0
votes
1answer
251 views

Image convolution, motion blur

I define my degradation function as $$H(x,y;a,b,t)=\frac{T}{z}\sin z~e^{-jz}$$ where $$z=\pi(ax+by)$$ So I write ...
1
vote
3answers
198 views

Plot a table of ranges

I have table with values like: t = {1.234 <= a <= 2.345, 3.42 <= a <= 5.67, ...} and I want to plot this table, the ...
0
votes
1answer
177 views

How to build an interface that plots an equation given as text by a user?

I would like to create a window where a student may enter an equation and, by clicking on a button, the function gets plotted. In the original Spanish: Quiero realizar una ventana en la cual el ...
3
votes
1answer
272 views

Nicely illustrating the evolution and end-state of a discrete-time Markov chain

I'm simulating a discrete time Markov process on a finite state space corresponding to a linear interval $(x_1, x_2, ..., x_N) \in X$, where each time step $t_i$ involves updating the state of some ...
8
votes
2answers
314 views

Understanding Villegas-Gayley

Temporary message: I have written another question about the behaviour the code by Oleksandr R. . Sadly I clicked "discard" and that was lost. I am a bit demotivated now and in order to not let the ...
2
votes
0answers
104 views

Want explanation of when different looping constructs are appropriate [duplicate]

For example when would you use a Do loop over a For loop? For which tasks would you use Map, ...
3
votes
1answer
467 views

Specific Mathematica algorithms, for example LU Decomposition

Where I can find detailed information on algorithms used by Mathematica, especially for numerical methods. The Manual doesn't seem to iclude specifics in most cases. For example I get a different LU ...
10
votes
0answers
286 views

Create a new infix operator [duplicate]

It is well known that the infix operator @@ is used as a short form of Apply. For example, both ...
0
votes
2answers
164 views

Any other way to get a better FindFit for my data besides good initial parameters?

I fit some data with FindFit and NonlinearModelFit with some constraints and I am not getting a good fit with my data. I read ...
0
votes
1answer
94 views

How to convert the expression '{a->a0, b->b0}' to the expression 'a=a0; b=b0'? [duplicate]

How to convert the expression '{a->a0, b->b0}' to the expression 'a=a0; b=b0'? I think this is a common question and do not know if someone has asked it before. Any help or suggestion will be ...
35
votes
2answers
2k views

Benchmarking Mathematica performance on the Raspberry Pi

It is not surprising that Mathematica on the Raspberry Pi is slow and clunky. In Stephen Wolfram's words, the command line is "quite zippy" but the notebook interface is "a trifle sluggish by modern ...
1
vote
1answer
300 views

Curve fitting data to model

Example Assumptions: ...
1
vote
1answer
122 views

How do I convert Mathematica's suggestions to usable code

I enter an image and in the suggestions bar under the image, one of the suggestions is "Edge detect". I click on it and a nice cell with all the options comes up. How do I get the code for all of what ...
2
votes
4answers
427 views

Estimating a distribution using binned data

I have data from which information has been irretrievably lost through binning and I am trying to find a plausible distribution from which it derives. There is an academic paper suggesting that the ...
2
votes
1answer
152 views

Filling between quantile ranges

Following code plots Quantiles for a GBM process. ...
3
votes
2answers
176 views

Solve-ing with initially unassigned parameters and Solve-ing using their numerical values produces different results

I am trying to solve an equation using the following piece of code: ...
2
votes
0answers
125 views

how to calculate with just double floating point precision [duplicate]

I want to calculate with simple double floating point precision. ...
5
votes
2answers
210 views

Triple fractional part-related integral

The evaluation with Maple suggests the triple integral is around $1$, but Mathematica tells it's $0.0958758$. When using the code ...
2
votes
2answers
149 views

How to exclude numbers in a series and still plot the graph? [duplicate]

I want to plot this: $\displaystyle\sum_{n=-{10}\atop n\ne \pm 1}^{10} \dfrac {4i(-1)^{n}n}{(n^2 - 1)^2}e^{inx}$ but have no idea how I can exclude the cases for when $ n = \pm 1 $. I don't wish to ...
0
votes
1answer
161 views

How to replace characters which have alternate meanings in strings. This code works, but creates errors

The Problem: I often paste strings into Mathca which have many what I call "extender characters" --which may extend the character set." We know these have to be dealt with so Mathca can deal with ...
0
votes
3answers
143 views

Mathematica plotting help (plotting a complex fourier series). [duplicate]

How would I plot the following in Mathematica? $ \displaystyle\sum_{n=2}^{10} \bigg(\dfrac {4ine^{inx}(-1)^n}{(n^2 - 1)^2} - \dfrac{4in e^{-inx}(-1)^n}{(n^2 - 1)^2} \bigg) $ Thanks.
2
votes
2answers
211 views

Change Header By Page

I would like to display the following header on of each page of an exported pdf specificTitle XXX XXX should be the ...
6
votes
1answer
109 views

Why can Format be used on the left side?

I am learning Mathematica in random order by reading its documentation. This approach is what I like most when learning new things. Consider the following 2 cases. Syntax A: ...
3
votes
0answers
51 views

Precedence of defined functions [duplicate]

When I define functions in Mathematica like: f[x_] := 3 f[x_Integer] := 6 How is the value of f[6] determined? It seems to ...
5
votes
0answers
321 views

How to extract structured array data from DefineDLLFunction in Mathematica

I want to use my Bluechip PCI-ADC acquisition card in Mathematica via his dynamic link library “Bcdll32.dll”; (used to access functions on my PCI data acquisition cards). My problem is the function ...
1
vote
1answer
234 views

Looking for better way of plotting families of functions

I'm trying to plot this: ...
4
votes
0answers
168 views

DynamicModule, SaveDefinitions and global functions

Unfortunately, I had not checked stackoverflow, because there, the exact same behavior was already reported. Please see the Q&A "SaveDefinitions considered dangerous". Up-front, I'm on Ubuntu ...
4
votes
1answer
213 views

What does it mean when a function is defined with two pairs of brackets

I have noticed a function defined as such: f[x_][y_] := expr; How is the argument y in 2nd pair of brackets being used? What is the difference from defining a ...
0
votes
0answers
113 views

Heavy duty operations, RAM, and Readyboost

I occasionally work with large 3D arrays and found that with calculations that take a long time, Mathematica completely fills my available RAM (6056 MB minus other active operations [mostly svchost]), ...
1
vote
0answers
64 views

Need to take infinite sum of residues, is there a way to choose the order of operations for ReleaseHold?

I'm computing an infinite sum of residues. I want to do something like this: ...
3
votes
2answers
230 views

Finding positions of multiple elements in lists

I realise that Position[{2, 4, 8, 16, 32, 64}, 4] will return {{2}} I would like to do something like this: ...
1
vote
1answer
93 views

How to convert each pair of { and } into ( and )? [duplicate]

I am a learn-by-example person. I have no idea to change every { and } to ( and ...
1
vote
1answer
346 views

How to convert the following list into a LaTeX table?

How to convert the output of the following code In[43]:= Func[x_]:=Select[Range[x],Total[IntegerDigits[#]^3]==#&]; Func[1000] which is Out[44]= ...
3
votes
2answers
142 views

Checking whether a number can be composed from the cube of its digit

How to check whether or not the sum of the cube of each digit of a number is equal to the number itself? In the following code, I tried to return the number in question whenever it matches the ...
0
votes
0answers
54 views

Interrupting FactorInteger automatically when it takes a very long time [duplicate]

Sometimes when I use FactorInteger[] with certain very big integers, it takes a very long time, and I have to interrupt the operation manually to try another ...
2
votes
1answer
154 views

Is it possible to take data from external database for the CDF embedded in webpage?

I have embedded my CDF in facebook.The data for the CDF should be taken from facebook server or my server dynamically.I tried out but its not working in dynamic code iam not able to access the data at ...
2
votes
3answers
154 views

How to generate a series of bisection points of a given line segment?

I want to get the coordinates of the bisection points for a given line segment to a specified resolution. For example, when the line is given by {0,0} and {1,0}, the output coordinates should be ...
3
votes
0answers
176 views

How copy a large cell into clipboard using `input text`?

This is a strange problem and everything I tried did not work. I have a very large single Manipulate cell (it is a demonstration stylesheet notebook, hence this cell have to be one), and I simply ...
10
votes
10answers
699 views

Finding neighbors from list

Say you are given the following list: list={{3, 2, 1}, {3, 4, 2}, {2, 4, 1}, {1, 4, 3}}; Two numbers $x,y$, not necessarily distinct, are neighbors if one of the ...
2
votes
1answer
217 views

Java Heap Space Error on data insertion over SQL Server

I'm trying to insert 2-milliion lines into a SQL Database, and get this error: JDBC::error: Java heap space The insert is a standart Mathematica SQL statement: ...
1
vote
1answer
255 views

How Manipulating a matrix and a graphic in only one Manipulate? [closed]

I have to manipulate a matrix and graphics in one big Manipulate-Block. This way: Manipulate[Matrixform[mat],Graphics3D[]] How can I achieve that? Ok, here my ...
0
votes
0answers
103 views

Netlink interface for arduino - led blink example implementation

I'm trying to learn of how I can use netlink in Mathematica to communicate with arduino. So question is the following: Can some one that has such experience in programming arduino using netlink in ...
0
votes
1answer
110 views
5
votes
1answer
177 views

Problem to plot GDP data coming from Wolfram Alpha

I'm working with economic data and realized that I could extract it directly from WolframAlpha using _Mathematica. So I did it. I extracted the GDP data of the country I'm studying. ...
5
votes
1answer
97 views
12
votes
5answers
807 views

Measuring the percentage of a given color in an area?

Given this image I would like to measure how much (in percentage relative to the square area) of each black delimited square is filled with green: ...
1
vote
2answers
327 views

Equating coefficients in a non-power-series equation

How can I use Mathematica to equate coefficients in a non-power-series equation? For example, I would like to take an equation like the following: ...
0
votes
2answers
331 views

Projecting curves of intersection onto a plane

Referring to this page, Plotting implicitly-defined space curves How can I project the curves of intersection onto the x-y plane?
10
votes
1answer
1k views

Output from Wolfram language in Python

I have a Python program which will run a script in the Wolfram language and then return to the main program. Is it possible to return values/variables to the main program? This is the code in Python ...
1
vote
0answers
90 views

Compiled version of user-defined function

I have a function for parameter estimation with these codes: ...

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