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Jul
16
revised Fitting the Plot by fourier Series of either sine or cosine
added 51 characters in body
Jul
16
answered Fitting the Plot by fourier Series of either sine or cosine
Jul
16
comment Why is there a huge performance gap using Map with more than 100 List entries
Can you show what d is? and isn't this the same : Map[d[[Sequence @@ #]] &, cube]? I cant reproduce this slowness even on much larger lists.
Jul
16
revised Findfit doesn't give the good fit; Changing the starting values will not change the results
edited body
Jul
16
answered how to write string to file without Quotation mark
Jul
15
revised Findfit doesn't give the good fit; Changing the starting values will not change the results
deleted 65 characters in body
Jul
15
revised Logarithmic curve fit in data
added 77 characters in body
Jul
15
answered Logarithmic curve fit in data
Jul
15
revised Findfit doesn't give the good fit; Changing the starting values will not change the results
added 958 characters in body
Jul
15
comment How to get a uniformly distributed list of points from a B-spline function
some of this may be useful mathematica.stackexchange.com/questions/50581/…
Jul
14
revised Findfit doesn't give the good fit; Changing the starting values will not change the results
added 461 characters in body
Jul
14
answered Findfit doesn't give the good fit; Changing the starting values will not change the results
Jul
14
answered Reduction of repetitive calculations in Table
Jul
14
comment Simple differential equation to solve
note you have the same issue with D[x[Te, w], Plocal]. x[Te,w] has no apparent dependency on Plocal so this is zero, hence your equation as written is just ` 1 + 0 == 0 ` which just evaluates to False
Jul
14
comment Simple differential equation to solve
Te is an undefined symbol, so that D[Te, Plocal] immediately evaluates to zero (ie before Solve starts to work on it). You need to tell mathematica Te depends on Plocal, ie. use D[Te[Plocal], Plocal], or likely better dont use D function at all and use a symbol such as dTedPlocal both in the equation and in Solve
Jul
14
comment Distance between data and curve
just fyi a high order polynomial is usually a terrible way to approximate data. You will tend to hit the points well and deviate wildly in between.
Jul
12
comment How to make Mathematica save all open files, or automatically ask to save each file when closing
does this change the modification time on every notebook you open even if unchanged?
Jul
12
revised NIntegrate Trapezoid rule with even subdivision producing poor results
deleted 1 character in body
Jul
12
revised NIntegrate Trapezoid rule with even subdivision producing poor results
added 7 characters in body
Jul
12
comment NIntegrate Trapezoid rule with even subdivision producing poor results
really nice piece of work, but it doesn't relate to the issue at all since the BUG doesn't appear with maxrecursion->0. If you do points->2 recursion->1 you get a completely different result than points-3 recursion->0 based on the exact same sample points.