2
votes
1answer
193 views

Export data from remote kernel onto a local machine

I can not access the directory on my remote kernel these days. Therefore, I want to export the output of the computations to my local machine. Some details: My remote kernel is on a Tyan TX46 with ...
5
votes
1answer
634 views

Integration over region given by inequality [duplicate]

Sometimes we need to integrate over some bounded region given by inequality/inequalities. Consider the following simplest example of area of an ellipse (LaTeX code): $\int_S dx dy$, where $S = \{ ...
4
votes
4answers
5k views

How to export data files using specific format

Very often, I have to export data files from Mathematica. These output files contain several columns and hundreds of lines with data. For the sake of the question let's create a sample list ...
1
vote
2answers
143 views

Math text is reversed using Graphics3D [duplicate]

I'm trying to display the text $y+\tau\theta$ using the following graphics directive inside a Show[] with several other graphics objects: ...
0
votes
3answers
326 views

Finding an index with certain conditions

EDIT: I need to find out an index i which depends on certain conditions and I'm not able to implement it. I have a list (time points) $t_i$ and two constants $a,c$ ...
4
votes
1answer
247 views

How to make “Text” Cell which does not auto-format in TraditionalForm in-line math expressions?

This is a continuation of the previous post: How to enter textual subscripts and superscripts?. When dealing with complex in-line math expressions inside a "Text" ...
7
votes
5answers
1k views

How to enter textual subscripts and superscripts?

When I add a sub- or superscript to a letter in a "Text" cell using the "Writing Assistant" palette this letter becomes Italic: ...
0
votes
2answers
254 views

How can I get the approximate analytical solution to this simple algebra equation?

Is there a way to get the analytical form to the root of this equation 2 A e (-ArcTanh[smax/s0] + ArcTanh[(smax Cos[w \[Zeta]])/s0]) == F0 ...
7
votes
0answers
271 views

What are the known differences between Save and DumpSave, and how to account for them?

Edit: I changed the title and (slightly) the wording of this question in order to make it more easily answerable. If I evaluate this in Mathematica 9: ...
0
votes
1answer
133 views

Can't see dynamic updating when my function is evaluated inside Dynamic [duplicate]

I defined a function, solve, with a free variable n, which changes while solve is running. Therefore, evaluating ...
9
votes
5answers
571 views

Counting the population of integers

Suppose that myData is a list of sublists. Each sublist has a length of one or greater and contains any number of replicates of the integers 1, 2, 3, and 4. I ...
6
votes
2answers
302 views

Different highlight for each cluster in DendrogramPlot

Is there any way to have each cluster in the DendrogramPlot highlight in a different color? I've tried the obvious way but it doesn't work: ...
0
votes
0answers
64 views

get while loop output into a list [duplicate]

I would like to get the output from this while loop and use it as a list so I can count the frequency of the various tuples.. ...
0
votes
1answer
263 views

Reap and Sow From NDSolve solution

I want to get the answer of my NDSolve in the form of table (the value of each x and y). ...
0
votes
2answers
141 views

How to get special solutions of this system of equations?

I only want to get all the solutions of this system of the solutions with a value of $k$, we have the same values ​​of $m$ ...
8
votes
2answers
246 views

Type conversion: LibraryLink mint vs. MathLink integer type

Assume the following situation: I have a WolframLibrary function which gets as parameter an integer tensor (which is for simplicity of rank 1) and the function should return an integer list through ...
3
votes
3answers
559 views

Is Table the only functional way to construct nested loops in Mathematica?

Suppose you have a cubic box containing identical particles and you want to compute the distances between each particle and every other particle in the box without double-counting (i.e., if you've ...
1
vote
1answer
199 views

Number with no decimal mark

I'm using Mathematica to create some images and labeling them after a simple calculation done previously. As the name of the file depends on the result, I want to show it with no decimal separator ...
0
votes
1answer
125 views

Differential Equation help

I have a differential equation that looks like this: ...
2
votes
1answer
544 views

Having problems with importing data in .dat format

I have a .dat file from FORTRAN output and I am trying to plot the results. The dat file is a series of rows with the row number as the first column. Now, every other row is empty, that may be ...
4
votes
1answer
460 views

Interrupting package evaluation, handling error

I have some packages/scripts that I schedule the execution using Jobs in SQL server. For example, in some of then, I use to create reports and delivery by mail using Mathematica. All done using ...
17
votes
1answer
724 views

Bug in Solve (Mathematica 9)

Just came across the strangest bug under both Mathematica 9.0.0 and 9.0.1. If one enters: Solve[m == p Sin[x] && -Pi/2 < x < Pi/2, x] ... then ...
6
votes
1answer
287 views

What algorithm is Mathematica 9 using for “SpectralEmbedding” of graphs?

When I specify that a graph should be realized using the "SpectralEmbedding" procedure, what paper / algorithm for spectral embedding is this based on? I was unable to find any documentation for ...
7
votes
1answer
252 views

ScalingFunctions not working properly for x-axis

I am trying to make a chart where the x-axis has a log scale and the y-axis is in reverse order. I tried to use LogLinearPlot, and I tried to combine it with ...
0
votes
1answer
343 views

Solve telling me all my solutions are zero

I'm trying to use Mathematica to solve a complicated system of equations. Here is a screenshot of the equations, and what Mathematica outputs. The variables $v_i$ and $w_i$ act as constants in ...
2
votes
1answer
288 views

Resetting an animation with a custom button

I have the following code, which accepts a function via an InputField, and then gradually draws that function in a Plot using ...
3
votes
1answer
289 views

Log function - why is Log[b,b] not being evaluated to 1?

Have been experimenting with the Log function to demonstrate simple Log relationships such as Log[xy], Log[x+y] etc. ...
8
votes
3answers
256 views

Retaining and reusing a one-to-one mapping from a sort

Imagine I sort the elements of an array $Q$ by some means. Perhaps I sort strictly by the elements in the first column, perhaps I use SortBy[...] to sequentially sort by the elements in successive ...
7
votes
1answer
160 views

SQL JDBC Zerodatetime

I am trying to query SQL data with MATHEMATICA - however, the MySQL database contains zerodates and that leads to the following error message: e.g. (1) *SQLSelect[conn, "orders", {"time_created"}, ...
-6
votes
1answer
396 views

How can I make a customized InputField for date inputs?

I want to make an InputField that only allows a specific date format to be entered. I want to display a field hint in the format "dd:mm:yyyy". Once the user clicks ...
9
votes
2answers
358 views

Is there a “GrabHand” and “OpenHand” MouseAppearance in Mathematica?

MouseAppearance[Plot[Sin[x], {x, 0, 5}], "LinkHand"] Unfortunately I cannot get a screen grab to show the link hand but it is a cartoon hand with a finger ...
5
votes
1answer
209 views

Summing tensors in mathematica

How do I perform the following summation in mathematica? \begin{equation} \Sigma_{m=1}^5 e_{ijklm}A^{mn} \end{equation} I have the $e_{ijklm}$ tensor of rank 5 in 5 dimension as a array and $A^{mn}$ ...
21
votes
5answers
2k views

Mathematica Implementations of the Random Forest algorithm

Is anyone aware of Mathematica use/implementation of Random Forest algorithm?
13
votes
2answers
525 views

How can I get LineLegend to pick up my plot's BaseStyle?

The new legends functionality in version 9 really simplifies creating legends, and it automatically picks up the styles of the lines. ...
2
votes
1answer
163 views

Repeating the contents of one cell in another, in “real time”

How could I create two Input cells, such that when the first is evaluated, the contents of the first are copied to the second? So for example, there would be two empty cells - let's call them A and B ...
5
votes
2answers
325 views

Splicing a list of arguments into a function with Sequence

Not sure if this has been asked, but I have a fairly simple operation that I don't know the syntax for. Say I have an array with some values, and a function f that accepts an arbitrary number of ...
5
votes
1answer
191 views

Strange Behavior with RegionPlot

Consider the following code. RegionPlot[Print[{x, y}], {x, -2, 2}, {y, -2, 2}, PlotPoints -> 2] ...
3
votes
1answer
267 views

Wavelets: Relative error vs compression ratio

I need to plot the relative error vs compression ratio diagram of a discrete wavelet transform on an image, but no luck so far .. Here's the problem in short: random_image.jpg compress the image ...
2
votes
0answers
73 views

How do I eliminate the breaks in a 3D plot with a Max or Min function? [duplicate]

Whenever I make a 3D plot using the Max or Min functions, I get breaks in the plot when it switches from one expression in ...
15
votes
2answers
4k views

Creating a simulation of our Solar System

As the title says, my objective is to create a simulation of the motion of the planets in our Solar System using Mathematica. All the theoretical background regarding the equations of motion of ...
14
votes
1answer
549 views

Efficient code for tallying entries in very large lists

I am dealing with data sets containing tens of millions of (hashable) entries and simply using the Tally function to count the frequency of each unique list element ...
0
votes
2answers
361 views

Converting a list of replacement rules into a list of real values [duplicate]

The following command outputs a list of replacement rules. ...
8
votes
1answer
190 views

Locator Appearance

I am using LocatorPane with LocatorAutoCreate -> True. I would like to have the appearance of each new locator be different. ...
7
votes
3answers
531 views

Plotting a 3D list causes kernel to crash if x and y axes have vastly different scales

I have access to two versions of Mathematica, version 7.0.1 on Linux and version 8 on Windows. When I try the following two lines on version 7, the kernel quits when it tries to plot. In version 8 ...
1
vote
3answers
198 views

Using Outer with Compiled functions that accept more than 2 arguments

How does one use Outer with a compiled function that accepts 3 or more arguments. Alternatively, how does one create a compiled function with 3 or more arguments ...
2
votes
1answer
324 views

Using mesh for a single function inside Plot

Plot[{Sin[x], Cos[x]}, {x, 0, 10}, Mesh -> {{0, \[Pi]}}, MeshShading -> {Black, Red}] In the above, how can I specify that I want the mesh for just, ...
1
vote
1answer
185 views

Big spaces between legend positions

I am trying to make a legend for my plot. Actually, I made one, but I cannot understand why there are such big spaces between the legend positions. ...
3
votes
2answers
751 views

Parametric differentiable interpolation of a 2D data set

I have a set of data ...
11
votes
4answers
3k views

Why does Mathematica struggle with solving this equation?

Consider the evaluation of the following expression In[20]:= Reduce[ 1000 * 1.0609^t == 1500, t] ...
4
votes
2answers
439 views

ListLinePlot filling for accumulated data

I have 23 variables (energy production units) which take values for each hour of the day (energy dispatch table). Here is a PasteBin example of data. I am trying to represent the distribution of the ...

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