1
vote
4answers
198 views

How to use If to select arguments min & max in Range?

I want to call Range[] with its arguments depending on a condition. Say we have ...
2
votes
0answers
89 views

Speed improvement in string distance function

I'm using this distance function to compare distance between strings: ...
3
votes
2answers
146 views

Create a new window from CDF, such that it contains a Manipulate. Force this Manipulate work.

I have a notebook with such a button creating code: ...
5
votes
2answers
480 views

Volume of a graph

I have the following list: ...
4
votes
1answer
129 views

Running unit tests while debug session is running in Workbench

Is it possible to run unit test while a debug session is already open in Wolfram Workbench 2.0? A typical use case follows: I have a debug in Workbench session open. I evaluate some cells in a ...
8
votes
3answers
744 views

Checking for duplicates in sublists

I have a list with contains entries that are length 8 sublists,i.e. L1={{a1,b1,c1,d1,A1,B1,C1,D1},{a2,b2,c2,d2,A2,B2,C2,D2},...} and so on. Now, in my problem two ...
1
vote
0answers
179 views

Having Mathematica solve or help solve a set of 8 equations

There is a set of DDE's that arise in leukemia dynamics and I'd like to find the equilibrium points of the system by setting all of the derivatives equal to zero. The system can be described in ...
5
votes
1answer
591 views

Using SimMetrics Java Function on Mathematica

I would like to know if it's possible to use/install this java library on Mathematica. This library, named SimMetrics, has a lot of string similarity functions that I would like to test. Here is the ...
3
votes
2answers
304 views

How do I use Mathematica as a vector drawing program?

Recently I changed my furniture in my room and I am trying to find the best position of each part. I am sure that Mathematica could help! I read the LocatorPane, selecting multiple Locators for ...
4
votes
4answers
172 views

Change the colour of a ListPlot element in each iteration of Manipulate

I would like to modify the colour of dots in a ListPlot[Table[function]], e.g ...
5
votes
1answer
393 views

Efficiently generating histograms with large numbers of bins

I'm trying to generate a histogram for a large data set with the following lines of code: ...
8
votes
6answers
213 views

Custom Matrix product

I have a list: list1 = {{{a1, a2, a3}, {b1, b2, b3}}, {{c1, c2, c3}, {d1, d2, d3}}}; I want an operation that gives me: Is there a built-in way of doing ...
0
votes
2answers
159 views

Inverse function

What probably could be the inverse of following function? ...
4
votes
1answer
135 views
0
votes
1answer
446 views

How can I solve a set of non-linear equations?

I was wondering whether someone can give me an idea on how I can solve a set of non-linear equations with an unknown exponent This is what I have: Known values: N, R Unknown values: λ, α, J ...
1
vote
1answer
586 views

Problem in solving PDE

I have a problem in solving a type of PDE. The actual problem involves diffusion and adsorption in a trench, but here is a simpler example. I have two independent variables $t$ and $x$. There are two ...
5
votes
1answer
338 views

How can I log in to my Wikipedia account and access my watch list?

Wikipedia's "Edit Watchlist" page (for logged in users) has a list of hyperlinks to the user's watchlist (here is an example from my account). I've tried to use ...
2
votes
1answer
151 views

Change the behaviour of a LocatorPane

Normally, LocatorPane detects any single click as in the following example: ...
5
votes
1answer
172 views

Are there functions or packages in Mathematica to sort subsets in lex order, colex, revlex, etc.?

I am looking for non-canonical sorts of lists. A function that would give: Sort[X, "order type"] With "order type" being colex, revlex, etc.
5
votes
3answers
265 views

Drawing CountryData groups

I'm sure I'm overlooking something obvious, but I can't draw groups of countries. Here are two countries and two country groups: ...
4
votes
4answers
800 views

Simplifying a trigonometric expression

I'm sure this has been addressed before, but I can't find it! I want Mathematica to simplify Sqrt[1 - Sin[π/6 - θ]^2] to ...
2
votes
2answers
425 views

Determinant of a large matrix and solution of a linear equation

I am trying to solve a linear equation in x, where the equation is given by Det[M]==0. The M is a symmetric matrix (dimensions 47x47) with an element equal to x and all other elements are equal to ...
2
votes
3answers
316 views

How can I reorder the factors in the terms of a polynomial?

How can I reorder the factors in the terms of a polynomial? Consider ...
1
vote
0answers
95 views

Can we ask ComponentMeasurements to use NonLinearModelFit to return a covariance matrix for underlying intensity data?

I'd like to be able to calculate a covariance matrix for some data underlying a morphological component. Provided this data, I can write something like: ...
4
votes
1answer
197 views

Asking Mathematica to produce a function of some variables

Given $$l_0=\sqrt{\frac{\lambda_1(\lambda_0+\mu_0)}{\lambda_0(\lambda_1+\mu_1-1)}}$$ and $$l_1=\sqrt{\frac{\lambda_0(\lambda_1+\mu_1)}{\lambda_1(\lambda_0+\mu_0-1)}}$$ ...
4
votes
2answers
155 views

Replace function call with expression resulting from the symbolic evaluation of the function when defining a second function?

Suppose the evaluation of a function f[x_, y_] := ... takes a very long time, but the output is a not-so-complicated polynomial in ...
2
votes
1answer
117 views

Tooltips with Popupmenus, can't supress the popups prior to clicking

I'm trying to add popupwindows to tooltips for points on an ErrorListPLot but all the popupwindows appear on screen immediately when I run the command below that plots the graph. After closing all ...
0
votes
1answer
225 views

Is the formula $\sum _{m=1}^{n-1} \prod _{k=m+1}^n x_k x_m$ wrong in the wiki's page

SymmetricPolynomial[2, {Subscript[x, 1], Subscript[x, 2], Subscript[x, 3], Subscript[x, 4]}] $$\begin{align*}x_1 x_2+x_3 x_2+x_4 x_2+x_1 x_3+x_1 x_4+x_3 ...
1
vote
4answers
285 views

converting between forms - symbols/subscripts - matrix products

If I have a vector of the form (xp+y, x+yp) do you have a simple way of creating the following matrix and vector from it: {{p, 1}, {1, p}} * {x, y}, such that ...
6
votes
2answers
150 views

Looking for feedback on this function

I'm not sure this is an appropriate question; if not, I'm sure someone will close it :) I've got the following function, listed below; its job is to accept a graph (function) presented either as a ...
42
votes
4answers
1k views

Automatic e-mail/text message when a calculation has finished?

Sometimes Mathematica takes quite a while to finish calculations and it would be convenient to be able to move away from the computer while it is working. I was wondering if there is any "clever" hack ...
1
vote
1answer
552 views

Manipulate showing the trajectory of a particle along a parametric curve

I have a particle which follows a certain trajectory given by rx and ry ...
5
votes
8answers
404 views

Extracting matrix rows when one of its elements is part of a list (without a loop)

I have a matrix whose rows I want to extract based on whether the elements of one of its columns is a member of another vector (calling it the "comparison vector"). I would like to get better at ...
10
votes
3answers
188 views

Pattern matching on Orderless functions inside Hold

MatchQ[Hold[1 + 2], Hold[2 + 1]] returns False. But in the presence of a Blank[] in the ...
7
votes
1answer
210 views

ListLinePlot not showing filling

My code is ...
-3
votes
2answers
130 views

StringCases functionality

I have a list of strings in where each element of the list is in this form: ...
7
votes
2answers
376 views

How can I define a sequence of functions?

I need to define a function fun, and then re-define this function iteratively. The code is given at the end. First, a function ...
7
votes
2answers
186 views

How to ignore list elements when extracting with pattern matching

If I have a simple list, say {1, 2, 3}, and I want to extract a subset of the elements, what is the correct syntax? e.g. { i, _, j } = {1, 2, 3} I want i = 1 ...
19
votes
3answers
4k views

What are the advantages of using .nb rather than .m files?

I can edit a notebook within the mathematica front end and then Save As a .m file, which produces output like this: ...
5
votes
1answer
168 views

How to write an import converter that can import split and compressed files

First of all sorry if this question isn't formatted properly. I'm working with a data format that prescribes separate header and data files, so for instance ...
4
votes
2answers
161 views
0
votes
0answers
64 views

Defining functions in a loop [duplicate]

I have a symbolic solution to a linear system with respect to some variables a[i,j] which depend on a parameter t. sol=Solve[...,Table[a[i,j],{i,0,n},{j,0,n}]] I ...
17
votes
1answer
178 views

How to format usage messages such that function templates are parsed correctly?

Is it possible to format usage messages (with italic arguments etc) such that Mathematica 9 still parses function templates correctly? For example, plain usage messages work when pressing ...
3
votes
1answer
106 views

Why don't rules applied inside ContourPlot3D work?

The output of the following code is the same as the input. ...
0
votes
2answers
95 views

Cases Message Valid Notebook Structure

Note: Spelunking will likely be needed. Execute the following. You should get back and error along the lines of First::first:... This error is unimportant except ...
3
votes
2answers
104 views

How to add a label to a CopyEvaluate button?

I found a definition of a button Button[Defer[ Information[ \[SelectionPlaceholder], LongForm -> False]], None, BaseStyle -> "CopyEvaluate"] that is ...
1
vote
0answers
177 views

Positive integrand giving negative answer

I'm integrating a positive function f(t) times sin(t) from 0 to pi/5 and get -38. Actually f is slightly negative for a short time (smallest value ~ -0.0005), but far from enough to explain this. ...
5
votes
2answers
245 views

How to add a graphics frame to an image without resampling

Using Inset to place an image inside a Graphics expression with Frame -> True provides a ...
0
votes
1answer
111 views

15 30 50 per page