2
votes
0answers
53 views
1
vote
0answers
23 views

Fit linear data with weights for y and x in LinearModelFit

I am quite new using Mathematica, I hope someone could give me some help. I have a set of {x, y} data and I have a list of {deltaX, deltaY} standard deviation. I would like to fit my data taking into ...
1
vote
1answer
42 views

Summation notation

I have the current setup for calculating Allan Deviation: which was coded as: Sqrt[Total[Differences[y]^2]/(2 (M - 1))] However, after doing some research, ...
4
votes
1answer
79 views

Reap, Sow with Parallelize: bad performance, why?

I have a question about the performance of Reap and Sow with Parallelize. I am aware of the following questions How to collect result continuously (interruptible calculation) when running parallel ...
4
votes
1answer
45 views

Can I install the Stylesheet from a Mathematica Journal article?

A discussion from 2012 suggested that it should be possible to download an article from the Mathematica Journal and install its stylesheet locally. I can download the .nb file but can not seem to ...
0
votes
0answers
30 views

How to Remove a Specific Element From a List [on hold]

I have a list of elements of which 0 is a member. I want to express this list without any of the 0's. How do I tell Mathematica to remove only the 0's from my list? The 0's can show up more than ...
3
votes
3answers
228 views
0
votes
0answers
35 views

Boxed -> False does not work and I cannot figure out why? [on hold]

I am trying to construct the following graph, but when I add Boxed -> False I still have 2 vertices given. I cannot figure out why. Any help is highly ...
1
vote
1answer
43 views

Emulating Case Pattern replacement

As most regular users, I have developed utility functions complementing the Wolfram language for frequent tasks. In particular, I have variations on Cases (see ...
0
votes
0answers
40 views

Error in FullGraphics V10.1 [duplicate]

Error in FullGraphics. FullGraphics[Plot[Sin[x], {x, 0, 2 Pi}]] Any idea why? Thanks
1
vote
1answer
95 views

Limit of a fractional integral

I am trying to find the limit for λ -> 0 of the integral listed below, but Mathematica give me only a ConditionalExpression ...
0
votes
0answers
27 views

NSolve running for ever

I have troubles running NSolve for my physics problem. I am new to Mathematica, which is why I might be missing some key solutions. I have the following function with the variables: ...
0
votes
0answers
6 views

how to find trigonometric angle of any value? [on hold]

how to find value for this- cot(1.3333) in degrees, without using a calculator? if it is possible please explain the process involved and how to find values of other similar questions.
0
votes
1answer
65 views

How to identify and remove errors in a list

After some searching, I did not find a solution to the following problem, which in my thinking should have some very easy/efficient solution. I'm looking at a list of images (faces), that I want to ...
3
votes
0answers
49 views

How to perform Bayesian optimization with Mathematica?

Does Mathematica have any Bayesian optimization methods for learning hyper-parameters? Practical Bayesian Optimization of Machine Learning Algorithms Jasper Snoek, Hugo Larochelle and Ryan P. ...
0
votes
1answer
83 views

naturalcolor stylesheet not working between linux and windows

I have encountered a weird problem with Mathematica 9. I have it installed on my laptop running Windows 7 and on my work computer now running Debian Wheezy. I am also using dropbox to access my work ...
0
votes
0answers
52 views

Solving Improper Integral [on hold]

I am facing the singularity problem while solving the integral. The integral is improper in the point x1 ...
0
votes
0answers
29 views

Manipulate function as a form of human input [on hold]

I need to streamline a program where one of the lines is essentially Manipulate[f[dataset[a]], {a, min, max}]. I need ...
15
votes
1answer
18k views

How to express trigonometric equation in terms of of given trigonometric function?

How can I express a trigonometric equation / identity in terms of a given trigonometric function? using following trigonometric identities ...
8
votes
3answers
497 views

Create sine function with random increase in phase

I am trying to simulate a signal that randomly increases its phase, so far I have tried two thing but neither worked. I usually use matlab but I want to learn some Mathematica so I thought I would try ...
0
votes
0answers
53 views

Solution Branch Switching of Quartic

Im using a closed form solution for quartic equation. In the quartic equation, there are parameters that are being varied and therefore the solution changes depending on these parameters. The ...
1
vote
1answer
41 views

plot filling using blend and y value

I want to plot say Sin(x) with colorfilling. but I want the colour to be a gradient between white and red. When Abs[sin(x)] is maximum I want white, when its minimum I want the filling to be red. In ...
3
votes
1answer
227 views

Filling using colors rendered corresponding to the difference between two curves

Suppose there are two curves f1[x] and f2[x], and we want to fill the area between them using colors corresponding to the vaule ...
3
votes
1answer
42 views

Reals in Range; unexpected result for non-standard Precision

I think I have encountered advice against using inexact numbers in specifications of ranges and iterator many times. I don't think I ever saw an example of unexpected results though, but today I found ...
2
votes
1answer
124 views

Derivatives of functions with arbitrary number of variables?

I am trying to define a function f[x1,x2,...,xn] with n integer but not specified. And then I would like this funktion to behave ...
1
vote
2answers
81 views

List Operations: how to combine two lists (pattern given)

Two lists (matrixes) are given: a = {{x1, y1}, {x2, y2}, {x3, y3}}; b = {{u1, v1}, {u2, v2}, {u3, v3}}; Expected return: ...
1
vote
1answer
70 views

Dealing Repeated pattern in StringReplace

A problem about StringReplace When I'm running into this problem possible [bug] ...
0
votes
1answer
47 views

Want to display a animation necklace when updating a list of suggestions from an inputfield search

I have an InputField search that provides search suggestions, but I want an animation necklace to be displayed while the search is 'busy'. I would also like this to be done using Dynamic rather than ...
1
vote
1answer
77 views

Transform linear system into a matrix form

I have a system of linear equations in variables $A_n$ of form: $$ \sum _{k=-K}^K h_k A_{n-k} J_{n-k}\left(\frac{(1-i) \text{$\eta $Sqrt}(n-k)}{\sqrt{2}}\right)+A_n\left(\frac{(1-i) \eta ...
0
votes
0answers
32 views

DateListPlot not showing any ticks

With a vector dates (in DateList format), and a vector data that has the same length as ...
1
vote
1answer
57 views

Switching to CloudObject`Private`

I shut Mathematica done, then restart it. The image shows all that I do. I have done nothing else. Can anyone explain what is happening to me? The complete code is: ...
3
votes
2answers
217 views

Bessel derivatives

I tried to expand BesselJ[k,x] function into a Taylor series with Series command. Here both ...
3
votes
0answers
62 views

Detect touching particles in image

I have a picture of glas spheres. I want to calculate different properties of these spheres such as circularity, size and count them. I have managed to fill the white centers of the particles to ...
1
vote
0answers
157 views

What summations can Mathematica do? [closed]

I was very pleased to discover that Mathematica could do this summation and produce a symbolic result. ...
15
votes
3answers
2k views

Relative paths for portable notebooks in Mathematica

I cannot find how to use relative paths in Mathematica. My directory structure is simple. ...
0
votes
0answers
26 views

Multivariable Integrate [on hold]

Why won't Integrate[r^3, {r, 0, a - a/b z}, {z, 0, b}] work? The integral symbol method works though:
1
vote
2answers
63 views

Plotting NIntegrate

Plot[E^(-0.5 x) NIntegrate[Cos[t] E^(Cos[t] + 0.5 t), {t, 0, x}], {x, 0, 40}] Mathematica evaluates this integral for each point, which takes a long time. It is ...
0
votes
0answers
20 views

Insert Citation dialog comes up empty

I'm using Mathematica 10 with Endnote X5 on Windows 7. When I click on "Insert> Citation> Bibliographic Reference" command (while the cursor in Mathematica is in 'text' style mode, Alt+7) Endnote ...
3
votes
1answer
238 views

Principal Components - how to obtain linear transformations?

I have a list "xlsf" with 6 columns and 1200 rows for PCA analysis. The PrincipalComponents[xlsf] gives the following: "The principal components of matrix are ...
2
votes
1answer
100 views

Numerical evaluation of ChebyshevT

When I evaluate the following Chebyshev series of the first kind in two different ways, I get two very different results: ...
23
votes
3answers
2k views

Standard errors for maximum likelihood estimates in FindDistributionParameters

I am trying to fit a non-standard PDF to data and FindDistributionParameters works great, and gives me the parameters of the distribution back using maximum ...
0
votes
0answers
15 views

Problem of importing some special characters in HTML

content of the html file is as follows: <p> 被尊称为&ldquo;高贵的&rdquo; </p> method1: ...
1
vote
2answers
212 views
0
votes
0answers
53 views

Asymptotic forms of Bessel function

I want to replace Bessel functions by asymptotic forms, so the question is: can I find the best ones with help of Mathematica? And if it's possible, how can I do it? Update How can I get with ...
0
votes
0answers
135 views

Optimization method L-BFGS-B

I am comparing a result of optimization using R and Mathematica. Mathematica (NMaximize) has found a significantly better (global optimum) result then R (using ...
0
votes
0answers
37 views

All contours aren't shown in ListContourPlot

I want to plot the contours of a data set which when plotting in 3D looks like this: When I plot the contours as ...
3
votes
0answers
165 views

Nonlinear FEM and FindRoot

I'm trying to develop a kind of nonlinear FEM application using mathematica to solve a bvp like the following: $$ \gamma(u') ~u^{iv} + 2 \gamma'(u') u''' u''+ u''^3 = f(x) $$ where $u = ...
1
vote
1answer
86 views

Is there a LogBeta function like the LogGamma?

In a computation, I need Log[Beta[alpha+j,beta-j+n]] of some kind. Is there a LogBeta function built-in to avoid any under/over ...

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