2
votes
2answers
225 views

How can I merge multiple sets of morphological components (perhaps selected using different metrics)?

Let's say I use SelectComponents to select morphological components in an image according to some criterion, like "Elongation". Then let's say, I pull out a ...
2
votes
1answer
117 views

Function to differentiate between date pattern and specific string format

I'd like to write a function that behaves one way when the argument is a Mathematica date, such as {2013,12,15}, or with added hours, minutes and seconds if ...
2
votes
4answers
1k views

System Modeler can't find g++ in Mac OS X Mavericks

I've just purchased SystemModeler (Mac OS X Mavericks) but can't verify the g++ compiler path. I assume it's in the Xcode package but nothing I've tried seems to work, for example, ...
2
votes
2answers
612 views

Locator to show coordinates of plot

Old I would like to make the locator follow a plot, giving the coordinates as it moves. I don't really know where to start with this one, but I would like the dynamic plot to look something like ...
2
votes
1answer
217 views

How to make an efficient difference of sets function?

How to write a nice code that removes all elements from given set A, that occur also in set B? I would like to use DeleteCases[] for this purpose, but have no good ...
2
votes
2answers
404 views

Finding maximal sublist of linearly independent vectors

Given a list of vectors v = {v1, ..., vn}, which is the fastest way to find a maximal sublist of linearly independent vectors? I could add the vectors one by one to ...
2
votes
4answers
247 views

Given an implicit solution, how to plot transformation of this implicit solution?

I have a function, which gives an implicit solution of a variable $y$ as a function of $x$. Moreover, I have a function $f$ which depends on $y$. How to plot a ratio of $f/y$, given that $y$ is only ...
2
votes
1answer
7k views

Plot points, line and plane in one 3D plot [closed]

What's the easier way to plot these coincidently in 3D: ● The plane $5x - 4y - 9z = 0$ ● Parametric line $x = t, y = t/2, z = t/3$ ● Two points: $(0, 0, 0), (1, -1, 1)$ ? Moreover, how can I pick ...
2
votes
2answers
231 views

Transform Piecewise[] into sum of indicators

I'm interested in transforming a piecewise defined function into a sum of indicator functions, ultimately with the aim to be better able to integrate them. As an example I would like to transform the ...
2
votes
1answer
152 views

Delay of events detection dependent of “MouseDown” position

Let's say we have a Rectangle with color which depends of CurrentValue["MouseOver"]: ...
2
votes
1answer
155 views

How to embed graphic-element-specific metadata within a Graphics object?

One of the most crucial requirements for rich, interactive scientific graphics is being able to "annotate" individual graphic elements (e.g. the data points of a scatterplot, the individual curves in ...
2
votes
1answer
93 views

Constrain movement of Locator

Continuing the discussion started in the thread here, I've tried to recreate the code from scratch. I thus looked to constrain the movement of a locator to the graph defined by ...
2
votes
1answer
129 views

How to define a function of z[bar], etc

Using Displaying index as subscript on output: e.g. C[i] -> C_i with Notation[...] or Interpretation[..]? I have often ended up wanting to define functions of annotated variables to better match my ...
2
votes
2answers
217 views

Reducing quality of Graphics3D scene to improve performance?

ProteinData["SERPINA1", "MoleculePlot"] gives the detailed Graphics3D plot below. I'd like to make many small copies of this ...
2
votes
1answer
180 views

Plot above desired region

I would like to plot a real-valued function $f$ of two real variables $x,y$ but only over the region of the $x$-$y$ plane satisfying \begin{align} x>0, \qquad -x^{3/2} < y < x^{3/2}. ...
2
votes
1answer
254 views

Manipulate executes expressions multiple times

I am using Manipulate for a rather intricate front end for data visualization. I was getting very sluggish performance and was able to boil the problem down to a ...
2
votes
1answer
119 views

The space in default output of `ExportString` to Latex

Are there any reasons for converting subscriptbox to Tex with space? ...
2
votes
1answer
312 views

Demonstrate aliasing effect in sound

I'm trying to demonstrate the aliasing effect using sound, that is, when the sample rate is fixed and the sound frequency is increased, we would hear the sound pitch go down when we pass the Nyquist ...
2
votes
3answers
145 views

Accessing temporary value of a Nest evaluation

The function Nest[] must store the temporary values in the memory somewhere (those values that would form the entries of the list which is returned by the ...
2
votes
1answer
166 views

Understanding the computation of IntensityCentroid?

If I have an image img, and I ask ComponentMeasurements to return "IntensityValues" for the ...
2
votes
3answers
2k views

How to color a contour plot over a subset of colors displayed in the bar legend

This seems real easy but I can't find the answer. I have a few contour plots that I am combining and want to use only one bar legend that captures all the values. Given that I know the range of ...
2
votes
1answer
747 views

How to make underscript like underscript in InlineFormula of lim in Notebook and (inline)Latex

This question maybe a little tiny. Firstly, Let's input underscript Ctrl+4 in an inline cell. InlineFormula inline cell $\underset{n\to\infty}{\text{li}}$ ...
2
votes
1answer
653 views

ItoProcess function

While looking in the help manual of Mathematica concerning the ItoProcess function I found the following: ItoProcess[{a,b,c},x,t]: represents an Ito Process y(t)=c(t,x(t)), where ...
2
votes
1answer
973 views

Excel DDE Link: reading and writing in real time

I'm wondering if it is possible to link Excel and Mathematica in real time, so that Mathematica can be used as a computing and "storage" tool. Suppose I have an Excel spreadsheet with an active DDE ...
2
votes
1answer
515 views

How do I sort complex numbers?

Okay, so I posted something about sorting, and it was linked as a duplicate to This post However, I am having problems trying to sort a list that contains both real and complex numbers. I put them ...
2
votes
3answers
2k views

Solve and plot an equation that is dependent on a transcendental equation

I am trying to plot a function that uses the values of a transcendental equation as its input values: y = Tanh[(2 y + x)/2.5] z = 2.5 * Log[2*Cosh[(2 y + x)/2.5]] ...
2
votes
4answers
2k views

How can I create a list of functions?

Can anyone tell me, how to create a list of functions? I've tried the following code, but it doesn't work. ...
2
votes
2answers
444 views

Count and plot the number of solutions in an interval

I have equations depending on one or more parameters and I want to find and plot regions in the parameter space in which there is a specific number of solutions. For definiteness let's consider a ...
2
votes
1answer
192 views

How to convert the symbol $d$ in Integrate into $\mathrm{d}$?

I used TeXForm[HoldForm[Integrate[x^2, {x, 1, 2}]]] to convert the integral $$\int_1^2 x^2 \, dx$$ How to get $$\int_1^2 x^2 \, \mathrm{d}x ?$$
2
votes
1answer
1k views
2
votes
1answer
153 views

How can I place gui controls inside Grid? [duplicate]

In all my apps, I am facing a problem about placing the Gui controls inside Grid. For this purpose, I wrote three functions. The first function, ...
2
votes
2answers
662 views

How to expand a general expression in cross and dot product in Mathematica

I am looking for a way to simply the general expression in cross product and dot product with general vectors. I got a help in How do I simplify a vector expression? but soon I find that it doesn't ...
2
votes
2answers
202 views

What is the maximum real value for Compile?

Can one be found programmatically? The function I'm compiling, indicesOfMin, gives the indices of the minimum value(s) of a real-valued list, the parameter, in a ...
2
votes
1answer
161 views

Rookie mistake in defining a function with Modules?

I can't figure out what's wrong with this piece of code. I'm trying to define a function that counts the occurrences of x, y and ...
2
votes
2answers
886 views

Making a movie with specific frame-rate out of ListPlot outputs? [duplicate]

Possible Duplicate: Is it possible to prerender animation in Wolfram Mathematica? Does Mathematica support variable frame rate for any video format, in analogue of GIF-style “DisplayDurations”? ...
2
votes
3answers
218 views

how can I generate a sequence of assignments?

I want to make a sequence like follows r[1]= r[2]= r[3]= r[4]= .... r[n]= The above r[i] represents coordinates which I have ...
2
votes
3answers
280 views

How do I construct a pure function to extract data fields from records that are strings?

How can I get from data segment format to the final segment format with a pure function? The data fields are fixed length. There are no separators between the fields. a) list ...
2
votes
2answers
769 views

Controlling the speed of Manipulate animations exported to SWF

I would like to export in .swf a "Manipulation" output. I am using ...
2
votes
2answers
501 views

Export grayscale png

The help for the Export function is absolutely unclear. How can I specify options for my output format? According to the documentation, PNG supports grayscale ...
2
votes
2answers
2k views

How to change the base of logarithmic-scale plots?

Mathematica provides a score of convenient functions to make plots with various logarithmic scale axes, for instance I am using ListLogLinearPlot to have a discrete ...
2
votes
2answers
1k views

Why doesn't Mathematica solve $x=\cos\,x$ properly? [duplicate]

Why doesn't Mathematica solve x == Cos[x] properly? Both Solve and NSolve fail with the ...
2
votes
0answers
237 views

Best Practice for using Notation, $Pre, MakeExpression in a package

I'm setting up a package that defines a custom Notation. I'd like to inquire about best practices and possible issues of: using the Notation Package using $Pre ...
2
votes
2answers
353 views

Combining lists with common elements efficiently [duplicate]

Possible Duplicate: Computing the equivalence classes of the symmetric transitive closure of a relation I am required to process sets consisting of 2-element subsets of integers by ...
2
votes
1answer
660 views

FindRoot Infinite expression 1/0 encountered error

I have 1 equation in 1 variable, which when I use Plot, looks like this: ...
2
votes
2answers
249 views

Evaluation of Notebook chosen by FileNameSetter

Please consider the following: I have created a GUI where I can choose the path of a notebook (which I need for later calculation) via ...
2
votes
1answer
477 views

Manipulating an arbitrary-precision ContourPlot

I have a function, say minimizeme[ω_][β_][ϵ_] = ϵ^2 ω-Log[2 (Cosh[2 β]+Cosh[2 β ϵ])]/(2 β); I want to make a high-precision dynamic ...
2
votes
1answer
2k views

Function output from DSolve

I want to get a function as output form DSolve. For Example : sol = DSolve[{Q''[t] + 40 Q'[t] + 625 Q[t] == 100*Cos[10*t], Q[0] == 0, Q'[0] == 0}, Q[t], t] I ...
2
votes
1answer
190 views

Server running WolframLightWeightGrid manager loses licensing information

"Once more into the breach..," I have 2 identical Xserves running OS X Server 10.6.8 each with 2 quad core Intel Xenon processors a total of 16 kernels. I have configured both servers identically ...
1
vote
0answers
83 views

How to trigger Emacs to open a file from Mathematica? [duplicate]

I thought Run will do the trick: Run["emacs -q " <> myfile] Run["! emacs -q " <> myfile] But it does not! I'm ...

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