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Apr 13 |
comment |
Fourier series spectrum argument and absolute value Well it seems to me that you can get a Fourier series using FourierSeries[110 Sin[120 Pi t] + 50 Cos[360 Pi t + Pi/3], t, 400, FourierParameters -> {1, -Pi}] (you can change the parameters as desired). |
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Apr 13 |
comment |
Is there a built in function to obtain the back diagonal of a matrix? @Mr.Wizard I was not aware that you were an advocate of "transparency" :) thanks. |
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Apr 13 |
comment |
Fourier series spectrum argument and absolute value maybe FourierTransform will be useful. Be sure to look at the "Details and Options" bit in the docs to see how to fix the constants you want. |
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Apr 13 |
answered | Is there a built in function to obtain the back diagonal of a matrix? |
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Apr 13 |
comment |
ItoProcess for stochastic reaction-diffusion equation discretize spatially, this solving a set of coupled SDEs in time. like the method of lines for PDEs. |
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Apr 12 |
comment |
ItoProcess for stochastic reaction-diffusion equation it can be done, for example, by discretising spatially. |
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Apr 11 |
comment |
Exporting large expression If DumpSave does not work for you (eg because it is OS-and version-dependent), perhaps you could try exporting as a string. |
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Apr 10 |
comment |
What ways are there to convert an Integer to a list of digits? reference.wolfram.com/mathematica/ref/IntegerDigits.html |
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Apr 4 |
comment |
Is it possible to lower the bitwidth of (floating point) numbers? According to the docs, "Supported types are Integer, Real, and Complex. " so I'd go for "no". |
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Apr 3 |
comment |
Speeding up numerical computations Compile your code. |
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Apr 3 |
comment |
How to capture Print output So you want something like $PrePrint or $Post which would also capture the output of Plot[Sin[x],{x,-5,5}];? |
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Apr 2 |
revised |
Density plot for data with a wide dynamic range edited title |
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Apr 2 |
comment |
Density plot for data with a wide dynamic range "large data"--I think it may be better to say "wide dynamic range" or something like that; what do you think? |
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Apr 2 |
answered | Density plot for data with a wide dynamic range |
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Apr 2 |
comment |
Minimization problem using FindMinimum. Functional value “is not a real number”? @whuber yes, obviously the code is irrelevant and the message self-explanatory. This is why minimal examples are usually best... |
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Apr 1 |
comment |
How to add lists with unequal length? for two lists, fadd[a_, b_] := (PadRight[a, Length@b] + b) /; Length[b] > Length[a];
fadd[a_, b_] := (PadRight[b, Length@a] + a) /; Length[a] > Length[b] should work. This can be modified for more than two lists. |
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Mar 31 |
comment |
NDSolve event handler Question with v9, this works NDSolve[{y''[t] == -9.81, y[0] == 5, y'[0] == 0,
WhenEvent[y[t] == 0, y'[t] -> -0.95 y'[t]]}, y, {t, 0, 10}] (again from the docs) |
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Mar 30 |
comment |
Creating a list from other lists and varying the number of elements that get added "Where I tell Mathematica how many copies of a particular element to make in listC" in what format do you want to supply this information? |
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Mar 30 |
comment |
Numerical partial derivative as an aside, the code for ND is freely visible (it's in AddOns/Packages/NumericalCalculus/NLimit.m). |
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Mar 30 |
revised |
NMinimize usage deleted 238 characters in body |
