# All Questions

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 ...
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 ...
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, ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
152 views

### Delay of events detection dependent of “MouseDown” position

Let's say we have a Rectangle with color which depends of CurrentValue["MouseOver"]: ...
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 ...
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 ...
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 ...
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 ...
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}. ...
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 ...
119 views

### The space in default output of ExportString to Latex

Are there any reasons for converting subscriptbox to Tex with space? ...
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 ...
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 ...
166 views

### Understanding the computation of IntensityCentroid?

If I have an image img, and I ask ComponentMeasurements to return "IntensityValues" for the ...
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 ...
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 $\underset{n\to\infty}{\text{li}}$ ...
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 ...
973 views

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 ...
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 ...
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]] ...
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. ...
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 ...
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 $$\int_1^2 x^2 \, \mathrm{d}x ?$$
1k views

### Mathematica plots a discontinuity in piecewise function that does not exist [duplicate]

I have the following function defined: ...
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, ...
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 ...
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 ...
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 ...
125 views

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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”? ...
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 ...
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 ...
769 views

### Controlling the speed of Manipulate animations exported to SWF

I would like to export in .swf a "Manipulation" output. I am using ...
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 ...
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 ...
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 ...
237 views

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 ...
660 views

### FindRoot Infinite expression 1/0 encountered error

I have 1 equation in 1 variable, which when I use Plot, looks like this: ...
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 ...
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 ...
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 ...
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 ...
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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