0
votes
1answer
67 views

Shortcut to erase the line one writes on, equivalent to Ctrl+k for pico? [duplicate]

Every time I make a mistake (and I mess up quite often, since I'm new here), I loose time having to use the mouse to delete the traces of my mistakes: the blue vertical lines with the following ...
2
votes
1answer
47 views

Disable locator-removal in LocatorPane

is there a way to DISABLE the ability to remove points with ALT-click (APPLE-click) from a locator pane? I'm writing a code that allows users to manually label objects in an image by connecting two ...
1
vote
0answers
118 views

Request for clarification of Eigensystem::eivn message

What causes the problem of "two eigenvectors associated to one single multiplicity eigenvalue" that I am experiencing? After several transformations to simplify an unwieldy matrix, I end up with the ...
11
votes
3answers
337 views

What is the best way to flatten a linked list with lists as values?

By following the advice on this site I have ended up with a linked list like the following: acc = {{1, 2}, {{2, 3}, {{3, 4}, {{4, 5}, {{5, 6}, {}}}}}}; This was ...
3
votes
1answer
238 views

Recognizing Matching Colors in a Game Grid from a Camera Image

I am relatively new to Mathematica, having taken my first serious dive into it this week. As a fun project to teach myself some of the basics, I've come up with a goal of optimally solving a game ...
1
vote
0answers
42 views

How i can extract a single layer from a SHP file? [closed]

I just import a SHP file that have a series of layers, how can i get just one if i know the name of it?
5
votes
3answers
389 views

Not able to get a solution to a Lagrange Multiplier Equation

I assigned several constrained optimization problems to my calc IV students to solve with Mathematica, but this one is being stubborn. The function to optimize is: f(x,y,z) = y Exp[x-z] with the ...
5
votes
2answers
319 views

Getting the Cumulative Distribution Function of f(x) from a dataset of x

I've a data set $\mathcal{X}$ which consists of randomly generated numbers. Let's say for example data = RandomVariate[ExponentialDistribution[1], 10^4]; My aim ...
6
votes
2answers
186 views

MatrixPlot provides wildly inaccurate PlotLegend?

I noticed something weird with MatrixPlot's PlotLegends -> Automatic behavior- here's a minimal example: ...
2
votes
1answer
69 views

Error with comments inside and expression

I found this strange parsing error with comments inside of an expression in Version 7. And example is {{1, x}, {1, y} (* {1, z (= 5+6)} *)}; It occurs depending ...
4
votes
5answers
246 views

Extracting Coefficients from a List of Sines

I want to extract the coefficients from the following list: list={16.2219 Sin[16.2219 t], 6.60924 Sin[6.60924 t], 13.927 Sin[ 13.927 t], 2.91309 Sin[2.91309 t]} ...
2
votes
2answers
373 views

Legend placement explanation

Could anybody explain, how the coordinates in Placed influence each other? ...
6
votes
2answers
272 views

How to write complex function definitions at run time?

(Posting as a self-answered question to share a technique I discovered) In a certain project, I have many function definitions in which all parameters should be optional and come with default values. ...
2
votes
1answer
254 views

Problems with NDSolve and partial differential equations of several variables

Suppose we have the following partial differential equation: $$ 0 = \frac{ \partial w }{ \partial \tau } + \left( w + \sqrt{ h + \beta } \right) \frac{ \partial h }{ \partial \chi } $$ where $w$ = ...
1
vote
1answer
196 views

Why is my Fourier transformed matrix rotated?

After Fourier transforming and shifting the zero frequency of a matrix, my outcome is rotated by 45 degrees from what it should be. Can anybody spot why? ...
0
votes
1answer
58 views

Error messages from NIntegrate [closed]

I've been trying to work on some integrals (Actuarial Science, for those interested) but somehow this always returns an error for me. ...
8
votes
2answers
739 views

What is special about 70.329862 and InputField and Number and Dynamic?

Is this a bug (happening in V9 and V10 Windows, Linux) or not? It only happens for certain numbers and you need Number in InputField. ...
2
votes
3answers
138 views

Can you compute more terms in this sequence?

I am trying to identify a sequence related to the von Mangoldt function matrix. Since I believe/conjecture that the columns in the matrix have period lengths as in this sequence b: ...
4
votes
0answers
143 views

StyleSheet for custom application

I'm working on a package that needs to be installed into an arbitrary, "non standard" path (i.e., not $BaseDirectory or ...
1
vote
1answer
157 views

How to Use Mathematica as a C/C++ compiler [closed]

I am learning C/C++ programming, but I don't wannna install new software for compiling C/C++, so, is there any possibility to compile C/C++ code using Mathematica? Here is the first program I want to ...
1
vote
1answer
89 views

How to plot graphs with vertices positioned as spread as possible? [closed]

The following code, outputs the graph below: graphList = {{1, 2}, {1, 3}, {1, 4}, {2, 5}, {3, 6}, {4, 7}} Graph[UndirectedEdge @@@ graphList] Is there some way ...
1
vote
2answers
449 views

Colorful and eyecandy text by Mathematica

I want to present my work somewhere and thus I made a Powerpoint presentation. I am wondering if it is possible to make a colorful and stylish text by MMA. For example at the end of my presentation I ...
4
votes
0answers
100 views

Monitor progress of ZIP file extraction

Importing a ZIP file containing potentially many individual files in a (custom) format using Import[filename, {{"*"}, "Gaussian"}] takes quite a while. How can I ...
1
vote
1answer
79 views

Transforming a nested list for textual output

Hello I have a data structure based on lists, with items, subitems and subsubitems, and I want to display a textual output with a description. ...
9
votes
2answers
229 views

Add reference letters to multipanel figures

I want to create a multipanel figure like that and so I would like to add a letter "A", "B", etc to each of the panel I've created. I usually first create each panel with the letter and then ...
13
votes
2answers
201 views

Listable functions thread over Associations; is this documented?

Thanks to a somewhat misapplied use of MapThread I learned of this behavior: ...
1
vote
0answers
38 views

Need a recommendation for managing a database link

I want to make a package which needs to have a external database link. But it is hard for me to have an idea about how to manage the database link. I want the link to be connected as long as I use the ...
8
votes
3answers
182 views

How does MapThread work with Associations

According to the documentation, MapThread works on Association objects. But it doesn't seem to evaluate the passed function. For ...
1
vote
0answers
122 views

Numerical solution to two non-linear coupled differential equations [closed]

I am trying to solve two differential equations representing the position of an object in space. I have specified arbitrary initial conditions. ...
5
votes
1answer
288 views

Integrate wrong for absolute value of trig function

I was trying to get $\int_0^1 \lvert \cos(2 \pi k x) \rvert \,\mathrm{d}x$ for $k \in \mathbb{Z}$, and was surprised by the result (using Mathematica 10.0.1.0): ...
1
vote
1answer
200 views

Simplify a series expansion including product and multiplication

I have a following expression $$ f=\Pi_{i=1}^n \left[ 1 + \frac{1}{t} +\frac{ (m+i)}{t^2} +\frac{ (m+i)^2}{t^3} + \cdots \right] $$ here $m,n,t$ are positive integers. I want to obtain a series ...
2
votes
1answer
171 views

Getting errors when I try to evaluate code taken from Trott's Mathematica Guidebook for Graphics

I would like to learn how to make high quality images in Mathematica. In my pursuit, I have come across Michael Trott's Mathematica Guidebook for Graphics. I have been trying some of the examples, ...
0
votes
2answers
60 views

How do I generate a list of delayed rules? [duplicate]

I want a list like this: {x :> Print[1], x :> Print[2], x :> Print[3], x :> Print[4], x :> Print[5]} I tried: ...
2
votes
2answers
104 views

Providing wrong answer on integral $\int_{-\frac{2}{3}}^{\frac{2}{3}} \left(\text{Ln}\left(\cos ^4(x)\right)+1\right) \, dx$ [closed]

I tried to evaluate the following in mathematica $\int_{-\frac{2}{3}}^{\frac{2}{3}}{1+\ln \left( \cos ^{4}\left( x \right) \right)}dx$ and got the answer as $0.91905 - 3.94746*10^{-16} I$. However, ...
9
votes
0answers
179 views

How to align rotated BarChart labels? [duplicate]

I'd like to use long text labels for a simple BarChart, but when I apply a rotation to label strings with different lengths the end of the text is no longer aligned ...
10
votes
1answer
356 views

Compose many Geometric Transformations for 3D Graphics

I'm struggling to understand what would be a good way to compose several geometrical transformations to create a single TransformationFunction to be applied to a ...
2
votes
3answers
251 views

Can you Plot over some range but apply the “Filling” option over a smaller range? [duplicate]

I would like to shade the area between a function, and a line, but only over a specific range. This range is smaller than the range of the entire plot. The example code and plot below make my goal ...
15
votes
6answers
752 views

How can I evaluate only a single step of a recursive function?

Let's say have a simple recursive function for the Fibonacci sequence f[0] := 1 f[1] := 1 f[n_] := f[n - 1] + f[n - 2] but I want to see how it will expand in a ...
4
votes
1answer
341 views

Using NDSolve to solve a system of coupled PDEs

I am trying to solve the Gross-Neveu model in one dimension for a specific soliton initial condition. I am trying ...
4
votes
2answers
157 views

Display full path of current notebook on title bar?

Is there a setting in Mathematica notebook interface to get the title bar to display the full path to the current notebook?
2
votes
2answers
267 views

How to combine ListPlot and ListPlot3D

Suppose I have a plane drawn by ListPlot3D and I have one intersection of that 3D image drawn by ListPlot. How can I combine ...
7
votes
2answers
194 views

Connecting to Microsoft SQL with version 10

After upgrading to version 10, functions relying on a connection to a Microsoft SQL database no longer work. When I attempt to open a connection with something like: ...
9
votes
3answers
494 views

Upload a file using a WolframCloud WebForm

I tried to create a Webform in WolframCloud that asks/browses for a file and then uploads it to a specific folder. The following are the directions I investigated but it does not work: ...
2
votes
1answer
128 views

Equivalent command to the Maple indets command

This carries on the discussion here and here. I had mistaken Variable[] to give you ALL variables in an expression, but apparently, it is not meant for that. ...
1
vote
0answers
72 views

Creating a matrix from a list of simultaneous equations

I have a list of n simultaneous equations of the form, w A[n] = (K[n,n+1]+K[n-1,n])A[n] - K[n,n+1]A[n+1] - K[n-1,n]A[n-1] ...
3
votes
3answers
99 views

Pattern for finding matches that are different [duplicate]

I am trying to solve the following problem. I have tuples of size 3 {{a, b, c}, {a, b, c}, {a, b, c}} I would like to find cases where all the elements in a ...
2
votes
0answers
47 views

Automating constructor definitions (OptionValue eval time)? [duplicate]

I'm settling in on a programming pattern for "constructors." I can illustrate the pattern with the following example, which defines a constructor newBar for ...
6
votes
2answers
361 views

2D smoothing spline interpolation

Does Mathematica have 2D smoothing spline interpolation built in? I requires an interpolation method with smooth first derivatives and cubic bivariate splines fulfill this nicely. In python I would ...
5
votes
2answers
414 views

Simplifying general solutions of differential equations (driven harmonic oscillator)

Solving general differential equations in Mathematica usually leads to somewhat unsightly results. As an example, consider the solution of the driven, damped harmonic oscillator: ...
3
votes
1answer
135 views

How can I connect the local minimum-value points between a series of curves by dotted lines?

I have a set of data obtained by NDSolve. After I plot it, I want to indicate some feature of the curves. For example, I want to link the local minimum-value points between these curves by dotted line ...

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