1
vote
1answer
57 views

Min function for functions f1, f2, [closed]

There are several "min" functions in Mathematica. In the "Numerical" category, there is a "Min" function that works on a numerical list. Then there's MinValue for finding the minimum of a whole ...
4
votes
1answer
61 views

How to set default PageWidth for InputForm?

We can control the page width used by InputForm by applying SetOptions to "stdout": ...
9
votes
1answer
78 views

How to Copy formatted code without backslashes added?

By default code copied from the FrontEnd is formatted with backslashes added at the ends of lines. For example, evaluating in a Notebook Range[40] and copying ...
4
votes
2answers
261 views

Can I solve a certain equation?

Neither Mathematica nor Wolfram|Alpha can resolve the following. How else can I reach a solution? Reduce[(1 + x)^(2/m) - (1 - x)^(2/m) == (1 - x^2)^(1/m), x]
2
votes
1answer
98 views

How to use Compile to generate an $n\times n$ array using $n$ vectors

Let's consider the following: ...
-1
votes
2answers
43 views

Changing the precision of data in a list of matrices

I have a list of matrices ...
10
votes
1answer
102 views
4
votes
1answer
88 views

Vector tips seem to resize and get ugly in some situations

In Selwyn Hollis's CalcLabs with Mathematica, Multivariable Calculus, 5th ed., he does some nice initialization code for adding vectors to a plot. ...
2
votes
1answer
111 views

Unexpected Weierstrass $\wp$-Function Behavior

In Mathematica, the Weierstrass $\wp$-function is expressed by WeierstrassP[u + I v, {g₂, g₃}] where g₂ and ...
-3
votes
0answers
144 views

References to Mathematica Applications With Manipulate In Games/Sports [closed]

Background: I am currently using Mathematica to solve some, amateur (but very important!) chess team strategy, probability problems : see recent mathematical-optimisation post(s) for initial design ...
10
votes
1answer
79 views

Problem with Clear[assoc] as a value in an Association

According to the documentation, in order to make sure that a value in an association is not evaluated at initialization, one can use a RuleDelayed. This works fine: ...
27
votes
2answers
419 views

What is behind Mathematica's experimental `FindFormula` function?

In version 10.2 there is a new experimental function: FindFormula. I suspect that a genetic programming algorithm (symbolic regression) is behind this new feature ...
-1
votes
1answer
64 views

How can I prove the following equality [closed]

I have the following equality : $$\int_0^\pi \frac{\cos(2t)}{a^2\sin^2(t)+b^2\cos^2(t)}dt=\frac{a}{a+b}-\frac{1}{2}$$ where $0 <b \leq a$. I used the residues but I could not prove this equality
9
votes
1answer
90 views

Odd StringTake problem in Dataset

10.2 Win64 Works fine... Dataset[{<|"a"->"ABC"|>}][All, StringTake[#a,{1,3}]&] Explicitly taking the whole string using its length directly. ...
2
votes
2answers
68 views

Analytic differential of an inverse transcendental function

I have the following function: $$ y(x)=\frac{Ax}{Bx^{1/4}\sinh{(\frac{Bx^{1/4}}{2})}}\left(\cosh{(\frac{Bx^{1/4}}{2})}-1 \right), $$ where $A=112.941$ and $B=18.6588$. I want to find the differential ...
27
votes
2answers
1k views

How do I remove grid from this photo?

I found this cat a month ago, and I'm not his owners' friend so the mosquito grid was the inevitable problem. I would like to post-process this photo to get rid of it, but I don't know exactly how ...
0
votes
0answers
34 views

PlanetData “VelocityAroundSun” giving inconsistent answers

My goal is to create a ListPlot showing the Earth's orbital speed over the course of a year, with one datapoint per day. I'm seeing problems long before I even get to the point of plotting the data! ...
2
votes
1answer
46 views

Non-numeric elements in banded sparse array

The documentation mentions that "the elements in SparseArray need not be numeric", although "the individual elements of a sparse array cannot themselves be lists." ...
4
votes
0answers
35 views

TimelinePlot with Interval in Associations

This is related to a previous question I asked about TimelinePlot and multiple associations (Behavior of TimelinePlot with multiple datasets of associations), but ...
0
votes
0answers
62 views

Loss of chart when exporting data in DynamicModule

In DynamicModule, the result is to show a panel with a flowchart and a piechart. But when I export the dynamic result in a CSV file, the piechart will no longer ...
11
votes
2answers
188 views

What will happen if I set ExclusionsStyle for points in 2D plot?

For example f[x_] := (x^5 - 4 x^2 + 1)/(x - 1/2); Plot[f[x], {x, -1, 2}, Exclusions -> {f[x] == 0}, ExclusionsStyle -> Dashed] Has the ...
4
votes
2answers
156 views

How to obtain the area enclosed by such a curve?

The desired curve is defined as curve02 below : ...
2
votes
0answers
57 views

Does Mathematica have a plug-in for communicating with an Android device?

I am trying to take input from an Android device, do some processing in Mathematica and pass the final output back to the device, so I need a plug in to communicate to an Android device.
0
votes
1answer
49 views

smoothing plot edges

I have a data list as mydata: ...
5
votes
7answers
424 views

List manipulation challenge

It's necessary to get from list = {{a1, b1, c1}, {a2, b2, c2}, {a3, b3, c3},{a4, b4, c4}, {a5, b5, c5}}; I'd like to do this with ...
0
votes
0answers
47 views

How to parse fraction to a number?

Considering a fraction: val = "F \!\(\*FractionBox[\(1\), \(1\)]\)"; I extract the part of interest: ...
0
votes
0answers
11 views

Find new coordinates after rotating a shape centrally [migrated]

i want to find new points of shape in Cartesian coordinate system after applying an angle on shape. What is formula to find these points
0
votes
0answers
32 views

Dot production associated with comparison process of different matrices eigenvectors

With thanks to Guess who in the link module using.. We created functional 5*5 matrices: ...
0
votes
0answers
13 views

mathematica online variable naming [migrated]

I am new in mathematica Doing my best, still I don't know how to use a variable with a length higher than one. Here I use a variable called ba while wolfram alpha ...
0
votes
1answer
48 views

Module using for creating a table [closed]

I want to have a 4 tables with using of module. Unfortunately I don't know why doesn't it work ...
1
vote
1answer
62 views

Transposition of state space form of a transfer function

How can I transpose the output of state space model in Mathematica? trying the following code would transpose the top right symbol s instead of the matrices. ...
0
votes
2answers
81 views

Matrixform ndsolve for mobile robot dynamic equations

Error is: NDSolve::ndsdtc: The time constraint of 1.` seconds was exceeded trying to solve for derivatives, so the system will be treated as a system of differential-algebraic equations. You ...
3
votes
2answers
54 views

Factor a specific sub-polynomial?

Consider the following example for a polynomial in several variables: ...
1
vote
1answer
73 views

Multivariable Calculus Chain Rule

I am getting ready to write a notebook for the chain rule in Multivariable Calculus for my students. I do know: ...
6
votes
2answers
96 views

Passing an unevaluated part of an association to a function

I'm making a UI widget that controls sound volume on a speaker using a slider, e.g.: ...
0
votes
1answer
30 views

How to perform operations with vertices from any edge on a Graph object

I'm trying to get the vertices from an large list of edges on a Graph object in Mathematica 10. I need to operate them, adding, substracting dividing. As an ...
3
votes
2answers
122 views

Why do I need to apply DiscretizeRegion to a derived region to visualize it?

What are the design principles, or other explanations, as to why one needs to apply DiscretizeRegion to obtain a graphical representation of a derived region, ...
0
votes
1answer
45 views

Ndsolve parametricplot

Ndsolve solution cant manipulate parametric plot!! ...
1
vote
0answers
53 views

Sequence of arbitrarily many variables separated by commas? [closed]

I am wondering if it is possible to produce an input such as x[1],x[2],x[3],...,x[n] for an arbitrary but fixed amount of n ...
4
votes
1answer
78 views

Changing one line in code to Traditional Form?

I was watching this video: Animating Heat Equation. The speaker had this code (just prior to the 60 second time level): ...
2
votes
1answer
61 views

List of list to list of rules

I have a list of this type p = {{y, 1, 3}, {x, 2, 0}, {z, 3, 1/(k + 1)}} I can use a Do loop that is ...
2
votes
4answers
199 views

Is there a way to use array of data as a function variable?

I have a data that looks something like. {{1,1},{12,1},{7,9},{10,14}, ...... } I want to see if there is an easy way to apply this array of data into a ...
5
votes
0answers
86 views

Possible Bug with Options in DelaunayMesh

Update: It turns out after some testing, none of the Options work in DelaunayMesh when 3D point sets are involved. Original ...
1
vote
0answers
44 views

Transient PDE with a complex boundary condition

I am trying to solve a PDE, but one of the boundary conditions is complex, because it includes an integral over the function that I am looking for. The code is shown below ...
7
votes
1answer
97 views

Converting a Table to a Dataset

I feel like this is a simple task, and there may be a built in method to doing this (but I can't find it if there is). I would like to be able to take a table and convert it into a structured Dataset. ...
0
votes
0answers
4 views

What is the name of this theorem? [migrated]

What is the name of this theorem, or how to prove this? $f(x)=\displaystyle\frac{1}{\Delta x}\int_{x-\frac{\Delta x}{2}}^{x+\frac{\Delta x}{2}}h(\xi)d\xi$ $\Longrightarrow$ ...
-2
votes
1answer
32 views

How can I simplify this simple formula? [closed]

:) If we have x+(x*l), is it possible to simplify this, on having only one single x?
2
votes
1answer
36 views

Parallel kernels cannot launch: LinkOpen::linke error

I have been regularly using parallel kernels on my machine but this morning all I receive is a cryptic error whenever I call any parallel function (LinkOpen::linke). As far as I can see sequential ...
2
votes
2answers
140 views

SeriesCoefficients expansion contradicts FullSimplify

Executing the following SeriesCoefficient[Log[1/2 (1 + Sqrt[1 - x])], {x, 0, n}, Assumptions -> {n >= 1, n ∈ Integers}] I get: which clearly asserts ...

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