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Jul
29
revised BSplineFunction derivatives wrong if using weights?
added 2 characters in body
Jul
29
revised BSplineFunction derivatives wrong if using weights?
added 29 characters in body
Jul
29
answered BSplineFunction derivatives wrong if using weights?
Jul
29
comment GUI->Text code conversion
mathematica.stackexchange.com/questions/2202/…
Jul
29
comment Overwriting first line of large file
... you might start by loading up the first line with blanks, then when you want to add , rewrite the line keping the length fixed. off hand i'm not certain mma can do that but its worth a try.
Jul
29
comment Overwriting first line of large file
there is no way around rewriting the file. this is not a mathematia isue but a result of the way the os stores the file. id imagine some shell tools will do this faster than mathematica though
Jul
28
answered Zero-order interpolation not going fully around
Jul
28
comment Zero-order interpolation not going fully around
good catch noting the inconsistency in the ListLinePlot and ListInterpolation implementations. Of course both strictly follow what the docs say: "yields a collection of flat regions, with steps at each data point "
Jul
27
comment Zero-order interpolation not going fully around
doesn't extending the plot range to eg 1.001 close it? I'm still at a loss as to why you dont just use the first order interpolation.
Jul
26
comment NSolve for large models
try working with findroot. your question needs a better title by the way (what does Solve have to do with anything?)
Jul
26
comment Zero-order interpolation not going fully around
sorry i cant actually run things here. my thought is the interpolation function is correct and you are seeing an artifact of the way plot handles discontinuous functions
Jul
26
comment Zero-order interpolation not going fully around
on furthe thought i suspect if you Plot[ftdata[t][[1]],{t,0,1}] this will begin to make sense.
Jul
26
comment Zero-order interpolation not going fully around
i dont understand why you get a plot at all. a zero order interpolation of 2d data it seems should give you discrete points (?). what do you get if you plot beyond the range 0-1?
Jul
23
comment Multiply value if it includes a period
@Phily ImportString is still a good approach vs doing your own parsing.
Jul
21
comment Progress Indicator & sums
that is just plotting all the points. It gets a bit hairy if you want to show only the points in the current recursion.
Jul
21
revised Progress Indicator & sums
added 83 characters in body
Jul
21
answered Progress Indicator & sums
Jul
21
comment Progress Indicator & sums
..you can make this work nice, forgoing the adaptive evaluation, by using MaxRecursion -> 0, PlotPoints -> 200
Jul
21
comment Progress Indicator & sums
Plot adaptively evaluates x in a non sequential order. Without knowing a priori how many evaluations will be needed I see no sensible way to make the progress indicator work
Jul
21
comment Construct a function that can generate a geometry by extruding a section
I agree this is not a duplicate since he seems to want an analytic representation of the solid. Unfortunately I think the answer is simply 'no there is not a straightforward general approach'