2
votes
4answers
117 views

ListPlot and filling between curves

I have a simple question. Why is Filling not working in the following? ...
3
votes
1answer
43 views

Using patterns to modify TeXForm output

When I use TeXForm on a matrix I often want to replace some the output with some number of verticle and horizontal lines. Is there a way to get control over this, possibly using patterns? As an ...
5
votes
0answers
73 views

Enforce graph symmetry

I am using ...
11
votes
2answers
400 views

How to speed up Colorize

I have a list of about 500 images similar to the following: A = Import["http://i.stack.imgur.com/1bV4O.png"] ...
3
votes
1answer
92 views

Roots of Whittaker W function

I am interested in finding the roots $u$ of the equation $$ W_{1,\imath b}(a)=0, $$ where $W_{\kappa,\mu}(z)$ denotes the Whittaker $W$ function, $a>0$ is a fixed parameter, $\imath=\sqrt{-1}$ and ...
0
votes
0answers
29 views

Set precision on output dataset [on hold]

How do I set the output precision such that if a value is calculated to be e.g. 9.7942*10^-18, Mathematica doesn't output that value, but it just outputs $0$ instead. I tried ...
0
votes
0answers
70 views

NDSolve and assuming

I am trying to solve the system of PDE with NDSolve and I got an error message like this NDSolve::deqn: "Equation or list of equations expected instead of ...
0
votes
1answer
65 views

Scaling vectors in an animated vector field [duplicate]

I want to animate a VectorPlot3D. But, Mathematica rescales the vectors in every frame. Can you scale them all to one fix point? For example, scale the vectors on ...
7
votes
2answers
205 views

Why does Mathematica say $\int_0^1\int_0^1\int_0^1\frac{1.0}{xyz}\,dz\,dy\,dx=0$?

Mathematica 9 says that $\int_0^1\int_0^1\int_0^1\frac{1.0}{xyz}\,dz\,dy\,dx=0$ and $\int_0^1\int_0^1\int_0^1\frac{1}{xyz}\,dz\,dy\,dx=0$. ...
0
votes
0answers
28 views

Expected value of exponential random variable [migrated]

If an exponential random variable, X, has failure rate λ, what is E[X|X<λ]? I'm not sure how to start here. I know that E[X] = 1 / λ for an exponential random variable. Is the probability that X ...
-1
votes
0answers
34 views

Boolean function conversion to operators(AND,NEGATION) [on hold]

Given some boolean fuction f, how can i convert it into an expression that has only the operators: && and Negation.
1
vote
1answer
42 views

When plot a list, how to Manipulate a sequence of defined functions at the same time?

I am trying to plot a sequence of functions, for example{(a+b)^i},{i,1,100}. All the expressions I have stored in the list. Now I want to plot them and see how their value would change if I change ...
1
vote
1answer
45 views

Unexpected behavior of WhenEvent in NDSolve?

In Mathematica 9.0.1, here is a simple code to numerically solve an initial-value problem: ...
-3
votes
0answers
28 views

Recursion with an exception [duplicate]

I need to print the first 7 members of the sequence a[n] with its reccurence formula a[n+1]=7*a[n]+n, where a[1]=1 and the digit 7 dosnt occur.
3
votes
1answer
148 views

Finding peaks of data

I want to find peaks in my data. My code in a reduced form so far: ...
0
votes
1answer
46 views

Problem with 'time dependent' functions [on hold]

I'm just trying to make $\frac{dx}{dt}$ where $x= \rho \cos\theta \sin\phi$ where $\theta, \phi $ and $\rho$ are time dependent functions. ...
0
votes
0answers
50 views

Which method to use for finding maximum without actually computing optimization function explicitly?

I am new to Mathematica and I am currently working on an optimization problem. The optimization function that I have easy to calculate for some assignment of variable but it is very difficult to ...
3
votes
3answers
70 views

Minimizing Multiple Functions

I'm trying to write a script that will minimize a given set of functions. The homework problem I've been given lists a set of dietary information, and I'm supposed to build the optimal salad based on ...
0
votes
1answer
52 views

Permutation with a condition [duplicate]

I need to create a set A={“a”, “b”, “c”, “d” “e”} and print all the permutations of the set with lenght 3 that satisfy the condition:element "a" has to be ahead of "c" and "d" has to occur atleas ...
0
votes
1answer
56 views

Problem using NDSolveValue

Good afternoon, fellas. Could anyone here help me solve this problem? ...
1
vote
0answers
29 views

Simplification with absolute value

I have a long expression that has absolute values in the exponent. Some parts of the expression would clearly simplify if one assumes that the power is an odd or even integer. When I give one of this ...
0
votes
1answer
59 views

How to shorten/simplify my plotting code

Is there a way to simplify and shorten my code? ...
0
votes
0answers
87 views

Plotting a numerical integration

I have the following code to calculate a numerical integral for any given a: ...
1
vote
1answer
39 views

InfiniteLine Woes [on hold]

I am puzzled that the InfiniteLine below intersects with only one of the two points. ...
0
votes
0answers
38 views

Solve an integral equation: to fit the given data with an integral of two functions?

I am trying to find an efficient way to solve the following equation $$h\left(b\right)=\int_{0}^{b}f\left(\frac{b-c}{1-c}\right)\frac{g\left(c\right)}{1-c}dc$$ where for $h(b)$ I have the data ...
0
votes
0answers
43 views

How can I make rows into columns? [on hold]

I want create new columns and rows from the following list of data using Mathematica: {{11, 12, 13}, {21, 22, 23}, {31, 32, 33}} I want the new for be like this: ...
3
votes
1answer
156 views

I want to construct a function than the output is “Sequence”

For example if the input is x and x<10 the output is Sequence[x,0],if x>10 the output is Sequence[0,x] but obviously ...
2
votes
1answer
47 views

Problem with plotting data (.csv)

I have a problem with plotting the data of a recent experiment. I'm quite new to Mathematica, but searched the documentation and forums without solving my issue. My data is stored in a .csv document, ...
-1
votes
1answer
58 views

Module whose input is a function of 2 variables [on hold]

I need to make a Module whose input is a function of 2 variables and 2 variables m,n so i can make a Matrix with Array. Basicaly, I need this: ...
0
votes
0answers
75 views

Finding the numerical solution to a polynomial of a high degree [on hold]

I would like to numerically solve the following equation for ρ and use the obtained values of ρ to calculate the values of VR ...
0
votes
2answers
68 views

Plot ParametricNDSolve

I am trying to plot the probability of a molecule being in a certain state via the numerical solution of the Schrödinger's equation of molecule in an oscillating electric field (in a rotating system). ...
0
votes
0answers
37 views

How to find points of the external cut of a segment by a nonconvex polyhedron [on hold]

It gives me empty {} when I'm trying to Solve[..]. What's wrong? ...
1
vote
1answer
86 views

Equation solution using minimization

I have an equation F[x,y]=0. I need to plot y as a function of x. Due to the properties of ...
5
votes
1answer
181 views

Find exponential generating function from the first few terms

The function FindGeneratingFunction computes the ordinary generating function of a sequence, given a sufficient number of initial terms. I have two questions in ...
0
votes
0answers
22 views

To make a list from a For Loop [duplicate]

I have been working on a for loop and generating around 2500 integers from that. Now I am interested in calculating the Max or Min of those numbers. How to create the list of those numbers? So that ...
1
vote
0answers
43 views

Reordering numerically calculated eigenvalues assuming smooth dependence on a parameter

As was discussed in a different question here on SE (link) if you compute eigenvalues numerically of a matrix which depends on a parameter y, the resulting plot of ...
0
votes
0answers
26 views

Structure of the output of a DynamicModule [on hold]

I have a DynamicModule function which is used in a recursive function built with patterns. In order to understand how the recursive function works, I need to know ...
6
votes
4answers
142 views

How to eliminate variables when using Solve[]

In certain problems, we need to solve systems of equations and get results in terms of just selected variables. For example, how could we solve eqn==0 below for ...
0
votes
1answer
64 views

Are there any open source projects related to signal processing

I am going to make a program related to audio signal processing . Are there any open source projects related to it?
6
votes
1answer
227 views

Compiling a function that takes lots of optional arguments

I have a function that takes lots of optional arguments (basically some design parameters, about 10 of them) and performs some basic algebraic calculations involving complex numbers with the options. ...
0
votes
0answers
40 views

Multidimensional integration does not work

I am trying to solve an integral over Cubic Birillioun Zone, but after taking a long time Mathematica give nothing in return and just repeating the integral form, here is my integral, ...
0
votes
0answers
42 views

How to calculate frequency from waveform? [closed]

How to calculate frequency from waveform in mathematica??? Voltage waveform is shown below. ...
0
votes
0answers
30 views

How to draw a revolute joint and Prismatic joint? [closed]

and I want to add a bar on the surface of the blue cubiod so that I can move the joint with the bar. Also it's best to add a function code(a code to describe how it moves)
8
votes
1answer
196 views

Why is `Block` significantly faster than `ReplaceAll` for inputting variable values

Given that the documentation for FindMinimum uses ReplaceAll for its various examples of what to do with the found solution to ...
2
votes
0answers
48 views

How can I fit the parameters describing a given 3D object such that its projected shape best matches the silhouette observed from a given location?

[I'm reposing my previous question to make it clearer]. I have data which are the longitudes (l) and latitudes (b) for the vertices of the edges of a shape as it appears to an observer at a given ...
0
votes
0answers
35 views

Handling *.in and *.out files

im trying to use Mathematica in solving of algorithm tasks like this one: http://poj.org/problem?id=1274 When i was doing those in c/c++ i was able to easily pass input/output in Windows command line ...
1
vote
0answers
56 views

Optimizing orthogonal nonlinear regression code

I'm doing a simulation problem on the Langmuir adsorption model, where I need to obtain the model parameters from simulated data using the orthogonal nonlinear least-squares regression method. Here is ...
2
votes
1answer
87 views

How can I run a summation numerous times?

I have been working on code for finding the Allan plot of generated white noise, however, I cannot figure out a way to automate it for a different range of numbers. My code is as follows: ...
1
vote
4answers
86 views

How find constant term of quadratic with square already completed?

Suppose I have a quadratic polynomial in two variables x and y in which the squares with respect to ...
2
votes
1answer
22 views

Print to console bis

In the answer to this question, one explains how to use a function PrintToConsole[...] to print output to the console. My question: can you make a global definition that will automatically ...

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