0
votes
1answer
62 views

Print without linefeed [duplicate]

Is it possible to print with a carriage return but not a new line? I'd like to keep track of the progress of a long calculation without filling the screen with prints.
3
votes
2answers
132 views

Converting unevaluated lists to strings

I have a list like l = {2 - 3, 12 - 4, Times, aab} I want to end up with {"2-3", "12-4", "Times", "aab"} I have tried ...
8
votes
1answer
150 views

Strange behavior of BinCounts

Bug introduced in 8.0 and fixed in 10.0.0 Just try this example: ...
1
vote
2answers
886 views

Solve within a range?

Is it possible to solve an equation in which some some of the parameters have defined ranges? Example: ...
0
votes
1answer
352 views

Discrete peaks to curve via Voigt summation

I have two data sets. One is an experimental recording of an absorption spectrum, composed of regularly spaced (wavenumber, intensity) coordinates with a fine wavenumber resolution, thus making ...
1
vote
1answer
112 views

Custom ticks in distribution chart [duplicate]

I am trying to just get simple logarithmic ticks to the distribution chart, and failing... It is unhappy with any FrameTicks format I try (sparing ...
4
votes
1answer
333 views

Make Plot look like Bloomberg terminal

I've always wanted to make my financial Plots look like a Bloomberg terminal. How would I go about making my chart look like one? I am talking specifically about ...
2
votes
2answers
163 views

Building adjacency matrix from set data

I have two sets: games and players. Players pick their games. As such I will have data say g1={p1,p3,p5},g2={p2,p4},g3={p2,p3,p5}. My interest though is to build the connections among players because ...
0
votes
0answers
41 views

Fitting for multiple data in Mathematica [duplicate]

I've just started to use Mathematica for programming and I was wondering how I could do Fitting for several data sets. For example, I have one curve. For this curve I need to plot a fit curve, if my ...
2
votes
1answer
232 views

Using a web-crawler to search website for occurrences of keywords

Given this list of cities: ...
16
votes
3answers
753 views

2D Visualization of links and knots

I am trying to draw a picture using Mathematica of three loops linking together in 3D as follows. ...
2
votes
1answer
409 views

What's the difference between variables with and without a subscript?

If I input $x = a + b$, the $x$, $a$ and $b$ are blue. When I hit Shif+Enter, the $x$ turns black, indicating the kernel now knows this variable. But when I input $x_r = a + b$, and hit Shift+Enter, ...
2
votes
1answer
162 views

Plotting and ContourPlot

Make a Plot and a ContourPlot that gives the same diagram and use ContourPlot on a ...
-6
votes
1answer
79 views

how to mean of day,month value

data={{{2006, 1, 1, 0, 0, 0.}, 326.492, {2006, 1, 1, 3, 0, 0.}, 323.08, {2006, 1, 1, 6, 0, 0.}, 314.223, {2006, 1, 1, 9, 0, 0.}, 314.361, {2006, 1, 1, 12, 0, 0.}, 322.048, {2006, 1, 1, 15, 0, ...
23
votes
1answer
784 views

Undocumented use of Integrate: Integrating over regions

I have come across a few questions asking about integrating over regions. And while the answers are impressive there should be a better more consistent way. So my question is, are there ways, ...
4
votes
1answer
183 views

Selectively converting numerical strings to expressions

I have a list of strings representing different types of data ...
6
votes
2answers
129 views

Is it possible to get a VertexColors effect in cylinder?

I'm trying to create a figure illustrating a cylinder filled with gas. And I saw a very good looking similar one at here. The shape is polygon and by using the VertexColors option, it creates a ...
2
votes
1answer
115 views

Randomly generated polymer with certain spatial density

For simplicity's sake, let the polymer's composing particle be integer 3-tuples (on 3D Cartesian grid), such that: Polymer-ness -- for all particle there is an directly adjacent neighbor. i.e in ...
2
votes
1answer
55 views

Grouping Nested Lists Based on Differing Values of Single Element

I've a list of lists representing k-rows of truth table having n elements each in a nested list consider ...
1
vote
2answers
490 views

Projection of curve 3D (x,y,z) on the x-y plane

I have a following systeme : \begin{equation} \left\{ \begin{array}{rcr} (\beta+\frac{1}{2}\delta^{2})\nu_{1}(u)-\delta\nu_{2}(u)+\nu_{3}(u)& = &0\\ ...
1
vote
0answers
39 views

can I evaluate multiple cells at the same time? [duplicate]

my laptop has 2 cores, can I assign a core to evaluate one code, and the other core for another code in parallel instead of evaluating in sequence? thanks
0
votes
1answer
107 views

Defining arbitrary order derivatives function [duplicate]

I have a function $\phi(t)$ and I want to define a function $\phi D(t,r):=\phi^{(r)}(t)$, in other words evaluate the $r$'th derivative of $\phi$ at $t$. The naive code that I have is: ...
6
votes
0answers
262 views

How to draw hypercube graphs

I'd like to draw hypercube projections like those on the Wikipedia page: I tried with HypercubeGraph[6] but the graph does not look right; it is not ...
0
votes
1answer
135 views

Mathematica won't maximize my function

I'm trying to maximize two functions. For the first one, the code runs correctly and returns the desired answer ...
2
votes
1answer
149 views

Implementing Kane's Subset Sum Algorithm

In the following paper, D. Kane describes an algorithm for subset sum that runs in logspace: http://arxiv.org/pdf/1012.1336v2.pdf. I am trying to implement it ...
4
votes
4answers
356 views

How to do memoization together with evaluation of a complicated function

UPDATE 2: much shorter version Given a list of paired indices {i, j}={{1,2}, {3,4}, …}, I need to first evaluate a rather complicated function test[i,j,x] (because ...
0
votes
0answers
228 views

Change size of a saved plot or image (post-processing)

I have many plots (that take a long time to run) and each is saved to a variable name. For simplicity, say one was: ...
0
votes
1answer
51 views

What's wrong with my rule? [duplicate]

Consider a simple code to form a SparseArray: Q = 5; a = Table[i, {i, Q}]; SparseArray[{{j_} /; j > 2 -> a[[j]]}, {Q}] Part::pspec: Part specification j ...
0
votes
1answer
55 views

Unexpected behavior of subtraction with approximate numbers [duplicate]

I'm using the Table command to generate a list of values: FullForm /@ Table[10. - x, {x, 2.7, 2.8, .1}] and I get the ...
1
vote
1answer
90 views

Sort lists of vertices {indegrees, outdegrees} by indegree

in = VertexInDegree[F]; out = VertexOutDegree[F]; I want both in and out to be ordered by in. Example: graph has nodes a,b,c with indegrees 1,2,0 and outdegrees ...
26
votes
2answers
1k views

Bug in mathematica analytic integration?

I found Mathematica provides me a wrong answer for a relatively simple analytically solvable integral: ...
1
vote
5answers
652 views

Make a scatter plot from two columns of matrix

I have imported my text-type data as a matrix. I want to make a scatter plot (ListPlot) using one column as x-axis and other columns as y-axis. Is there a ...
1
vote
0answers
99 views

How to optimize my code?

I use Mathematica to handle data.My trial as below: Interpolation function: ...
2
votes
1answer
179 views

Loop in solving multiple matrix calculation

I am wondering is there a way to use loop, like Do, For, to rewrite the last line in the code. I tried to use ...
0
votes
1answer
94 views

RSolve works slow and does not give an analytical solution for solving high order linear difference equations

RSolve@@{{a[n]-a[n-10]==101}~Join~Table[a[i+1]==101+10i,{i,0,9}],a[n],n} I want to get the exact form of general formulas, but ...
8
votes
1answer
281 views

Why do Tooltips slow down Dynamic so much? Is there a faster alternative?

I'm working on a Dynamic ListPlot with a few thousand plots, and it seems that wrapping the points with Tooltip slows the Dynamic responsiveness substantially. With the simple example below, dragging ...
13
votes
2answers
956 views

Rebuild a polygon so it doesn't self intersect [duplicate]

If you consider the following Polygon: ...
1
vote
1answer
84 views
0
votes
1answer
113 views

Contour plot show value change

...
0
votes
1answer
112 views

Finding intersection and graphing

1) How do I find the intersection of f[c_] := y^2 - 2 x^2 (x + 3) == c ((y + 1)^2 (y + 9) - x^2) between the plots of f[0] and f[2] I tried plugging-in numbers. ...
17
votes
3answers
812 views

How to make a pie chart using custom image

Can we make a pie chart using a custom picture? For example, consider this image of one cent coin: I would like to use this image and cut pieces out, depending on data, and also make a clickable ...
0
votes
2answers
222 views

Symmetric function of the roots of a polynomial

First, I'm a beginner. I can compute the sum of roots with the follwing: Roots[x^7 + 5 x^6 + x^5 + x + 1 == 0, x] Plus @@ (x /. {ToRules[%]}) // Simplify Of ...
0
votes
1answer
54 views

Copy big or small values to $\LaTeX$

When I create a DistributionFitTest of a distribution I receive very low P values, e.g. $2.456750213008007 \times 10^{-367}$. When I copy this (by right clicking and copy to $\LaTeX$), and insert it ...
0
votes
1answer
33 views

How to output local variables when error message is generated without interrupting evaluation?

I am running a calculation to generate a dataset. I use several iterations to sweep over a parameter space. A few times an error message is generated (which is not the problem per se). Is it possible ...
0
votes
1answer
896 views

NotePad++ User defined language

I know there is a xml file with language for Mathematica notebook (nb or m files). The link is http://sourceforge.net/apps/mediawiki/notepad-plus/?title=User_Defined_Language_Files Now I want a xml ...
0
votes
1answer
66 views

Optimizing repeated function calls

Easiest way to keep my library nice, is to naively call some functions many times with same parameters. Doing so prevents from zoo of (library-)global variables and complicated initialisation ...
1
vote
1answer
54 views

Replicability of RandomVariate within a function?

I have a rather basic question but can't figure out a foolproof answer. In the following code, I build a function which returns the mean difference between successive elements of a vector created from ...
19
votes
2answers
2k views

Animation of double pendulum

Sadly, I am a completely newbie. I am studying Physics and in our theoretical physics class we got the task to solve the double pendulum using Mathematica. We just got the program, but no introduction ...
1
vote
1answer
87 views

How to create a column for ordering values

I have a dataset, where some data has to be ranked in regard to the number of ranking of the total dataset. I've made a simple example below: ...

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