# All Questions

75,565 questions
Filter by
Sorted by
Tagged with
14 views

### Fourier and Table to evaluate coefficients

How can I use the DFT to evaluate the N Fourier coefficients using Fourier[] and Table? Where (N=2^5, it is the number of ...
12 views

### How to make FindRoot work with PolyLog functions

I have the following code: ...
27 views

### Nested Map. Iteration over a list

I am trying to add an element to a nested list. An example of the nested list is given below: cordxy = {{{1, 2}, {3, 4}, {5, 6}}, {{7, 8}, {9, 10}, {1, 2}}} I ...
14 views

### Fast Evaluation of a series of dot product

Context I have a function that depends on 3 real variables x,y and z and that is defined by a series of matrix products. The evaluation of f for a specific (x,y,z) is fast ~0.02 sec but I want to ...
8 views

### How to apply GeometricTransformation to ArrayPlot?

In a previous version of Mathematica (maybe version 7), it was possible to use GeometricTransformation on an ArrayPlot. That ...
10 views

...
38 views

### Problem with NDSolve and piecewise functions: Failure computing Filippov continuation

I am trying to solve a first order differential equation using NDSolve. The differential equation is ...
19 views

### Adding texture to thickened line

Continuing from here, I would like to Texture lines with thickness. I tried using the normal and the binormal from ...
85 views

### Converting Strings to Reals in a List

I am new to Mathematica and working with streamed data: ...
60 views

### Mathematica Code to create geometries

I want to create geometries. How to create shapes like this in Mathematica?
131 views

### Recreate specific plot in Mathematica

Can anyone help on this ? I did this ...
17 views

### FindMaximum::eit: The algorithm does not converge to the tolerance of _4.806217383937354`*^-6_ in _500_ iterations

code for calculate parameters (https://i.stack.imgur.com/eVoi6.jpg) The value of parameters (https://i.stack.imgur.com/1O8wL.jpg)
7k views

### sprintf() or close equivalent, or re-implementation?

Is there a sprintf() command (some command that takes a printf-style format string and a list of values to insert into the ...
78 views

### How to represent DiracDelta?

I need to represent δ(t-t0). The hint is: In cases involving Dirac delta functions, onemay use the regularized delta function δ(t) = ε/[π(t^2 + ε^2)] approaching δ(t) in the limit ε → 0^+. But I don't ...
56 views

### How to get the right approximation for a harmonic series?

The right numerical value of the closed form of $\sum_{n=1}^\infty\frac{4^n H_n^2}{{2n\choose n}n^2}$ is $40.66752074791188333...$. I tried to verify this result on Mathematica using the command: <...
97 views

### Does anyone have a Mathematica implementation of the standard $\arg\zeta(s)$ function required to evaluate $S(T)$?

This question is related to my question Is there an elegant exact formula for the zeta zero counting function? on Math StackExchange. Question: Does anyone have a Mathematica implementation of the ...
47 views

87 views
+50

### ImageData of an image section

How can I take the image data of the area around a max? ...