construction
Yes please leave it open for a day or so, this sort of question is usually very popular and it will be good to see alternative approaches.
Jan
22
comment Subset-type function construction
FYI in your original code Flatten[{#[[1]] -> #[[2]]} & /@ Transpose@{c, a}] can be written more succinctly as Thread[a -> c]
Jan
22
comment Subset-type function construction
Looks like we had similar ideas for a fix :-)
Jan
22
revised Subset-type function construction
added 307 characters in body
Jan
22
answered Subset-type function construction
Jan
22
comment Finding mean brightness, standard deviation, count of pixels in gray scale images
All good points of course.
Jan
22
awarded  Great Answer
Jan
22
comment Finding mean brightness, standard deviation, count of pixels in gray scale images
The slowest part is probably importing the images. For the single image case the OS will cache the file in memory so repeated timings will be faster.
Jan
18
comment ReplaceAll behavior change from 10.2 to 10.3
See this for some more on RuleCondition
Jan
18
comment ReplaceAll behavior change from 10.2 to 10.3
Looks like a bug to me. Other workarounds would be forcing evaluation at replacement time using RuleCondition[a + b] as the RHS of the rule, or afterwards using eg Map[Identity, replace[l1], -1]
Jan
18
awarded  Nice Answer
Jan
16
comment Plot contour lines on a sphere
@MichaelE2, thanks, I hadn't spotted that.
Jan
16
revised Plot contour lines on a sphere
added 8 characters in body
Jan
16
answered Plot contour lines on a sphere