# All Questions

40 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}} ...
53 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 ...
82 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 ...
15 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 ...
26 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

### 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

### 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 ...
78 views

### Orderless and Sequence

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

257 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 ...
47 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 ...
407 views

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 ...
144 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 ...
32 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 ...
41 views

### How to add two probability density function plot in mathematica [on hold]

The mean and standard deviation of plot 1 is [.38404, .03867] and of plot 2 is [.38404, .542]. With the mean and std deviation I can plot PDF(Normal distribution) using ...
84k views

### Where can I find examples of good Mathematica programming practice?

I consider myself a pretty good Mathematica programmer, but I'm always looking out for ways to either improve my way of doing things in Mathematica, or to see if there's something nifty that I haven't ...
53 views

### ListPlot of imginary part

Assuming I have a list like: {{1, 1. - 0.0169212 I}, {2, 0.99611 + 0.0326189 I}, {3,1.02048 + 0.0945609 I}, {4, 1.02722 + 0.138977 I}} When I try now ...
31 views

### For “ListPlot3D” ,How to make a color plot, if the f(x,y) range only from very small amount [on hold]

I have plotted with List3d plot using the following command ...
44 views

### Kernel crash when evaluating NDSolveValue

I had a code that was working fine and I tried to add an extra few lines to find the solution of the same equation with different conditions. The original NDSolveValue solutions work fine but when it ...
35 views

### Y-axis Tick labels are all identical [duplicate]

For Plot[x^12 - x^9 + x^4 + 1, {x, -.001, .001}] Details on Y-axis seem to be wrong.I am using V 9.0.1.0 .Bug?
425 views

### Random polyhedra walk

I would like to recreate ssch's random polyhedra random walk, which he posted in the chat. For convenience here it is again: This is my best attempt so far: You can download the notebook with ...
34 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. ...
32 views

### Avoiding Smoothing in ListSurfacePlot3D

I'm loading a dataset {x,y,z,v} from a text file. It is about a triangulated surface and then I am using ListSurfacePlot3D to plot it. However, ListSurfacePlot3D is ...
27 views

### Maximum Value of an Interpolating Function [on hold]

my code below does not output the correct maximum value. ...
95 views

### SubsetQ[] without ignoring duplicates

How could one create a code that checks whether a set is a subset of another, but not ignoring the duplicates? For example, $\{1,1,1\}$ would be a subset of $\{1,1,1,1\}$, but not vice versa. ...
570 views

### Magnifying Glass on a Plot

Although there is a trick in TEX magnifying glass but I want to know is there any function to magnifying glass on a plot with Mathematica? For example for a function as ...
38 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 ...
302 views

### How to code the following in Mathematica

How do I get the following into Mathematica, solving for a: $$0.7 = 1 - \frac{2}{a} \times [ \frac{1}{a} \int_0^a \frac{x}{\exp(x)-1} dx + \frac{a}{6} - 1]$$
352 views

### What exactly is Implies? Is it a logical test?

I ran the following to simplify my logical test (expecting something in terms of And and Or ...) ...
52 views

### Why won't DiscretizeRegion work with a custom distance function? [on hold]

I am trying (in 10.0) to create a region from a list of data points. I have created myDistance to use as the boolean test for whether or not a point should be included in the region ...
142 views

### Why am I getting different answers for an integral depending on method?

I'm trying to carry out an integral and I'm finding different answers depending on which method I choose to integrate with. I assume this has something to do with divergent pieces but I don't ...
32 views

### Trouble solving system of nonlinear equations with piecewise

Here is my code so far ...

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