4
votes
2answers
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. ...
4
votes
3answers
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 ...
4
votes
4answers
293 views

Manipulate with explicit updates

I want to use Manipulate (I am open to other alternatives) to apply one of two different functions f or ...
4
votes
2answers
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 ...
4
votes
1answer
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 ...
4
votes
1answer
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 ...
4
votes
2answers
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 ...
4
votes
3answers
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 ...
4
votes
3answers
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 ...
4
votes
3answers
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 ...
4
votes
2answers
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, ...
4
votes
1answer
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 ...
4
votes
1answer
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 ...
4
votes
2answers
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 ...
4
votes
1answer
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 ...
4
votes
3answers
382 views

Adding Lists Together

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 ...
4
votes
4answers
579 views

How to change color dynamically?

I am new to Mathematica and want to change the FillingStyle Dynamically in this Plot. I want ...
4
votes
1answer
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 ...
4
votes
1answer
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: ...
4
votes
0answers
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?
4
votes
1answer
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 ...
4
votes
2answers
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 ...
4
votes
4answers
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 ...
4
votes
2answers
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 ...
3
votes
1answer
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 ...
3
votes
1answer
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 ...
3
votes
2answers
143 views

Multiplicative partition function

I am trying to create a multiplicative partition function that would generate something like ...
3
votes
2answers
117 views

Replacing Patterns In a List of Varying Length

I am working with an array of data that may look something like this. ...
3
votes
4answers
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 ...
3
votes
2answers
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 ...
3
votes
0answers
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 ...
3
votes
2answers
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 ...
3
votes
2answers
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 ...
3
votes
1answer
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: ...
3
votes
1answer
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 ...
3
votes
5answers
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 ...
3
votes
3answers
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).) ...
3
votes
0answers
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 ...
3
votes
3answers
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 ...
3
votes
2answers
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 ...
3
votes
2answers
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: ...
3
votes
2answers
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 ...
3
votes
2answers
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. ...
3
votes
2answers
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 ...
3
votes
1answer
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. ...
3
votes
2answers
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 ...
3
votes
2answers
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 ...
3
votes
1answer
210 views

Using MatrixPlot, how can I dynamically zoom in and out with my mouse? [duplicate]

I have a MatrixPlot output which I would like to zoom around in, drawing boxes that define a zoom region with my mouse. These things are all fairly standard in Labview... surely Mathematica must have ...
3
votes
2answers
308 views

What is the default ColorFunction for 3D plots?

This should be a really simple question, but it isn't in the documentation for some perverse reason. I like the default ColorFunction that Mathematica uses for ...

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