3
votes
2answers
250 views

How to set font color for display formula to be same as the cell in which the display formula resides?

I have a stylesheet that works as expected in Mathematica 8. It does not work as expected in Mathematica 9. In the stylesheet I have set FontColor to ...
6
votes
4answers
255 views

How to sum over duplicates?

I have a list of the form: {{1, 0, 1}, {2, 1, 2}, {1, 0, 3}, {2, 4, 2}, {2, 1, -1}, {1, 0 ,0}} that I would like to sort such that I calculate the sum over the ...
-1
votes
1answer
316 views

Importing Quicken Tab Delimited .*TXT File and plotting

I am using Mathematica 7 to try and plot my quicken data file. I have exported my quicken file as a .*TXT and have made zero changes to it. I want to do a ...
5
votes
1answer
137 views

How can selection of delimiter matches be disabled?

I often preemptively match delimiters. As a simple example, I'll type Import[], then left arrow, then "filename". The problem ...
3
votes
0answers
160 views

How to print preview a selection?

When printing (file->print...) there's the possibility of printing just the current selection. This is useful for printing just a couple of cells, or some chapters. The file menu also has Print ...
3
votes
3answers
388 views

How to insert a link to a generic file, in the middle of a text style cell/paragraph?

It is easy to insert a Hyperlink to a notebook file, or to an internet address, in the middle of a text style cell (Ctrl+Shift+H or menu: Insert->hyperlink). Trying to create a hyperlink to a file ...
20
votes
1answer
192 views

Why Trace[] shows some internal warnings on a standard Plot command in V9?

For fun, I like to use Trace with option TraceInternal->True to see if I figure how some of the commands work internally. I ...
8
votes
0answers
184 views

Break[] inside ColorFunction

f[x_?NumericQ]:= (Do[Break[],{i,1,2}];x) Plot[x,{x,0,1},ColorFunction->(ColorData["Rainbow"][f[#]]&)] Break::nofwd: No enclosing For, While, or Do found ...
109
votes
5answers
7k views

Are you interested in purchasing David Wagner's “Power programming with Mathematica”?

I recently contacted McGraw-Hill to see if they have a mechanism in place for printing out-of-print books that are still of interest. Specifically, I asked about "Power programming with Mathematica" ...
8
votes
1answer
1k views

Logarithmic scale in the legend of a ListContourPlot

Is there a way to use a logarithmic scale in the colour legend of a ListContourPlot? The contours can be logged by taking the ...
4
votes
2answers
254 views

How can I superimpose points or disks on an image at specified coordinates?

I have a TIFF image of 640 x 640 pixels, over which I would like to plot a list of points or disks of small radius. I have been testing different alternatives and I found ImageCompose command. ...
14
votes
2answers
567 views

Combining 3 graphics of different coordinate systems

I have 3 graphics in different coordinate systems and I want to join them in as in the following figure. This is just a sample figure, not the real one. My functions are as follows. ...
4
votes
2answers
224 views

About extension fibonacci

I have been trying to solve this problem, it worked slow. I know there is a efficiently way. How do I get it? The following is my code: ...
1
vote
1answer
126 views

Changing the number of locators with SetterBar

Typically when adding locators I would use a button i.e. something along the lines ...
1
vote
2answers
193 views

Filling for ListPolarPlot

I want to use Filling for ListPolarPlot in such a way that the points in the list are joined to the origin with a line colored ...
1
vote
2answers
214 views

While-Loop Linear Projection

I'm would like to do a linear progression for a recursive relation of a consumption function. Combining my program skills and my sparse knowledge of mathematica, I was thinking about doing it in a ...
14
votes
3answers
668 views

Best Practice to write ::usage for own package functions

I'm writing an own package with Mathematica, that I would like to make available for others. In order to do that (and for my own usage of the package), I would like to write ...
17
votes
1answer
206 views

Open and search Documentation-Center

In notebooks you can press F1 (or Shift+F1 for a new window) to: open the help page of the marked Symbol or the Symbol under ...
16
votes
1answer
417 views

Simulating Theatre puzzle

I have been trying to simulate the process of the theatre puzzle from the Joy of X (Strogatz). The puzzle, and some relevant material are here. My simplistic coding for this process follows: ...
0
votes
1answer
112 views

Non solutions returned by NSolve. And why does it return both phi and Cos[phi]?

Similarly to this thread NSolve gives additional solutions that don't satisfy the equations! NSolve returns "spurious" solutions, even increasing the working precision ...
18
votes
7answers
544 views

How do I obtain an intersection of two or more list of lists conditioned on the first element of each sub-list?

Given two lists like list1 = {{1, 1}, {2, 4}, {3, 9}, {4, 16}}; list2 = {{2, 6}, {3, 9}, {4, 12}, {5, 15}}; I would like to produce an output like ...
30
votes
4answers
2k views

Are Mathematica 9 units really slow?

This generates 75 unitized pairs for a plot that displays physical units: ...
2
votes
0answers
260 views

FindRoot - Speed and errors

I am using FindRoot[] to solve a complicated equation. It seems I get the correct answer even though I get errors about an ...
9
votes
3answers
3k views

Find all roots of an interpolating function (solution to a differential equation)

I'm trying to find all the roots of the solution to a differential equation. Using NSolve or Reduce I don't get the roots, so I'm using an iterative method which I found in physicsforums.com. This ...
9
votes
2answers
258 views

How to partition a list and leave in the last sublist which is of different length? [duplicate]

How to partition a list and leave in the last sublist which is of different length? In[75]:= Partition[{1,2,3,4,5},2] Out[75]= {{1,2},{3,4}} I want it to be ...
4
votes
6answers
207 views

Filter list with different list in it

I have a list like: {{{4, 14}, 1}, {{4, 15}, 1}, {{4, 16}, 1}, {{4, 17}, 1}, {{4, 18}, 1}, {{4, 14}, 3}, {4,15}, {{4, 16}, 2},{4,18}} Now I want to ...
3
votes
3answers
631 views

Solving Integrals

Here's a problem that I don't understand. f[x_] := Exp[Cos[3*x]] g[x_] := (1/3)*x^3 - x^2 + 2 When I try to find the limit: ...
21
votes
3answers
926 views

RegionPlot3D in cylindrical or spherical coordinates?

RegionPlot3D is awesome. Unfortunately, it appears to work only for Cartesian coordinates. While there are ways to draw surfaces in spherical or cylindrical coordinates, I can't find a way to draw ...
11
votes
3answers
1k views

How can I convert a complex number a+b I to the exponent form A Exp(I phi)?

When I have an expression such as: (1/4 + I/4) ((1 - 2 I) x + Sqrt[3] y) it is hard to get an intuition of the number. So I want to convert it to the complex ...
13
votes
4answers
2k views

How to draw a great circle on a sphere?

I apologize for the text description, but new users are not allowed to post images. I want to draw a circle that cuts through the center of a sphere and has an inclination of 15 degrees with the ...
9
votes
1answer
88 views

Different behaviour of ValueQ inside and outside of a loop

I need to store a rather big number of variables and I tried to do that by storing each variable as Z[n] with varying n. I guess this was not my best idea. The first problem I encountered is when I ...
2
votes
2answers
480 views

Spreading colors in ListContourPlot

I have a data file with triplets. The first two numbers indicate the x and y position, while the third one is the log10 value of a particular indicator. I want to create a 2D plot in which the ...
2
votes
2answers
812 views

How to prepare data for ListVectorPlot[]?

I was trying to plot a few velocity vectors measured at given points. However I am unable to do this with ListVectorPlot[] function. I get error each time I try to ...
10
votes
1answer
342 views

user defined functions, how to save them for future use?

I need certain user defined functions over and over. I was wondering how can I define and where and how to save them such that each time I start a notebook, these functions are available and need not ...
3
votes
1answer
123 views

How to make a pattern to change x^(2/y) to (x^2)^(1/y) for any x and y?

This might have been asked before. Please let me know if it is. I was looking at an interesting Mathematica question in students forum and trying to solve it, and a chance to learn more about ...
0
votes
1answer
1k views

Loops and subroutines [duplicate]

Possible Duplicate: Alternatives to procedural loops and iterating over lists in Mathematica I am new to Mathematica and not familiar with functional programming. In particular, I have no ...
8
votes
2answers
320 views

Tailoring RegionPlot3D with PlotPoints?

This seemingly tame solid gives Mathematica (v9) a bit of a workout if you want to generate a good picture: ...
14
votes
1answer
833 views

Sales forecast using SARIMAProcess and time-series data

I would like to ask for help in how to use the new Mathematica 9 time series functions to make some sales forecast. For example, for one of our stores, I have this data set with 35 points, from ...
2
votes
0answers
96 views

Why cant Mathematica solve this equation? [duplicate]

Possible Duplicate: Can Reduce *really* not solve for x here? Why cant Mathematica solve this equation? ...
19
votes
2answers
789 views

How to generate a picture like this?

How to generate a picture like this? I'd like the surface of the manifold to randomly distort.
1
vote
1answer
324 views

How to extract Solve results as variables [duplicate]

Possible Duplicate: Assign the results from a Solve to variable(s) In the following example: ...
12
votes
4answers
1k views

how to differentiate formally?

I have been wrapping my head around this for a while now and I have not found a solution so far. I want to work with an arbitrary number of variables in mathematica and use some built in functions. ...
0
votes
1answer
192 views

Iterative Function Mapping [duplicate]

Possible Duplicate: How to nest my own “times” function to get powers What I want to do is something like : Sin[...Sin[Sin[Sin[Sin[x]]]]] Basically, ...
1
vote
1answer
103 views

Draw from HistogramDistribution with ParallelTable

I wanted to check something, but ran into troubles using HistogramDistribution in combination with ParallelTable. The code does the following: Compute a HistogramDistribution of some sample and use ...
5
votes
1answer
248 views

Making the TableForm output into two columns

I have a program that calculates Christoffel symbols for a given metric, and the output I'm getting now is such that I have every calculated symbol in one column like this: I'd like that I could ...
3
votes
2answers
164 views

Subscript and Part: What's going on in this example?

Example I came across the following simple example from A Beginner's Guide to Mathematica, by McMahon and Topa, which I believe was written circa version 5.2. (FWIW, I'm using v9.) ...
3
votes
1answer
2k views

Remove annoying Conjugate

Here is an expression ...
0
votes
0answers
69 views

Extracting box coordinates [duplicate]

Possible Duplicate: Dimensions of the results of Text[] within Graphics[] In writing the following code, I had to figure out what values to give d by trial and error. Is there a way to ...
3
votes
1answer
407 views

How can I express an algebraic expression as a product?

I have a simply expression that I can see that I can express as a product. ...
1
vote
1answer
202 views

Symbolic calculation

Is there any software where this kind of symbolic calculation is possible? s = 0 for i = 1 to m j = 2 i + a - t if (j > 0) s = s + a I want s as a ...

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