# All Questions

537 views

### How to perform fuzzy lookup between lists?

I have two big lists with 10,000 lines each, with product names from different databases. They have a lot of common products (50%), but they are not typed in the same way. For example there is one ...
140 views

819 views

### Grain(Particle) Size Distribution (PSD) Analysis with Mathematica

I would like to do an analysis of the grain size distribution of a Monte Carlo Grain Growth simulation I implemented based on the nice example by Rituraj Nandan (see Link). The result of this ...
170 views

### What is the point of Refresh if Dynamic has an UpdateInterval option?

I haven't found an example where I can't get rid of Refresh[]: ...
499 views

### How to determine the remaining sides given the three angles and one side of a triangle?

The measure of the interior angles of a triangle are $15^\circ$, $30^\circ$, $135^\circ$ and the length of one edge is 3. In order to determine the length of the remaining two edges, I've tried ...
558 views

### How to change coordinates of a differential operator?

I'm doing a basic quantum mechanics problem and am trying to learn how to do it in Mathematica. Any help would be much appreciated. $\vec{L} = \vec{x} \times \vec{p}$ where $\vec{x}$ has ...
2k views

### How to convert output of a For loop into a list

I have written a For loop in my Mathematica notebook. This For loop, when activated, will generate a sequence something like: ...
160 views

### Uniform scaling of a Table of Graphics objects?

Row[Table[Graphics[Rectangle[{0, 0}, {2^k, 1}]], {k, 0, 5}]] yields However, I'd like uniform scaling of the rectangles, i.e., each rectangle should look twice ...
381 views

### Showing the terms in a partial sum?

I am trying to get s[n_]:=Sum[1/2^k,{k,1,n}] to show me the actual terms involved in the $n$th partial sum and not just the sum itself. I've tried ...
162 views

### Manipulate and FileNameSetter don't want to play nice together

In a Manipulate, one can specific the type of an individual control like so: Manipulate[v, {v, Red, ColorSetter}] I tried to ...
195 views

### Pattern constraint for two or more variables

Is it possible to have a pattern constraint for a function with two or more variables where the pattern is a relation between the vars being accepted e.g. ...
110 views

### How can I define an option “packet” for plots so I can only alter the definition and all plots with that “packet” will change appearance? [duplicate]

Possible Duplicate: Consistent Plot Styles across multiple MMA files and data sets So, here's my problem; I have a lot of data that is shown in different plots. I want all the plots to have ...
651 views

### How to work with Application Project files in Wolfram Workbench?

I have figured out that in a basic project I simply have to call the main package (m file) from the notebook using <<nameofmfile` and then the notebook ...
464 views

### How to make brute force coding more efficient?

Hi guys and guysettes, The little Mathematica I've been using/seen so far, it seems to be all about neat "one-liners" using the underlying functions and working with lists & maps to solve issues, ...
471 views

### Import values from tab separated file, change decimal point?

I have files that look like this: ...
1k views

### Constructing election cartograms?

I found this pretty neat page showing cartograms for the US elections and I don't really know how to get started doing these graphics in Mathematica. For those who don't know, a cartogram is a map in ...
260 views

### Table not working with Plot

Because NIntegrate[] does not support parallel computation out of the box, I'm doing a simplified version by breaking the integration limit into pieces and using ...
242 views

### How do I numerically solve a custom function?

Whenever I use functions like FindRoot or NDSolve, it sends x through the function and deals ...
227 views

### Overlay of pdf using PairedHistogram in Mathematica

With a standard 1D histogram, I can generate a pdf overlay using Show and Plot. I'd like to do something similar with ...
336 views

### How can I force points in a list to have distinct x values?

I have a list of points that may be used for linear interpolation using Interpolation and need to ensure that no two points have the same $x$ value, since, if they ...
420 views

### Converting expressions into functions

I have defined an expression, such as a = x I would like to convert this into a function, such as f[x_]:=x However, in my ...
180 views

### Order of operations for the Table function [duplicate]

Possible Duplicate: Using pure functions in Table I have run into a situation that I do not understand when trying to generate a nested list of pure functions. I have the following code. ...
229 views

### Getting slightly different results in fitting a logit model in R and Mathematica

I'm fitting some data to a Logit model in both Mathematica and R and I'm getting slightly different results. R code: ...
167 views

### How to efficiently find multimap k-itemset frequency

I am doing this to learn association rules. The data d is in format {id, value}, for example: ...
118 views

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267 views

### Keep palette visible when Mathematica application loses focus

When the Mathematica application loses focus, palette windows disappear (normal notebooks and dialogs (CreateDialog) stay). This is usually convenient because the ...
754 views

### Efficient evaluation of functions defined by NIntegrate

I have a complicated function $f$ and I want to plot the function $F(x)$ defined by the definite integral of $f$ from $0$ to $x$: $$F(x) = \int_0^x f(y)\mathrm dy.$$ Apparently $f$ cannot be ...
164 views

### Selecting a Point that has the Lowest Absolute x/y-coordinate From a List of Points

Given that there is a set of points, for example, {{3,4,2},{5,2,-1}}. How do I go about selecting the point that has the lowest absolute x, y or z-coordinate from ...
832 views

### How do I switch between dashed and undashed styles in ParametricPlot?

I am trying to generate a parametric plot in Mathematica 8 using the following: ...
355 views

### How to effectively diff a notebook?

How to effectively diff a notebook with another version of it? This is usually needed/encountered in revision control, but can be generally useful. What i currently do is disable notebook history, ...
534 views

### Solving linear equation

I want to solve following linear equations: \begin{align*} 3 x - y &= 0\\ y + 2 z &= -1\\ x + y + z &= 3 \end{align*} The output will be ...
83 views

### Width of two plots [duplicate]

Possible Duplicate: Vertically aligning two separate plots Trying to illustrate the sums of functions, high school math class... Found a great demonstration on interference patterns, so ...
626 views

### exporting eps figures maintaining the same size

I need to export some (2D) graphs from mathematica in eps format (only, unfortunately). The graphs are of similar nature (plotted from our different functions), and I have used the ...
270 views

### How can I set an image size fully depending upon ImageSize?

I have an image assigned to myPicture myPicture = ...
230 views

### Trying to plot this probability

Can anyone help me plot this? log P(X >= x) = alpha logx x=0.001 + k(0.001) k= 0, ..., 100 I can't figure out the coding for this.. I've been trying this for a while, and can't seem to figure it ...
396 views

### FindRoot errors

I'm trying to solve a system of two equations in two variables for some range of parameter values. I use ContourPlot to see where I should look for a solutions and ...
336 views

### Is there a way to do conditional matrix loop using 'continue'

I have the following: ...
266 views

### White regions in DensityPlot — is this a bug with ColorFunctionScaling?

Is this a bug with ColorFunctionScaling? When I try to supply my own ColorFunction Mathematica seems to partially ignore it, ...
816 views

### Solve system of ordinary differential equations that doesn't have an initial condition (t=0), but has an inifinity condition (t=infinity)?

I have a question for solving t -> Infinity on Mathematica. First, I have a system of ODEs: ...
244 views

### GeneralMiniMaxApproximation - Dividing out the zero

MiniMaxApproximation is used to generate minimax approximations. I'm interested in the "dividing out the zero" trick. The documentation discusses a nice example. Suppose we want to construct a ...
1k views

### Gradient/ColorFunction in Disk with transparent background

My goal is to make an iOS-like enable/disable switch like this: I use a LocatorPane for the slider with so-called "jumps" to only make two settings possible: ...
236 views

### How to solve a system of ordinary differential equations contain a interpolating function?

I'm wondering how I can solve a system of ODE that has a interpolating function? For example, z and y are ...
123 views

### How to display only a certain part of the content in a Panel?

I have a Panel of size {850, 400} as myPanel with a Pane of size {450, 400} and four images ...
283 views

### Plotting reordered clusters with different colors and joined lines

I would like to show how typical days of energy load (found through clustering of a years worth of data) are spread throughout a year in a single graph with a color for each 'typical day' (or ...
553 views

### How to clear just variables defined in one notebook?

I'm trying to set up some notebooks so that I have one "seed" notebook that defines all my values globally when I run it. I have three other notebooks that take these values and run with them to do ...
225 views

### Self-referential list or table of buttons

How could one create a table or list of buttons, such that clicking on a button removes the button itself from the list?
84 views

### Non Commutative Multiply [duplicate]

Possible Duplicate: Non-commutative symbolic linear algebra I want to multiply two matrices, for example, A = {{e, f}, {g, h}} B = {{a, b}, {c, d}} ...
302 views

### Convert values at level {3} in a list to percentages

I have the list ...
I would like to fit a function of the form: $a \log(b x)$ to a set of data: ...