7
votes
1answer
344 views

Problems with “Test Connectivity” and the Pacletserver

I know there has been a similar questions to this already but the solution did not work for me so here again: I have internet connection and I can execute such commands like: ...
18
votes
4answers
545 views

Can a function be made to accept a variable amount of inputs?

I have a function that takes two inputs and processes them for a single output. What I need is one that can take a varying number of inputs. and process them to a single output. Is this possible in ...
0
votes
1answer
57 views

How write this Function with many arguments? [duplicate]

F[x1_,x2_,...,x99_]:=expr How to write this Function in mathematica whithout complete write it?
0
votes
0answers
38 views

Graphing a piecewise function with very different time scales? [on hold]

I'm trying to graph a piecewise function, but the issue is that in one part of the plot, for example, there is extremely rapid growth within a tiny fraction of a second. Then, in another part of the ...
1
vote
1answer
61 views

Optimizing evaluation time

I have the following code and it takes like foreeeeever to evaulate: ...
0
votes
1answer
42 views

Append subscript to variable name [duplicate]

I'm importing equations from Word document and transforming them into input form. But subscripts look ugly. Is is possible to programmatically append subscript to variable name? e.g. ...
0
votes
0answers
28 views

Solving a 2 by 3 matrix by S.V.D [on hold]

There is a method to solve a 3 by 2 matrix by U1=(1 upon sigma1)*A*V1. Should I solve this matrix (3*2) by V1=A inverse*U1*sigma1 or any other method?
1
vote
1answer
78 views

How to combine more locations (GPS coordinates inside one city) with Google map? [duplicate]

I have a list of GPS coordinates.E.g. GPSList = {{47.680800, 17.626446}, {47.681078, 17.627283}, {47.682759, 17.631810}}; I would like to crate a Google Map ...
4
votes
1answer
68 views

When to use GenerateConditions -> True

Many functions, usuallly those involving integration, take a GenerateConditions option which often defaults to False, or at ...
2
votes
3answers
198 views

Solve the system of equalities and inequalities

I have a system of expressions, in which each expression is an equality or inequality expression of the following form: Var = Var1 + Var2 Var $\odot$ number Var $\odot$ Var1 $\odot$ = $\leq | \geq | ...
0
votes
0answers
21 views

Understanding the parameters required for Regression Analysis [on hold]

I have some data I would like to perform some regression analysis on so that I can create a formula to predict y given x. I ...
4
votes
1answer
74 views

How to do assignments through MathLink?

In Mathematica I can make the assignment 'foo = bar' with Set[foo,bar]. However, if I try to evaluate 'Set[foo,bar]' through MathLink then it appears that MathLink gets stuck while trying to read ...
5
votes
2answers
107 views

Visualization of matrix transformations

I define the "matrix transformation" here as follows: $\left[ \begin{matrix} x_1' \\ x_2' \\ \end{matrix} \right]=\left[ \begin{matrix} a & b \\ c & d \\ \end{matrix} ...
0
votes
0answers
23 views

Series expansion hangs on second evaluation [on hold]

I use this code to get the binomial expansion of $ (1+x)^\frac{-1}{2} $ Series[(1 + x)^(-1/2), {x, 0, 30}] For the first time I excute the code it takes 0.036000 ...
1
vote
1answer
58 views

Selection of the position of the variable

I defined a function funloglogplot to make a loglogplot of a function (function1) depending on several variables ...
0
votes
1answer
52 views

Two questions on strategies for quantifier elimination

With the help of people here I was able to solve several cases similar to IC3 but this case - unlike the other cases - does not return an answer. I will try to run it for a day with 8 processors but ...
6
votes
4answers
2k views

How to generate and draw simple bipartite graphs?

A bipartite graph is a graph whose vertices can be divided into two disjoint sets. Given two lists: {1, 2, 3} and {x, y, z}, ...
0
votes
1answer
51 views

Text with date, how to convert?

I use this script to recognise a date in a textfile and write the result in another file. ...
4
votes
2answers
135 views

Finding the parameter that makes real part of an eigenvalue of a matrix 0

I have the following 3x3 matrix: $\left( \begin{array}{ccc} 0.04 -0.4 b & 0 & 0.04 -0.4 b \\ 0 & -0.08-1.2 b & -0.06-0.9 b \\ 1.04 -0.4 b & 2.08 -0.8 b & 0 \end{array} ...
0
votes
0answers
49 views

Visualizing Dynamic Time Warping [duplicate]

I need combine 3 graphics into something like this Any ideas?
1
vote
0answers
22 views

Minimizing roots of a transcendental equations [duplicate]

I'm trying to use the solution of FindRoot with parameters for further calculations. Annoyingly enough it always gives me trouble with replacing the parameters. As an example I'm attaching a simple ...
2
votes
1answer
137 views

Integrate does not accept my integrand expression

I want to calculate the symbolic integral, but I could not obtain the final results from Mathematica. ...
0
votes
0answers
24 views

partitioning up the time series data set in order to remove up the anomaly [on hold]

My problem is to detect anomaly in time series based data, for that i need to partition up the data according to their minima and maxima. For this i need to get the matlab code to find the maxima and ...
8
votes
0answers
77 views

Simplifying trig expressions containing Sqrt or Abs

The following Maple code can simplify abs(sin(x)) into -sin(x) given the condition ...
0
votes
1answer
48 views

Define function that goes from one point to another parametrically

I have two points p1 and p2, and I want to get the parametric equation of a linear function that passes through those, but ranging from one point to another. For example, if I have 2 points {0,0} and ...
38
votes
8answers
1k views

Updating Wagon's FindAllCrossings2D[] function

Stan Wagon's Mathematica in Action (second edition; I haven't read the third edition and I'm hoping to eventually see it), demonstrates a nifty function called ...
-2
votes
1answer
32 views

How to Show the “TemperatureMap” using Manipulate? [on hold]

How to show the "TemperatureMap" in Manipulate?. ONLY the image, without text "ColorData..." ...
0
votes
0answers
44 views

Main Kernel in Mathematica

I would like to copy some parameter from the main Kernel of Mathematica to the parallel kernels available. So I'm running now a command like: ...
0
votes
0answers
76 views

How can I plot my rather complicated function? [on hold]

I have been trying to plote the complex function $f(x,y)$ below, just $x=h(K)$, $y=h(K)$, where $K$ varies from 0 to 2, but I can't seem to find a way to do. Can someone please help me out with ...
1
vote
1answer
113 views
32
votes
4answers
6k views

How to find all the local minima/maxima in a range

I want to find : all local maxima in range all local minima in range From those points I can interpolate and combine functions upper and lower boundary. What I am really interested in, is the ...
0
votes
2answers
140 views

How to find intervals in the domain corresponding to intervals in the range?

I want to find the intervals for the argument m1 of this function corresponding to the value for the function lying in given intervals of the range: ...
1
vote
0answers
29 views

Is there any simple way to zoom/magnify a selected portion of a plot (like gnuplot or xmgrace)? [duplicate]

Is there any simple way to zoom a particular portion of a plot (similar to what you can do with gnuplot or xmgrace using the magnifier and selecting a region)? Usually I do it by varying the ...
2
votes
1answer
96 views

Area between Contours in ContourPlot

I feel slightly foolish for asking this because I am so close, but I'm having trouble, so I will anyway. I asked this question two days ago regarding finding the lengths of contours. Now, I'd like to ...
2
votes
1answer
130 views

DynamicModule with Plots and EventHandler

I am making a little animation in Mathematica, along the lines of some of the Wolfram demo projects. I'd like to animate a simulated trajectory of a random process (say a Poisson process), and while ...
4
votes
1answer
131 views

Find lengths of contours in a ContourPlot

I am trying to find the lengths of different contours in the following plot: It is a complicated piecewise function evaluated on the unit disk. I am hoping there is an easy, generalized way to ...
11
votes
2answers
145 views

Rotational Averaging of Image Periodograms (FFTS)

I'm writing a code to do rotational averages of image FFT's. I have a working version but it is pretty slow. Wondering if anyone has any thoughts on a way to do this more efficiently. Data looks ...
3
votes
0answers
43 views

Does the VerticalCallout algorithm in PieChart3D work correctly?

In real world usage you often want to use real world labels with long strings (say 15-20 characters) in 3D pie charts. Here is a toy example : ...
0
votes
1answer
83 views

Infinite expression 1/0.^(1/4) encountered in NDSolve

I am trying to solve very simple system of coupled differential equations using the NDSolve function, but I am getting ...
0
votes
0answers
38 views

Non-Linear Graph [on hold]

I'm trying to fit an Acos^2(theta) graph to the following data: {{295, 1.2}, {255, 1.4}, {235, 1.0}, {195, 0.2}, {155, 0.3}, {135, 0.7}, {95, 1.4}, {75, 1.4}, {45, 0.8}, {15, 0.2}, {15, ...
-1
votes
1answer
66 views

Algebra problem [on hold]

I have recently run into an algebra problem that goes as follows. Using the numbers 1-9 A + B + C + D = EF E + F + G + H = CJ B + G + J = ?D total = B? where ...
0
votes
0answers
38 views

Numeric function not fully evaluating

I'm running into an issue where it seems Mathematica is not fully evaluating the output of my function h[t_]. I included the definition of phi[t_] just to demonstrate that it is a numerically defined ...
22
votes
3answers
3k views

Can Mathematica do symbolic linear algebra?

For instance, is there some way I can say "let A and B be arbitrary real $m\times n$ and $k\times m$ matrices, Simplify[Transpose[Transpose[A].Transpose[B]]]" and ...
1
vote
0answers
42 views

How to determine three last bindings made to a variable when evaluating an expression?

How can I create a list of bindings made to a certain variable when evaluating an expression? I want to determine three bindings made.
1
vote
2answers
56 views

How to plot the product of the NDSolve result and any known function

How can I plot the product of the NDSolve result, e.g. x[t]/.solution and any known function, for instance, ...
2
votes
0answers
35 views

Does the VerticalCallout algorithm in PieChart work correctly?

This manufactured example is typical of many real world cases where we have thin slices of the pie: ...
4
votes
1answer
147 views
0
votes
1answer
27 views

Definite Integral, Piecewise, Error

I am trying to evaluate the following: ...
1
vote
1answer
78 views

Revert y-axis in RegionPlot

I have the following code: ...

15 30 50 per page