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Aug
25
revised How to simplify the equation and speed up the codes for four 100*100 matrices
edited title
Aug
21
reviewed Close Manipulate After upgrading to windows 10
Aug
12
reviewed Close Transforming the x-axis of a figure created with customticks package
Aug
11
comment Fitting one set of data with two function
You could try Piecewise.
Aug
11
revised Fitting one set of data with two function
added 40 characters in body
Aug
9
comment Calculate the limit of an integral
Also, Series[int/Log[1+x], {x,0,1}] gives -1.
Aug
9
revised I created the following code, the code execute too slow, it does not show the full out put of the stream function, how I should optimize the code?
deleted 630 characters in body
Aug
7
revised Solving SDE: $\frac{dy(t)}{dt}=(c+\sigma_wW(t))y(t)+\epsilon(t) $ in Mathematica
added 1 character in body
Aug
5
comment ListContourPlot3D drops data
This is not so difficult ListPlot3D[#[[All, 2 ;;]] & /@ GatherBy[data, #[[1]] &], PlotTheme -> "Detailed"].
Aug
4
comment Simple minimization not evaluating
If your expression is non polynomial I don't think Minimize will handle it.
Aug
4
comment How to get a difference of two contour integrals depending on integer parameter?
If you do FullSimplify[h[x, 10, e] - g[x, 10, e], Assumptions -> {0 < e < 1, Re[x] > 0}] and then take the limit it seems to return what you expect.
Aug
4
comment Simple minimization not evaluating
Have a look at NMinimize.
Aug
4
comment Turning an expression into a function inside another function
Can't you define calcDerAtq[func_, q_] := Derivative[1][func][q] and use it as calcDerAtq[Sin[#] Log[#^2/2] &, 10] ?
Aug
4
revised Turning an expression into a function inside another function
deleted 1 character in body
Aug
2
comment Why can not the vector be transposed in integrating over a region?
For 1D lists you don't actually need to transpose but most importantly you don't want to use curly braces. Just (x.A.x)/2 will work.
Jul
30
comment Is this behaviour, producing OutputSizeLimit`Dump`encapsulateOutput, a bug?
Same with 10.2 Win7 x64.
Jul
26
comment Two warning messages in NIntegrate and NDSolve
One step at a time: the second derivative is z''[\[Rho]] or Derivative[2][z][\[Rho]] (which you know already); do not use primes.
Jul
20
awarded  Enlightened
Jul
20
awarded  Nice Answer
Jul
17
awarded  Enlightened