All Questions

4 views

ButterworthFilterModel consumes the memory too much

I have a simple filter which is a result of the these questions here and here I have to use this filter in a Do loop but I found that this filter consume the ...
18 views

Express the WhiteNoiseProcess in number form

I have this function However, I want to export its values so that I can plot the graph in the TecPlot May I know How to achieve that.
118 views

NDSolve There are fewer dependent variables, {V[S,t]}, than equation

I am trying to solve the BlackScholes PDE for Barrier option. It works fine for european barrier, but errors out on american boundary condition ...
18 views

Using DSolve for a Nonlinear DE, list encountered error

I'm trying to solve a nonlinear differential equation using DSolve. I type in ...
23 views

Bourdet Derivative — indexing list elements

Used by petroleum reservoir engineers to diagnose well behavior, the Bourdet Derivative is defined as follows: Simply, it is a weighted central-difference derivative of {time, pressure} data. I ...
33 views

What does GLTest do and what are the consequences of it failing

Antialiasing has never worked with 3D graphics in Mathematica on my linux machine. The solutions listed in the related topic don't work in my case. System specs: Mathematica 10.0.2.0, Xubuntu 15.10, ...
52 views

Wrong root when using numerical values

I have the following inequality: $$\sqrt{\frac{a}{2x}}+ \frac{b}{1-\frac{a}{a+\sqrt{a(2bx + a)}}} + \frac{a}{2x\frac{a}{a+\sqrt{a(2bx + a)}}\left(1-\frac{a}{a+\sqrt{a(2bx + a)}}\right)} < f$$ on ...
21 views

DateListPlot inside DynamicModule updates continuously

Can any one try this code and see if it is updating continuously without changing the controllers: ...
29 views

NIntegrate problem with limits in triple integral

So I am trying to solve a triple integral in mathematica, but I am getting errors regarding my limits of integration. This is my code: ...
42 views

Seeking for method to speedup and get more flexable control Notebook History

When doing calculations in notebook, I modify the code a lot, and there are several versions of similar codes in the same notebook. But I found myself easily forgot which version is the newest, and I ...
53 views

More elegant function construction for blues loop

Is there a more elegant way to do this: ...
32 views

...
26 views

development of probability formula of the sum of events how?

For any finite sequence of disjoint sets, $A _ {1}, A_ {2}, A_ {3}, ..., A_ {n}$, we $P(\bigcup_{i=1}^{n}{A_i})=\sum_{i=1}^{n}P({A_i})$ As I get Mathematica develop this formula to ...
28 views

Function of surface roughness

How do I draw with Mathematica a function like this? I would use a series of circles and find the surface. Thanks!
82 views

Ploting a parallel graph for an animation

I am sorry that my attempt to obtain a fully functional plot as I want failed badly because I am not able to integrate the features to the graph. Here is my simple code: ...
51 views

How to delete certain words from a word cloud in mathematica?

I generated word clouds from a text file in Mathematica. I was able to remove words with 5 or less characters from the cloud. ...
21 views

How to obtain differential consequences of linear transport equation automatically?

Motivation Here I've asked how to derive coefficients of numerical approximation of the linear transport equation $$u_t + u_x = 0, \tag{1}$$ on a fixed 3-point stencil automatically and here I've ...
45 views

Reducing the size of exported .eps files to the minimum necessary

Running version 10.3 on my Power Mac with 22 Gbytes of memory I can create and export an .eps or .pdf graphics such as, ...
21 views

How to set variable initial values in NDSolve?

Currently I'm trying to make a simulation of a swing by maneuvre, in which I send a probe around the Moon. For now there is only the probe and the Moon but eventually it will be expanded. I'm doing ...
31 views

Finding the positions DateList dates in a range in large data set

There are similar questions to this like list search but this question is focused on finding at subset of dates in DateList format within a range of specified dates ...
20 views

Mathematica Stops Working

When I run the following code (taken from a Mathematica Blog) which is solving the NS equations; ...
52 views

Translating syntax of a pure function

I have a matrix in complex exponential form. I want to factor out the complex exponential form and then express the inside in the a+i*b form. For example: \begin{bmatrix} e^{i \frac{\pi}{4}} ...
58 views

RunProcess not working on my Windows system

System: Windows 10 professional. Mathematica Version: 10.3.0 English. RunProcess doesn't work in my computer. I tried different examples given in the ...
98 views

Solving diffusion-like PDE for f(r,t)

I am trying to solve a partial differential equation like the following: where Sigma is mass density as a function of radial distance r and time t. I am expecting a diffusive behavior, and the ...
43 views

Duration of each note $\pm \epsilon$

Apologies if this has been asked before, but I can't seem to find a solution. I have a little track - eg: ...
35 views

Find all solutions which satisfy the given conditions

Let $$m=9n^3+30n^2-9n$$ where $n \in \mathbb{Q^{+}}$ and $m \in \mathbb{Z}$ . Find all solutions which satisfy the given conditions. So I've tried to solve this manually and I was ...
92 views

Orderless and Sequence

I just ran into the following subtlety. Let us consider a function f with attribute Orderless. ...
98 views

258 views

Changing scroll rate for page down key? [on hold]

I have a presentation remote that allows me to advance Mathematica slides in the SlideShow environment. The control sends a page down key. Some of my slides ...
49 views

Getting axes range from plot (of the plot) [duplicate]

Related to this question in a way. After making a plot, I'd like to get the plot range (not the range of the function, but the range chosen for plotting which usually leaves some buffer room). I've ...
414 views

Advanced graphics with Mathematica

Ten years ago I bought a book by Tom Wickham-Jones, Mathematica Graphics: Techniques and Applications. I read parts of it but then I forgot its existance. In recent years I read the nice book of ...
146 views

intersecting cylinders

I try to replicate the two figures of two intersecting cylinders from here. I tried ...
192 views

Coordinate system transformation problem (about Euler angle)

This question comes from the work that constructing the general cylinder by the NURBS. I have implemented the point-set $P_1,P_2,\cdots,P_n$ that in the $O-xyz$ plane, now I want to implement the ...
33 views

How to find x intercept using two functions in NDSolve?

I have functions for x[t] and y[t] in NDsolve and I want to find where the graph crosses the ...