1
vote
1answer
55 views

Nothing happens when I click the mouse clicked on my graphics

I wrote codes to record list of coordinates when mouse clicked. It is expected that the coordinates should be plotted dynamically. But actually nothing happened. Can anybody help me to find the ...
0
votes
2answers
55 views

How do I get a Do function to create a list?

I have a Do function which gives me a column of expressions. How can I get the Do function to give me these expressions in a list. i.e The do function gives me this: a b c d I would like it do give ...
0
votes
1answer
63 views

Rotate points by 60° in 2D

I wrote this code, to rotate a list of points 60° about the first point in the list in 2D, but Mathemtica says: "Recursion depth of 1024 exceeded."
6
votes
1answer
108 views

Vertex displacement/merging in graph?

Given a Graph such as the one produced with the following code ...
3
votes
2answers
88 views

How to define multiple functions using a for command

Let's say I want to plot 10 graphs of those following functions. Since they are recursive functions, I cant make a table with 10 different initial conditions because Mathematica stores each value ...
2
votes
5answers
191 views

How to join two strings one of which is Subscript?

If I write this one str=Subscript["x","y"]; StringQ[str] False How can I get str as string?
1
vote
0answers
29 views

Plots to check all assumptions of linear regression

I'm running a linear regression with LinearModelFit and would like to plot graphs to check the assumptions of linear regression: linearity, independence of the ...
3
votes
1answer
95 views

How does Mathematica use system environment variables?

Is there a common way in which environment variables are accessed, stored, or used by the kernel? There are built-in functions for querying and setting vars in the system environment, but there are ...
0
votes
2answers
69 views

Open a .txt file in Mathematica [closed]

i have a .txt file written for Mathematica, but wenn I open it with Mathematica, there is just an unreadable text and no graphs and simulations like it should actually be, could you tell me how to ...
3
votes
3answers
59 views

Tooltip with ListLinePlot and interpolation

Is it possible to get the coordinates of any point on a graph using Tooltip, ListLinePlot and interpolation ? For example on this simple example ...
7
votes
5answers
697 views

Check if two lists are equal in any order

Suppose I have two lists, how can I efficiently check if the two lists are identical up to permutations of the elements? For example I would like the function to output: ...
1
vote
2answers
76 views

Change Temporary Directory

How to change the value of $TemporaryDirectory ? I need to change it because there is not enough space on the C drive and the calculation seems to stop after a while !
-4
votes
0answers
53 views

Need help with GRE study question [closed]

I encountered a question while preparing for GRE and am stuck. In an examination paper of 5 Questions, 5 percent of the candidates answered all of them and 5 percent none. Of the rest, 25 percent ...
3
votes
2answers
119 views

Equation of a transformed (roatted) ellipsoid [closed]

Given an ellipsoid with semi-axis {a,b,c} and cantered at {a,0,0}, how do I use ...
2
votes
2answers
107 views

Matching a case when one element in a pair is Null

I've got a dataset of laitutdes and longitudes. Unfortunately, some of the dataset was from when a time when lat/longs weren't constantly recorded. So I need to remove the invalid data before working ...
0
votes
2answers
69 views

Problem in downloading “ToMatLab” package [duplicate]

Iam trying to download "ToMatLab" Package from http://library.wolfram.com/infocenter/MathSource/577/ but it is showing me an error message by showing a big question mark and "File could not be ...
0
votes
2answers
48 views

Restrict plot of object to be below a given plane in a ContourPlot3D

In a ContourPlot3D, I only want to part of the plot. Such as the part of a cylinder that lies beneath a plane. ...
6
votes
0answers
57 views

ParametricPlot MeshStyle bug in v10?

The documentation gives the following code and says "Use a red mesh in the x direction and a blue mesh in the y direction:" ...
4
votes
1answer
57 views

Problem with Neumann condition in quarter disc

So I'm following the available examples in version 10 for FEM, The plane stress operator is shown as this ...
0
votes
0answers
70 views

Value-At-Risk (VaR) in Mathematica: InverseCDF or Quantile? [closed]

Calculating Value-At-Risk in Mathematica Obtaining data (Microsoft. Daily returns 2014): msftreturn = FinancialData["MSFT", "Return", "2014"][[All, 2]]; Code: ...
0
votes
1answer
67 views

Functions in functions

I have three functions f(x,y) , g(t) , and h(t) and somehow I have to find (d/dt)f(g(t),h(t)) where t = 0. How would I go about writing this in Mathematica? In this equation g(t) is taking place of x ...
2
votes
2answers
112 views

Solving 4 variable system of equations

Trying to solve a systems of equations. Here's the code: ...
2
votes
1answer
49 views

Problem with Style in a Plot

I would like to simply plot a density function $f_1$ and I would like to put a legend but I cannot do it as I wish. The problem is simple but I spent alot of time and couldnt solve it. I will be happy ...
1
vote
1answer
43 views

Automatically to add some points for a plot

Say I want to plot this Plot[x,Sin[x],{x,0,4 Pi}] And I want it to show 4 nicely spaced points, on the line. Is there an automatic way to do this? I was reading ...
2
votes
1answer
51 views

Struggling with FindFit

I'm trying to fit a sinusoidal wave to some numerical data. I can do it by hand using manipulate, so I know roughly the sort of parameter values that I should get back, but functions such as FindFit ...
-1
votes
0answers
39 views

Taylor Polynomials and Approximations in Mathematica [closed]

I have to solve number 112 parts a, b, and c and number 113 parts a and b using Mathematica. I am very new to Mathematica so any and all help would be greatly appreciated. Click the link below to view ...
3
votes
0answers
31 views

To UpSet or not to UpSet when using MakeBoxes

What is the difference between the following two: ...
2
votes
1answer
32 views

Truncating power series

I have the following typed up so as to truncate higher powers of $\tau$, ...
0
votes
1answer
57 views

Define a Recurrence Table involving other tables

I'm relatively new to using Mathematica. Previously I used Matlab, but lately I noticed that the numbers i got in both of them do not match (mostly it seems that Matlab lacks precision...). The ...
0
votes
1answer
75 views

Turning a 2D 3 body problem into 3D not so easy?

I have programmed a 3 body problem, that can in theory work for more than 3 bodies. I apologize in advance for the length of the code that I posted, I don't really know how much one would need to ...
5
votes
2answers
102 views

ListPlot inserts extra PlotMarkers and Mesh at crossing points

In the example below, ListPlot with PlotMarkers -> Automatic and a variant using ...
1
vote
2answers
40 views

How to fix the order in which text appears in an axis label (V7) [duplicate]

One of the AxesLabel is "$:\text{log}|\Phi8b(u)|\color{Red}{\text{Red}}$". Question: How to make it like: "$\color{Red}{\text{Red}}:\text{log}|\Phi8b(u)|$"?. My Mathematica commads: ...
7
votes
0answers
60 views

Is there a way to stop Export if the file size is too big?

I've got code that's exporting a file, but the file might be so big that it will take up too much space on the cluster I'm using and crash other users' processes. Is there anything like ...
2
votes
1answer
49 views

Identically styled cells from ToBoxes and Cell do not align

I'm trying to generate some worksheets using NotebookWrite so that I can control the page breaks, but have got stuck on the alignment as there appears to be a ...
7
votes
1answer
226 views

How do I generate cross sections of a 3D graphic?

I would like to approximate the volume of a bottle by summing up the volume of the individual disks. I have obtained code references from a demonstration. But how do I generate the cross sections? The ...
2
votes
1answer
81 views

Mean curvature of Sphere

I am trying to calculate mean curvature of a parametric surface(like sphere), and I wrote this code based on this discussion. Here is my code: ...
3
votes
2answers
180 views

Plane Geometry Diagrams With Labels

I can make some basic diagrams in Mathematica (stolen from their pages, for example see the below: LaminaData["FilledIsoscelesTriangle", "Diagram"] However, I'm ...
1
vote
1answer
52 views

How to calculate minimum positive solution of a equation?

Equations with triangular function usually have multiple solutions, like Solve[Sin[x] == 1/10, x] returns a solution like ...
1
vote
1answer
72 views

Problem using Compiled Function within NProbability

I've built a very simple function to estimate the probability for a Long Straddle (derivative strategy) to be positive at expiration. ...
0
votes
0answers
41 views

How to make an effective use of Mathematica to evaluate integrals, series, recognize closed forms, and do other manipulations [closed]

I would like to know if there are resources to learn how to use the functions of Mathematica in the most effective way in order to evaluate difficult integrals and series or find possible closed forms ...
0
votes
1answer
46 views

How can I stop the integration of NDSolve with a condition?

I try to solve a partial differential equation by NDSolve. At some point, I want to stop the integrating by a condition that compares the min value of the function ...
5
votes
2answers
113 views

Apply Trig Identity to Transform Sum of Sinusoids into Phase-Shifted Cosine Function

I'm trying to solve for the output of a simple RC low-pass filter, with Cos[w t] input. The convolution of the input with the RC transfer function gives me the right output, but I'd like to be able to ...
2
votes
0answers
93 views

What is the algorithm behind Mathematicas Reduce in this equation?

Mathematica can use Reduce to arrive at an answer in this equation ...
3
votes
3answers
166 views

Higher-order, nonlinear differential equation with Initial Values

I tried to solve for an non-Hookean spring's motion, but the output from Mathematica is weird. It seems that there is inverse functions involved. ...
6
votes
2answers
74 views

Mathematical operation on two lists by a “key” [duplicate]

I'm a complete newb here. Just looking for direction. I've got two lists like this... ...
0
votes
0answers
16 views

Size and Power of Test: Poisson Distribution [migrated]

In a homework problem, I am given a Poisson distribution with lambda = 1 as null hypothesis, lambda greater than or equal to 2 as an alternate hypothesis, and 3 as a test statistic. I am instructed to ...
2
votes
1answer
69 views

Image background subtraction using parallel computing

I am developing a program for pattern recognition. I want to use the parallel computing to get a real time application. I have two cameras where each one gives n frames/second. I need to process the ...
1
vote
1answer
68 views

Derivative of an expression containing a symbolic sum [duplicate]

Is there a general pattern for working with symbolic sums in Mathematica? For example here's a derivative I want to compute: ...
5
votes
2answers
165 views

Plotting two recursive functions

I'm trying to plot two recursive functions (p and θ) on a map. So far I have: ...

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