1
vote
0answers
48 views

Cannot open WolframAlphaClient` [closed]

When I try to use WolframAlpha, GeoGraphics, etc. in any manner on my Linux machine I receive errors about ...
3
votes
0answers
97 views

Problem with FTP import in V10

Mathematica V10 returns an error when download directory. URLFetch :: invhttp: "FTP: could not retrieve (RETR failed) the specified file." V9 successfully retrieves the same reference. This ...
7
votes
4answers
192 views

How can I add a tangent arrow at a certain point of a curve in a LogPlot?

How can I add an arrow at a certain point of a curve with the direction of the arrow tangential to that point? (Line are not straight in a log-plot.) ...
3
votes
1answer
59 views

SpeechNavigation option. What is it for?

Could somebody please explain what is the use for SpeechNavigation option found in the option inspector?
3
votes
1answer
144 views

Issue in ParallelTable after evaluating another function using NDSolve and FindRoot. What is wrong with this inverse?

I am trying to find the inverse of a function which is defined through NDSolve and NIntegrate. The question is pretty similar ...
4
votes
2answers
103 views

Plotting Semi-hollow spheres [duplicate]

I wish to create a nice data representation of three nested spherical sections, with a cut away so they can be viewed. As a MWE, something like; ...
5
votes
1answer
92 views

Extending a ternary plot to a tetrahedron (using ListPlot)

I have been making ternary plots of data that is a list of sets of 3 numbers, where the numbers in each set sum to one (call this "DATA"). To do this, I first transform DATA onto the 2D surface with ...
0
votes
0answers
24 views

How to prevent function from substituting the part of the parameter name if it has a subscript? [duplicate]

I have the following problem, when defining and using a function, that's supposed to have an outside parameter xmin: A[x_] := Exp[-x/Subscript[x, min]] A[5] ...
3
votes
1answer
89 views

Already solved DE, now I need to rearrange and plot

I have solved for $z(w,x,y)$ in a differential equation: $$ 3\frac{\partial z}{\partial y} = 2(z-1) + (1-wy^2 )x $$ And I obtained the general solution: $z = f(w,x,y)$ Now putting in $x=0$, we have ...
9
votes
1answer
198 views

Styling of logarithmic tick marks in Mathematica 10

I'm trying to plot a graph wit a logarithmic y-axis. Since I'm exporting the graph to pdf and later printing it, I want to manually set the frame and tick marks to a reasonable thickness. However the ...
2
votes
1answer
208 views

Make a scatter plot

Considering I have weather data for last 10 years for London, how can I make a scatter plot that will show the previous day's temperature as a function from today's temperature?
2
votes
1answer
166 views

Finding average error of the data

Considering I have some data, and I want to fit the data to a linear fit and find the average error from the linear fit, how can I do that using Mathematica? I have ...
1
vote
2answers
48 views

How can my Manipulate be aware of a local variable inside a nested Module

I have 3 sets of 5 x-y points: RandomInteger[10, {3, 5, 2}] I want to display only one set of points at a time, and use a slider to move on to show the next ...
1
vote
1answer
33 views

FullSimplify ratio of two gamma functions

I have the following input m = 2; Gamma[n + m]/Gamma[n + 1]; FullSimplify[%] It gives me 1+n For ...
-1
votes
1answer
88 views

Navier–Stokes equations [closed]

how write Stokes equation in mathematica? the Stokes equation is in in this link http://en.wikipedia.org/wiki/Navier-Stokes_Equations
2
votes
2answers
61 views

Improving the speed/efficiency of multiple (finite range) convolutions for a causal response plot

So I am looking at modelling the response of a system that is excited by multiple pulses over a period of time. The way to find the response at time t is to take the convolution between the impulse ...
-2
votes
1answer
42 views

Compile Determinant [closed]

I would like to determine the determinant of a 4x4 matrix with the entries a[i,j] being functions of $i$ and $j$. I used Compile with code: ...
0
votes
1answer
35 views

how to use Tooltip with a Dynamic point

consider this example: ...
1
vote
3answers
112 views

Random reals according to conditions

I'd like to create a list of triplets $(x,y,z)$ which satisfy the following properties: $$0<x<1/2 \\ 0<y<1/2-x \\ -1<z<-2(x+y)$$ Basically I would like to uniformly generate random ...
1
vote
1answer
62 views

How to “merge” various graphics 2d into one 3d graphic? [closed]

I did some calculations and as result got a 2D graphic, but at the beginning of the work I used a constant parameter. What I want is to make a 3D graphic with this parameter as an axis, varying from 1 ...
13
votes
2answers
200 views

Convert spectral distribution to RGB color

Presume I have a spectrum as a function of wavelength (an example being the blackbody spectrum): I want to convert that to a single RGB color to display on-screen, i.e. the "color" of that object ...
8
votes
3answers
394 views

How can one draw a network with nodes and links in a grid shape?

I'd like to be able to use MMa's graphics to make something like this which I know must absolutely be possible (and probably easy) with MMa. I don't actually even need different colors (though ...
2
votes
0answers
40 views

How to copy text from InputField

The problem when you copy text from one InputFiled to another. Inserts in unnecessary places gap. For example copy the text "#bbb" (without the quotes) from one field to another get "# bbb" (without ...
6
votes
2answers
77 views

Complex result for Real vectors in VectorAngle

I was expecting a real angle using VectorAngle when passing real valued vectors, however I obtained a complex angle. ...
1
vote
1answer
37 views

Get rid of “Testing Notebook” toolbar

I was messing around with different styles and tried the MUnit style. I converted back to Standard Report but I still see the toolbar for testing notebook. Is there a way to get rid of it?
3
votes
0answers
69 views

Why am I getting a kernel crash on Chop?

First post, hopefully I figure out the formatting easily. Please forgive me if this posts ugly. I am having a (repeatable) problem where when I run my code everything works fast and the output is ...
5
votes
1answer
175 views

How can I make a “self-referential” replacement operation self-contained?

Fairly often I find use for replacement rules that call themselves on the right-hand side of the rule, e.g.: ...
-4
votes
1answer
235 views

Test a wooden board's vibration mode

Here is a wooden board, with dimensions shown on the picture below. How we can use Mathematica's newly build-in finite element analysis features to show the different modes of its vibrations. Assuming ...
1
vote
3answers
121 views

How to ReplaceAll independent of depth?

I have a big list which in principle can be described as this more compact list : ...
1
vote
0answers
61 views

How do I choose only one branch of ArcTan?

I have a problem concerning ArcTan drawing a graph using ListPlot. I import a table of data: ...
0
votes
1answer
65 views

Plotting 2D color function on the plane [duplicate]

Suppose p is a some point in the plane. The function f[q] defined as ...
2
votes
0answers
34 views

Is it possible to Compile the function with string argument?

As we can see from the Compile documentation, the typical arguments for Compile should be ...
1
vote
2answers
94 views

Using compiled function inside NMinimize

Consider this code: ...
2
votes
0answers
48 views

Download a notebook (or any type of file) from the cloud

Let us say that I have a Notebook in the Wolfram Programming Cloud called foo.nb. If I try CloudGet["foo.nb"], what I get back ...
1
vote
2answers
126 views

How to use Compile

Consider the code below: variable = Sin[x]; fun = Compile[{x}, variable ]; fun[1] When I do this I get the error: ...
0
votes
1answer
67 views

Faster code for solving an equation with parameters

I am new to Mathematica and wanted to solve an equation that depends on parameters. The code is below ...
2
votes
0answers
53 views

Adding an unused column creates an error in JoinAcross

I'd been having trouble using JoinAcross on two datasets. After going through the answers to my original question and fixing my code, I find I'm now having a ...
3
votes
0answers
24 views

Create custom mappings of Mathematica Expressions => Java Objects?

I would like to call a JLink-based java function from Mathematica with a Mathematica Span[] object as shorthand, like so... ...
2
votes
1answer
66 views

Missing functions in the Raspberry Pi V10 release

There are a few Mathematica users beside myself that are running it on a Raspberry Pi, and we found out it does not always perform the same as the Desktop version [1][2]. During the testing of the ...
4
votes
1answer
107 views

Removing Linear drift from an oscillating data

I have an array of 800,000 data measured at 1.1s time gap. It is oscillating data but has clear linear drift. I want to remove this linear drift. But the estimates by ...
2
votes
3answers
178 views

How to obtain non-trivial solution of equal ratios

How can I obtain a non-trivial solution of the following: $$\frac{a}{b+c}=\frac{b}{c+a}=\frac{c}{a+b}$$ The answer is $a=b=c=1$.
1
vote
1answer
45 views

Solved the differential equation, how to rearrange to find solution? [closed]

I have solved for values of $y(x)$ from $1 < x < 2$ and plotted them: ...
0
votes
0answers
15 views

Option AutoAction of Manipulate doesn't respond under Ubuntu

I'm using Mathematica 10.0 under Ubuntu 14.04. When using the function Manipulate with option AutoAction, I find that the slider doesn't respond to my mouse ...
0
votes
3answers
140 views

Avoid creation of OwnValues when inserting transformation rules into Experimental`OptimizeExpression

I have a large list of transformation rules that I want to simplify. I find Experimental`OptimizeExpression works as it gets me the answers. My question is: **I can only get this to work when I ...
0
votes
0answers
33 views

How to extract data from a plot? [duplicate]

Here is the equation I want to plot, ...
2
votes
0answers
31 views

Evaluating standard functions of general quaternions symbolically

Mathematica can easily compute exponentials and logarithms of concrete quaternions: ...
0
votes
3answers
58 views

Unexpected behavior of rule-replacing with string concatenation [closed]

Here's the code. Clear[x,y,z]; {x,y,z} /. x_ :> ("^_^" <> ToString[x]) I get the result ^_^{x, y, z}, which is not ...
5
votes
0answers
62 views

Does a running evaluation continue after the PC wakes from sleep mode?

I was wondering if there are any issues with running a process on Mathematica, putting the computer to sleep, and then waking it up sometime later? It seems to work just fine on my test process ...
8
votes
2answers
107 views

Issue with Mouseover within Geographics

When using Graphics, I can change the color of the object with the use of Mouseover. ...
1
vote
0answers
44 views

Is there any metadata-holding mechanisms in Mathematica programming similar to Java annotations?

I'm re-implementing some tools previously implemented in Java in Wolfram Language. Is there any metadata-holding mechanisms in Mathematica programming similar to Java annotations?

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