# All Questions

191 views

### Generating a list of cubefree numbers

I am trying to generate a list of cubefree numbers (i.e. numbers when prime factorized contain no tripled factors) within a given range. Of DivisorSigma, ...
123 views

### Why is NMinimize trying to evaluate my function analytically instead of numerically?

I have been having some trouble with NMinimize. I am trying NMinimize[f[x], x] where f is ...
108 views

### Exporting a Table of Graphics into Individual Files [duplicate]

The command Table[Polt[Sin[k x],{x,1,10}],{k,1,30}] generates a list of graphics. I want to export each list item as an individual jpg file, named according to ...
69 views

### Decapitating “explicit” and “implicit” heads

This is a follow up to this question. So far, I named "explicit" heads to those that appear explicitly in the expression. For example, f[x] has an explicit head. I ...
159 views

### Add Brackets to a string list

Hello stackexchange community! I have a stringlist with a value and his error for eg: {{"12","1"},{"13","2"}} Now i want to output this as something like this ...
146 views

### Show multiple plots with single variable

Using the same example code as in this question, is it possible to show all 10 plots (ie, each step of the manipulation) simultaneously? If a manipulate function is a series of listplots based on a ...
67 views

### NotebookWrite Cell with Grid

I'd like to NotebookWrite a Cell in StandardForm with a ...
94 views

### Replacement variable in list plot

I would like the replacement: /. {ComplexInfinity -> 0} to be treated as a variable. I am trying to overlay the following list plots: ...
132 views

### Passing a joined list of symbols for Module or Block to treat as its own local symbols

The Question I'd like to write a function which itself takes a list of symbols, e.g. Foo[{x, y, z}] to pass to Module ...
106 views

### Two-way locator & slider controls

I was wondering whether it was possible to have a two way control system, whereby one could click and drag both the locator (which would in turn move the sliders), AND click & drag the sliders ...
173 views

### Split Lingustic(IPA) at Words Unique Sounds

How might I split a word at each IPA of each unique sound. For example {"pray", "wade"} (* {{"p","r","ˈeɪ"}, {"w","ˈeɪ","d"}} *) ssch answered a question here ...
120 views

### Convolution of a denstity function having a point mass with itself

My density function is as follows: ...
627 views

### How to assign (and retrieve) variables with subscripts? [duplicate]

I like to give subscripts to my variable names when the variables are related. I.e., Subscript[r, i] = 3 3 A problem arises when I later assign ...
153 views

### Using ParametricNDSolveValue with initial conditions of another ParametricNDSolveValue

I have a system of parameter-dependent ODEs, which I can solve using ParametricNDSolveValue. Now, I have another ODE, which has as initial condition the solution of ...
52 views

### Getting InputStream errors when including a call to ElementData within an Import definition

So I am writing an ImportExport converter for a common chemistry file format, and I've run up against a problem that seems to be about shared streams and whatnot. ...
191 views

### function returning 0

Why is my function returning 0? ...
195 views

### Approximate solution to system of polynomial equations

I'd like to solve approximately the following system of equations for $a_1$, $a_2$, $\alpha_1$ and $\alpha_2$ all real and nonzero: ...
97 views

### ParallelTable of ParametricNDSolve objects fail

There seems to be a problem with ParametricNDSolveValue togeteher with ParallelTable First we create a ParametricNDSolveValue object ...
112 views

### ParametricNDSolve: Fails to differentiate an matrix differential equation

It seems like there is a problem with differentiating a ParametricNDSolve object when the underlying system contains an matrix differential equation. Create a simple ParametricNDSolveValue object ...
127 views

### Show Simplified Directives [closed]

Is there a way to force Mathematica to convert an already rendered Graphic to the simplified Directive form of that Graphic. Background: I am currently editing Graphics using Drawing Tools and then ...
148 views

### Print indexed (by subscript) variable name systematically

I have some variables : Subscript[S, 1], Subscript[S, 2]...etc. But they are defined in a for loop like For[g = 1, g < 4, g++, Subscript[S, g] = g]; Later, I ...
90 views

### HoldForm and RandomChoice

I'm trying to get random expressions displaying. For that, I'm starting with addition, multiplication, substraction and division. When trying out this code ...
132 views

### Generating a list of contour pixels for a morphological component

I have a set of pixilated shapes, and after transforming each shape into a morphological component, I want to be able to return the coordinates for pixels that lie on the contour of the shape. More ...
94 views

### How to preserve focus on InputField after Print?

If you press Enter in the example below it should become clear that test is being adding to the textbox instead of the current ...
123 views

### Extracting lists from list based on length

I have a list looking like this; ...
132 views

### Time ColorFunction

I have the following data ...
241 views

### ParametricPlot3D and Sphere Graphics

I'm trying to put a sphere into a 3D parametric plot, but I seem to have a strange problem. Here's the code: ...
149 views

### Manipulate list from Excel [closed]

I'm trying to import a file from Excel. In fact, I've been trying to do it all day. The problem is that it does not show up in the right format. Where columns in Mathematica represent columns in ...
121 views

### How to automatically put the part of a variable name after the first letter in symbolized subscripts?

So here is what I have thought: Use ToString and StringLength in order to get the number of characters in the variable name. If it is bigger than one, change variable name by putting everything but ...
843 views

### Mathematica 8: ContourPlot finding out max and min function values [duplicate]

I have a ContourPlot where I have let Mathematica draw the contours automatically. I would like to extract the zmax and zmin contour values that have been determined internally so that I can pass them ...
151 views

### RevolutionPlot3D: revolving around a line NOT an axis [duplicate]

Is it possible to revolve a function around a line instead of an axis? For instance I would like to revolve the quadratic function: f[x_]:=-0.45(x-1.5)^2 ...
142 views

### Understanding the computation of IntensityCentroid?

If I have an image img, and I ask ComponentMeasurements to return "IntensityValues" for the ...
221 views

### Finding the time at which an Ito process satisfies a constraint

I want to run an Ito stochastic process. I have the following parameters ...
148 views

### Averaging multiple 2D data sets

I have multiple data sets, each of which is a 2D matrix. I want to construct a new 2D Matrix in which each element is the average of that element for all the original data sets. i.e ...
127 views

### webMathematica on Linux

I have been using Mathematica and webMathematica (with application server) in Windows and it was working fine. Recently we changed to Linux, so I have to install both Mathematica and webMathematica ...
82 views

### How to make the StringExpression not occur in my case?

Why is there a StringExpression in the following code? ...
534 views

### Keeping Nonlinear Model Fit Real

So I am using the NonlinearModelFit (NLM) command with a fairly simple function. There are 4 unknowns and the (x, y) points that ...
162 views

### Problem with Integrate

...
234 views

I am trying to read in the FITS file into Mathematica. My FITS file is very simple, it should be 2 columns of numbers. What should be the correct Mathematica command to convert this fits file into ...
118 views

### problem with exporting transparent object to pdf in version 9

Here is the code: Export["~/Downloads/1234.pdf", Graphics3D[{Lighter[Black], Opacity[0.5], Polygon@Table[{Cos[x], Sin[x], 0}, {x, 0, 2 \[Pi], 0.01}]}]] in ...
174 views

### Custom TransformationFunction in Graphics? GeometricTransformation::nonaffine error

There are many functions in Mathematica, which return expressions with TransformationFunction head, for example RotationTransform. Unfortunately, there is no ...
466 views

### PlotStyle in ListPlot: change color scheme, manually choose color of first plot

Say i have this data: data1 = Map[Cos, Range[0, 20]]; data2 = Map[Sin, Range[0, 20]]; And i want to plot data1 in gray and a ...
174 views

### Locator following other locator in DynamicModule

I'm trying to create a dynamic environment where I specify, using two locators, the initial condition (position (x,y) and velocity angle (alpha)) of a 2D particle. To simplify, I'm assuming the ...
152 views

### Equating two lists, element by element

Say you have two lists: listA = {a, b, c} listB = {d, e, f} How would you produce a listC that equates each of the two's ...
137 views

### Why doesn't ParallelMap improve the performance of FoldList?

This question arose during my analysis of the following problem: filling gaps. (The code used here is Simon Woods's work.) FoldList seems to not cooperate with ...
201 views

### plotting output from FindRoot

I am an R user and am totally new to Mathematica. I am trying to find the roots of a system of two equations over a series of paramter values and plot the results. I can do the computation but would ...
132 views

### How can I preserve the properties of edges of the original graph $g$ in a subgraph that doesn't include every edge of $g$?

The closest question to the following I could find was Preserving labels when using graph functions, but it doesn't seem to cover this. Consider a graph g where ...
281 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 ...