# All Questions

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### Wolfram Alpha and LaTeX [closed]

Does WolframAlpha use LaTeX to represent mathematical characters? Is there any way to copy the LaTeX output?
59 views

### Determine return type of CompiledFunction expression

Is there a way to extract the types of the arguments and the return type from a CompiledFunction expression? I am writing a package for code generation (basically a wrapper around CCodeGenerate) where ...
336 views

### How to find the intersection points of two circles in 3D [migrated]

I have two circles in 3D space generated from their parametric equations. Also, these two circles are on the same plane. How can I find out their intersection points from the parametric equations? ...
106 views

### Filling a curve towards toward the top of the plot

I have a curve. If I want to color fill or shade, not towards axis but upward form the curve, what command can I use?
96 views

### Continuous 3D Arg Plot

I have a problem with jumping phase plots using the Arg function in mathematica. I have looked at the other questions already asked here (e.g., continuous phase/Arg ...
59 views

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### Generating 2D models from a 3D model

I have a model of cube with randomly distributed spheres included there. ...
145 views

### Book about using Mathematica in real world engineering projects

So far I've abused Mathematica by only using it as a notebook. That's a big waste since I've bought a student-life time Mathematica 9 / SystemModeler license. My problem is that I'm not inspired to ...
56 views

### Numerical Solving Problem, PDE

It is not possibel to solve the given equation numerically or analytically with Mathematica. ...
27 views

### Held keys in associations

Jacob Akkerboom commented: Note that PositionIndex does work correctly with held expressions, whereas this is a bit painful to implement using ...
21 views

Problem: I have cyrylic symbols in my $UserBaseDirectory. As result temporal directory for CreateExecutable... 0answers 33 views ### distributing definitions in an .m file and memory I am dealing with a huge table stored in an .m file of size 4 GBs. Somehow when I call the table in .nb file it seems the memory increases not by 4 GBs but more than 10GBs (roughly checking from task ... 1answer 32 views ### NMaximize not substutiting parameters of objective function [duplicate] NMaximize is not substituting parameters of its objective function. Is there a way to fix that? I have a three line program that exhibits the problem. ... 1answer 67 views ### Possible bug / numerical issues with HypergeometricU — any suggestions for a fast workaround? I've encountered some problematic behaviour with HypergeometricU. I have a probability distribution on the positive integers that takes the following form after ... 1answer 58 views ### How can I create a set (list) provide a kind of rule/algorithm? Example: S = {r ∈ Q : r² < 2} Let S be the set of all rational numbers whose squares are less than 2. It follows that 1 ∈ S, 4/3 ∈ S, but 3/2 doesn't ∈ S because 9/4 ≥ 2. Thank you. 2answers 126 views ### Graph expansion on Mathematica Is there a way by which Mathematica can be given a graph as an input and be asked to find its expansion? Note: By "expansion" I mean the quantity called "isoperimetric number" or "Cheeger constant", ... 1answer 64 views ### NSolve for complicated equation involving double cross product I have the following issue. I am trying to solve a 3-vector equation for the vector slx, sly, and ... 0answers 136 views ### Greek variables in 10.0.1 10.0.1 under Ubuntu 12.04 x64 .... Does everybody get greek variables emboldened? Is anybody aware of how to revert to previous normal display? The image below shows what I mean. 1answer 101 views ### Solution to a T+U = E equation I needed to solve really easy differential equation (in dimensionless units):$$\mathcal{T} (\dot{\xi}) + \mathcal{U} (\xi) = \text{const.} \equiv \varepsilon ; \quad T(\dot{\xi}) = \dot{\xi}^2 ; ... 1answer 49 views ### Bug with Initialization in DynamicModule? In exploring Tracking Initialization, I came across this. The following usually shows a value for x of 300000 to ... 3answers 227 views ### How to plot a series using different colors depending on the y-value I have a sequence of numbers${x_1,x_2,\ldots,x_n}$. I would like to plot the sequence using ListLinePlot but use a different color depending on if the values$x_i$are within$a_i<x_i<b_i$. ... 1answer 113 views ### Tracking Initialization How to track Initialization step by step? Any tricky solution is ok. One condition, x should be ... 2answers 144 views ### Extracting the function from InterpolatingFunction object I've used Interpolation[] to generate an InterpolatingFunction object from a list of integers. ... 3answers 192 views ### Find all heads a function is defined on So say I've got a function g defined as follows: g[x_Integer] := x + 1 g[s_String] := s <> "!!!" How would I write a ... 0answers 53 views ### How to generate a 3D terrain from a terrain-map image? [closed] I attempted to generate a 3D terrain from a terrain-map image with the following code. What I got was a NULL terrain. What is wrong with my code? ... 3answers 877 views ### An inverted pyramid I want to draw a pyramid approximately like this ... 3answers 105 views ### How to multiply specific columns in a matrix of data? So I need to make a plot of some ~2000 data points I have from a spreadsheet. I'm able to import the data just fine, it stores it like so sundat ... 0answers 63 views ### Solving a system of two nonlinear equations with many symbolic parameters I have two nonlinear equations with two unknowns,$x$and$y$, and many symbolic parameters,$a, b, c, d$. They look someting like:$\frac{1}{x}(1+x)^a (1-b)(cx+dy)=0... 2answers 85 views ### How to SemanticImport Multiple Excel Sheets I have an Excel workbook with multiple sheets that I'd like to import into a dataset each. With Import I can target individual sheets by their name into a nested ... 2answers 135 views ### Vertical (mis-)aligning of plotmarkers and legend text in V10 PlotLegends Consider this example, taken from the docs and modified for a larger font size using Style (V10.0): ... 0answers 62 views ### Overflow problem [closed] I am Rajat, working out a fluid flow problem using shooting technique with 4th order Runge Kutta method. The problem wants me to guess 3 initial values simultaneously. for this i used 4 nested FOR ... 0answers 32 views ### Interpolation on an unstructured (mostly-structured) grid in 4D+ I frequently need to perform interpolations on an unstructured grid. Mostly, with the purpose of filling grid holes and then later continue with regular grid interpolations. Mathematica V9 and V10 ... 1answer 36 views ### How can I disable the “convert to freeform linguistic input” dialog box? So I'm putting in some function, busy typing away. Then after I've entered some text, I pause for a few seconds. In this time, the notebook pops up the question "Convert to Free-Form Linguistic ... 1answer 135 views ### Extract common subexpressions from expressions [duplicate] I am trying to evaluate multiple independent expressions with common parts. I would like Mathematica to somehow give me this common parts. It's probably not so clear, so let me give you an example. ... 2answers 152 views ### A question regarding “DiscretizeGraphics” I want to find the volume of a torus torus = RevolutionPlot3D[{2 + Cos[t], Sin[t]}, {t, 0, 2 Pi}] ... 0answers 46 views ### Inconsistent linearity of inverse Fourier transform Bug introduced in 8.0.4 or earlier and fixed in 9.0.1 or earlier I am trying to compute the inverse Fourier transform of this expression ... 0answers 26 views ### Word wrapping in Code cells The style for Code cells has no word wrapping. I don't like this as code lines either have to broken manually (with ugly, poorly indented results) or left largely invisible beyond the right of the ... 0answers 21 views ### Meaning output ANOVA post hoc tests I am carrying out an ANOVA in Mma, and I wanted to apply a post-hoc test, but I do not understand the output that is given. It says e.g. Model-> Duncan, {4, 5} ... 1answer 672 views ### Is there a better way to “grow” black tulips? I used the following clumsy way to obtain a bundle of black tulips. Is there a better way to do so? ... 2answers 164 views ### Rounding the coeffcients in a polynomial I have a very large polynomial with Complex Numbers as coefficients. Due to many calculations, there are rounding off errors. I know however by theoretical considerations, that the coefficients are ... 0answers 31 views ### StateSpaceRealization “ControllableCompanion” does not generate ControllableCompanion form from DE I must be doing something wrong, but do not see it. There is an option in Mathematica control system function StateSpaceModel where one asks it to generate the ... 1answer 82 views ### Function returned an unexpected list I was trying out a question in Wellin's Programming with Mathematica that says the following. Question: Given a set of points in the plane (or 3-space), find the maximum distance between any pair of ... 2answers 158 views ### Interpolating an Antiderivative I'd like to be able to make InterpolatingFunctions for antiderivatives of functions that can't be integrated symbolically. However, the following code returns several error messages: ... 2answers 59 views ### Manipulate a parameter within the PlotLabel Very similar to Parameters in plot titles in which I want to call a parameter from an array using PlotLabel in my plot using ... 3answers 82 views ### Create a closed notebook When using nb = CreateDocument[], is there an option that prevents the notebook from opening automatically? And is there a command that opens the notebook when ... 1answer 55 views ### Remove values from list element, and add to other element Basically what I need is to make a list of 400 elements, all have value 1. The next step is to create a function, that subtracts value (-1) from an element, and adds that to another element. So: ... 4answers 305 views ### Implementing the Newton -Raphson method for finding the zeros of a function ... 0answers 38 views ### Using indexed variables to make a vector — Iteration limits exceeded [closed] I am trying to do an implicit numerical integration scheme for the 1D heat equation. This basically amounts to diagonalizing a matrix equation at every time-step of the simulation. So in order to do ... 1answer 242 views ### Kernel crashes when plottingz=\sqrt{(x^2 + y^2)^0}\$

Bug introduced in 7.0.1 or earlier and fixed in 10.0.1 I'm plotting a 3d-function, which makes Mathematica9 (at windows 7) crash all the time. Is it only for me or for somebody else as well: ...