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Alex Kerzner


Last seen: ungefär 4 år ago |  Active since 2017

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How can I compute the inverse FFT "manually"? How are the FFT wavenumbers ordered?
Hi all. In my efforts to try to understand the FFT, I am trying to understand the following example: Let Z = [z1, ..., zn] (n...

mer än 7 år ago | 1 answer | 0

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Answered
How to use an index of a vector as a value in another matrix?
I'm sure someone can come up with something more clever and efficient, but here's something hack-y that might give you some idea...

mer än 7 år ago | 0

Question


Adding points to a periodic contour using a trigonometric interpolant
I have a closed curve in the complex plane, call it Z = [z_1,z_2,...,z_n]; with all entries complex numbers. I'd li...

mer än 7 år ago | 1 answer | 0

1

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Question


Two functions which are identical except for one very small summand. Why does the ODE solver take orders of magnitude longer to solve the one without the summand?
I have two functions, which are identical save for one very small summand. When I try to run ode113 (or ode45 for that matter) t...

mer än 7 år ago | 1 answer | 0

1

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Question


Help understanding the syntax of an ODE
I'm trying to understand how the following syntax is interpreted in trying to solve an ODE: I have [T,ZZ] = ode113(@(t,...

mer än 7 år ago | 1 answer | 0

1

answer