All Questions

39 views

Can mathematica be configured to auto pair different parenthese?

In DrRacket, the editor can auto pair different parentheses, for example code like (let [(x 3 and whether press ) or ...
120 views

Finding largest Range in a list

In a list of positive integers, I would like to find the largest n such that Range[n] is a subset of the list. So for example ...
31 views

Loops over multiple variables (negative i_min)

Can someone explain why i ranges from -3 to 3 in the output of Do[Print[{i, j}], {i, -3, 3}], but not in Do[Print[{i, j}], {i, -3, 3},{j,-i,i}]? I was thinking for the second input I would get ...
293 views

I was hoping to find an elegant solution to this riddle, using only a line or two of Mathematica: Santa Claus was telling one of his elves: "If I multiply the age of three of my reindeer, I get ...
365 views

Save as pdf broken in version 10.0.2?

It looks like the save as pdf is broken after I update to version 10.0.2. The labels in the plot become a mess. Are there ways to fix it? The Export function works ...
52 views

I need to make and manipulate a group ( the quaternion)

I am trying to define a group and use it to defined its classes, its character table, and irreducible representations. I am having trouble finding code to define a group and use it.
36 views

Defining the value of variable after expansion

I have an initial equation defined as: x = Subscript[a, 0] + (1 - r^2)/Sqrt[1 + r^2 - 2*r*Cos[\[Theta]]]; I want to taylor expand this after subbing in: ...
86 views

Solve a differential equation with an integral inside?

I am trying to solve this differential equation in Mathematica: y'[t]+integral from 0 to t of y[x]dx =e^(-t) where y[0]=0. Is this possible?
94 views

How would I rotate a table of Cuboids around the y axis?

Currently I can print out this using Graphics3d: Here's the code: ...
50 views

How to find only the negative Imaginary solutions and positive Real solutions?

Following this post Help Please : Error in plotting the solutions of FindRoot , I want to plot only the negative Imaginary solutions Wi(K)<0 and positive Real solutions Wr(K)>0. Please, how do it? ...
16 views

I am currently using CopulaDistribution and have been generating RandomVariates from this distribution. Say my code looks sort of like this (this is much simpler) ...
138 views

Create an image showing max intensities in a set of images?

I would like to use a set of two images with the same color scheme (img1 and img2) to produce a new image (...
204 views

10.0.2 mapping Association to Dataset warning

In 10.0.2 ExampleData[{"Dataset", "Titanic"}][All, <| "gender" -> #sex|> &] Outputs the expected result, but also throws: MapAt::partw: Part ...
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59 views

BarLegend using Function that uses Blend

I'm sorry if this is a duplicate, but I don't even know how to look for it. I had this line of code that worked on a Notebook I wrote on Mathematica 9.0: ...
159 views

Did 10.0.2 break some forms for named slots?

Since 10.0.2 some code that previously worked using named slots fail in very particular circumstances. Attchd screenshot shows the issue w/ a particular Dataset ...
30 views

How shortening argument test when declaring functions?

When defining some functions which depend in many arguments sometimes we need to include question Q constraints to diminish processing time. My question is simple, there is a way to shorten a long ...
93 views

Customize keybindings without modifying files in the installation directory

I would like to know if I can modify key bindings without being able to modify the KeyEventTranslations.tr in the installation directory. So maybe putting another one in my home dir and ...
47 views

About choosing the specific number for a function

If I have many numbers in here {{A,B},{C,D},{E,F}.....} And I want choose the B,D,F,....(the second number) to run a function y=f(x), where x=B,D,F.... Then I need to check if y=f(B) is equal to A or ...
60 views

How to eliminate tick marks, retaining tick labels, in ArrayPlot (and related functions)? [duplicate]

Consider the following example: ...
33 views

How can I make the script level styles imitate TeX?

In math mode in $\TeX$, there are four styles that are used to determine what font will be used to typeset parts of a formula. In decreasing hierarchical order, they are, with default font size in ...
122 views

Invisible graph edges

I have a fairly sparse adjacency matrix for which I can draw the graph. Right now, two nodes $i$ and $j$ are connected, or not ($w_{ij} \in \{0,1\}$). However, I have come up with a way to define new ...
65 views

GatherBy based on condition imposed on index variable

Excuse me. This might be user specific question but I need your help. I have an indexed data, where positive integers are used for indexing data. I am trying to group data putting condition on index ...
45 views

simplification issues

The first are from an old paper, dealing with the evaluation of elastic Green function in a transversely isotropic medium (Hill 1964). ...
56 views

Anyone knows the algorithm used by NullSpace function?

NullSpace function gives a list of vectors that forms a basis for the null space of the input matrix. When the rank of the input argument matrix $M_{m\times n}$ is ...
32 views

assign different values to the function of ContourPlot

I have a H function which describe the location of the same temperature. I can draw the function with ContourPlot. But the real value of the temperature needed to be calculated separately. I need to ...
50 views

Ideas for introduction to Mathematica on Raspberry Pi [closed]

I'm looking for ideas for demonstrating the capabilities of Mathematica to people who haven't used it (this will be on R-Pi but needn't be anything specific to that). I don't mean anything ...
51 views

Why is this ImplicitRegion empty?

I'm having trouble understanding why the following RegionPlot code produces results: ...
226 views

Import data from first/last 100 rows of a file

If one wants import data from the first three rows of a file "myfile.data", one can use the command Import["myfile.data",{"Data",{1,2,3},All}]; However, if I ...
37 views

Finding a solution when there are two piecewise functions at play

The goal is to mathematically figure out where is the point when the both of the diagrams are the same distance to the Y-axis. The solution to such a problem can be obtain quite easily by just ...
26 views

Basic stylesheet customization of “Text” cells not working for me

I have learned much from other posts about stylesheet customization. Here is my procedure: Step 1 - Open a new, empty document. Step 2 - Format..Edit Stylesheet. I have added the following ...
41 views

Stylesheet Customization improved in Mathematica 10?

I have been struggling with customization of stylesheets in Mathematica 8. Other users have commented on its byzantine quirks. Before justifying an upgrade to Mathematica 10, I need to ask if the ...
42 views

Apart for complex roots?

Let p[x] be a polynomial in x and consider the partial fraction decomposition of 1/p[x]. ...
172 views

What does f_[whoCalled]^:=f really mean?

I came across the following post by John Doty in this Google Groups discussion: On Friday, January 11, 2013 8:23:16 PM UTC-7, amzoti wrote: It is clear the Mathematica uses Lisp as one ...
32 views

How to use ito calculus in mathematica for multiple SDEs

I have following SDE's dS1 = mu1 S1 + sigma1 S1 dW1 dS2 = mu2 S2 + sigma2 S2 dW2 E[dW1 dW2] = rho This can be extended to multi asset case also where we have ...
128 views

Only show part of a cube below an intersecting plane

I plot a cube and a plane. I just want to show the part below the plane. The code: ...