All Questions

276 views

How to save a web page in mathematica?

For a given web page http://www.nytimes.com/, is it possible to save it as : first: only HTML(within css) second: more elements(include pictures and so on) just like what a browser can do. ...
538 views

Grid - sizing and spacing problems with spanning cells

I am trying to set up a Grid with cells that span two rows and are centered on those rows, but I am having troubles with the sizing and, therefore, spacing of the ...
293 views

I want to use Manipulate (I am open to other alternatives) to apply one of two different functions f or ...
462 views

Loop and do operations on Matrix, then graph the results

I'm trying to do some operations to a matrix in a loop, and then I want to graph the results. The results are pair of numbers. Can I store the results of each iteration on "something" and the use ...
524 views

Splitting a list using SplitBy, by comparing adjacent elements [duplicate]

Suppose that I have the following list called mylist: mylist = {80.2, 80.3, 80.4, 327.6, 327.7, 327.8}; I would like to split ...
552 views

How can I get Mathematica to allow me to apply FindRoot to an expression that contains NIntegrate?

I am trying to run the following command in Mathematica: FindRoot[NIntegrate[D[f[x], x] / Sqrt[1 - x^2], {x, 0, 1}] - d, {a, 245}] As you might expect, a is ...
340 views

PDF exports of ArrayPlot's are fuzzy (OS X)

[The following problem occurs on OS X; I don't know if it also occurs with other OS's.] If I produce a Graphics object with ...
248 views

How to pick out the element in a list of lists which satisfies a particular condition?

I have got a list: ...
280 views

How could I get the value of y[t] at each specific interpolation point?

sol = NDSolve[{Derivative[2][y][t] + Sin[y[t]] == 0, Derivative[1][y][0] == 0, y[0] == 1}, y, {t, 0, 2}] the above-mentioned differential equations can be solved ...
186 views

Is it possible to replicate the “magic” of OptionPatterns[] with DynamicModule's local variables?

Creating richer interactive interfaces that are generated by a DynamicModule invariably requires more complex data structures and in particular, a larger argument ...
2k views

How can I plot the complex graph of $x^x$ in Mathematica? [duplicate]

Possible Duplicate: How to plot imaginary part of a function Plotting Complex Quantity Functions For example, this Wolfram Alpha query shows this graph: But it does not show the code for ...
2k views

How to handle NDSolve::ndsz problem (singularity problem)

I have 2 second order differential equations (non-linear). The physics behind them is correct. I verified the equations many times. It is a solid pendulum with a mass-spring at the end of it. Now, ...
257 views

How to output from a .NET console app to an existing Notebook in Mathematica?

I'm wondering if its possible push output from a .NET console application to an existing Notebook that is open in Mathematica. The reason I'd like this is that I want to use Mathematica as a ...
235 views

Upon opening my notebook, I must evaluate cell for code to work properly

I am new to Mathematica. Once I evaluate the cell containing the code, my Manipulate works as desired; however, if I open the file and do not evaluate the cell, the Manipulate goes haywire. Can ...
248 views

Access pairs of vectors, rather than the matrices, in partitioned data structure at a levelspec

I have some old code to analyze correlation between 2 time series by looking at windows of different lengths shifting across the time series data. The code: gets 2 sets of time series data (in ...
460 views

Simple countdown timer in Mathematica

I dug around a bit and did not find a simple and clear implementation of countdown stopwatch in Mathematica. I am looking for a function that takes as an input a certain integer and then counts down ...
382 views

This is something that should be simple, but the documentation and other questions don't seem to deal with it. I can think of mechanically doing it through a loop, but I know there must be a better ...
579 views

How to change color dynamically?

I am new to Mathematica and want to change the FillingStyle Dynamically in this Plot. I want ...
395 views

How can I regulate 'Play sound duration' in Mathematica 8

How can I regulate the time of play sound[s] - duration in Mathematica 8. I want to import and save wav file in *.nb document & manipulate (with) the sound duration, for example, select sound ...
323 views

Change elements on different positions within a list

How can I change the elements of a list, say on positions {{1, 4}, {3, 1}, {2, 3}, {4, 4}} in one go? Take this list for example: ...
334 views

Semidefinite Programming

I want to solve a numerical optimization problem using semi-definite programming. Is there a package or add-on that equips mathematica with this functionality?
166 views

How to avoid conflicts between local variable names and symbolic arguments in Block constructs?

I am using Block inside the definition of some recursive functions. If the Block definitions use short variable names, like ...
619 views

GridLines in LogPlot or LogLogPlot

Suppose I have a plot like LogLogPlot[2 x^5/3, {x,0.1,10}, GridLines->Automatic] How can I achieve to get "custom" gridlines to reduce the number of ...
741 views

Mathematica Precision

How can I set the output precision of the following statement to 10 decimal places? I was looking through the documentation, and for some reason, all I could find was ...
4k views

Importing from Excel

I'm trying to import a matrix from Excel to Mathematica. My code is: Import["desktop/stproj.xls", "xls", data, 1] The output is some weird stuff about population ...
72 views

Symbolic Output after numerical computation

I have a small question about the symbolic output. I started to write a program that generates the coordinates of n-dimensional polytopes by Wythoff construction. For crystallographic groups, all is ...
176 views

How can I speed up this code with multiple sum？

There are 4 variables in this multiple sum, therefore it may take a long time. I have run this program for 12 hours, but no result untill now. I want to know how to speed up this code. Any help or ...
143 views

Multiplicative partition function

I am trying to create a multiplicative partition function that would generate something like ...
117 views

Replacing Patterns In a List of Varying Length

I am working with an array of data that may look something like this. ...
83 views

Subtracting list from list of same dimensions [duplicate]

This might seem like a basic operation I have already searched for similar answers but found none. I want to subtract the second elements of my list ct from the corresponding element in lt, and ...
299 views

Manipulating slots in a pure function

How does one manipulate the slot numbers in a pure function? Some trick with Evaluate or Hold? I'm aiming for something along ...
100 views

Simulated Annealing Parameters and Results

I am using SimulatedAnnealing method for a simulation based optimization problem and was wondering if someone can enlighten me on the following features: Is there ...
120 views

How to open directly the help/reference window from a notebook

I'm used to do ??symbol when I want the reference for a given symbol, then I click on the >> arrows to open the help window. Would it be possible to ...
439 views

Has Mathematica a function to compute the Smith Normal Form?

The Smith normal form is a matrix that can be calculated for any matrix (not necessarily square) with integer entries. See Wikipedia for a more elaborate description. Has Mathematica a function to ...
163 views

Ugly plots when printing notebook to pdf

One image is worth one thousand words, so: Question: At what options should I be looking, so that what I see in my notebook is what I get in my printed pdf ? Here is the code I'm using: ...
157 views

Forcing Mathematica to recognize a symbol without defining it

In the Mathematica front-end, symbols that have been defined are colored black and symbols with no definition associated are colored blue. This is useful to prevent spelling mistakes. Also, defined ...
377 views

How to plot a 2D region when there are 3 free parameters?

How could I obtain the region of payments, with the parameters a,b,c,d between 0 and 1 and the sum of all equals 1? After the comment/recommendation of belisarius... I edit the original question ...
195 views

Prime factor counting function

Is there any way I can speed up this prime factor counting function? (I am looking for all numbers in a range with 3 prime factors (counted with multiplicity).) ...
41 views

Is it possible to enclose code into collapsible/expandable regions? [duplicate]

In some programming languages (e.g. C#, Visual Basic) there are language constructs that have no effect on the execution of code whatsoever, but exist solely to allow grouping fragments of code into ...
272 views

Generating a graph where vertices correspond to points in an integer lattice and edges connect points less than a threshold distance apart

I'd like to automatically generate a graph where vertices correspond to (and have the coordinates of) points in an $A \times B$ integer lattice, and a graph is generated by connected vertices within a ...
83 views

How to specify a StyleSheet of a newly programmatically-created notebook?

I would like to make a button that opens a notebook upon pressing. The point is that I would like the notebook to be made according to a specified StyleSheet. To be more specific, here is a simple ...
128 views

Dynamically show usage

As the title states I would like to dynamically show ::usage on several functions. Let's consider two functions here: ...
233 views

Simplifying expressions involving Sum

I am trying to use Mathematica to simplify a symbolic expression involving Sum. Particularly, I define a sum via ...
196 views

How do I interpolate a set of points with colour varying along the curve?

I have a table with 3 columns - x position, y-position and colour. I'd like to plot these points and join them with line segments, where the colour of the line segment is determined by 3rd variable. ...
772 views

Solving Stochastic differential equation

How do I solve the following simple stochastic differential equation: $$m x''[t] + \Gamma x'[t] + k x[t] = \sqrt[]{2 kb T/\Gamma)} \eta[t]$$ here $\eta[t]$ is brownian motion , i.e. Wiener ...
244 views

Evaluating function only when its optional argument is numeric

I want to have the argument 'a' for myf2 in form of optional argument, but at the same time I need to evaluate the function only if 'a' is Numeric, see also my previous question. ...
104 views

ToBoxes Respect Spaces Code

Is there a way to force either ToBoxes or MakeBoxes to respect the spacing that occurs in the code? For example is there a way ...
419 views

how to change the distance between tick mark and tick label

On similar lines as Is there an option to change the space/distance between tick labels and axes labels for plots? but I would like to reduce the distance between the tick mark and the tick label that ...