0
votes
2answers
101 views

Rearranging a simple algebraic equation

Suppose I have a simple algebraic equation like: ChebyshevT[4, p] == 0 1 - 8 p^2 + 8 p^4 == 0 and I want to solve for the ...
2
votes
1answer
968 views

How to increase font-size of Text in ShowLegend

The default font-size of Legend text generated using ShowLegend[] is too small. How does one increase this? The code I am ...
4
votes
3answers
419 views

Slow image manipulation

This is some extremely simple code that shows an image and manipulates a circle (that will be used to select a region of the image to analyze). All those Dynamics ...
5
votes
1answer
508 views

how can I convert a Grid object to a Graphics object?

I have a figure (which is by combining different plots) that I generated using Grid[]. The problem is, I want to specify the ...
2
votes
2answers
578 views

How to make a Dynamic Calculator to solve a quadratic equation?

Taking my first steps in the world of Mathematica Programming. The aim of my program was to modify Wolfram's dynamic calculator (which performs an addition subtraction and a product - in response ...
1
vote
2answers
95 views

How can I plot a polynomial at a specified set of x values?

I want to plot the following polynomial: ...
3
votes
1answer
80 views

Want actual cell data from CellEvaluationFunction

Let's say I print a cell like so. CellPrint@Cell[ BoxData[" "], "Input", Evaluatable -> True, CellEvaluationFunction -> Function[Print[#];] ] Now I ...
0
votes
1answer
262 views

How can I build a GraphicsGrid of fixed size that rearranges the empty plots?

OK, let's make one final attempt; they say the third time is the lucky one! Following @rm-rf 's suggestions, I will try to be as clear as I can. My Mathematica code reads and plots simultaneously ...
4
votes
7answers
711 views

Finding the midpoints of an ordered list of numbers

Suppose that I have an ordered list of numbers. The numbers in the list may be evenly spaced, but they may not be. Here are two examples, list1 and ...
10
votes
4answers
1k views

Changing the tick labels in a BarLegend

In the following plot, the colors mean the phase, so I need to label the color bar not in integers, but in increments of $\pi$. I searched, but could not find how to change the ticks. Does anyone have ...
1
vote
1answer
134 views

Exporting XML Data

I am trying to convert a bunch of text files into structured XML files. Using string expressions I have extracted data, so I have: ...
-3
votes
1answer
360 views

import Excel sheets by name

I'm importing data from Excel. It appears that the sheet number needed in the Import statement is taken from the order that the sheets appear in the open Excel file. I need to import 2 of the sheets ...
0
votes
2answers
638 views

Plot of a function which includes numerical integrals

I want to make a 3D plot of two variable i1 and b1. The dependent variable results from a pay-off function ...
1
vote
2answers
241 views

How to know form of plotted Bezier function

Simple scenario is to see the Bezier function, but how to know which polynomial approximate it? ...
5
votes
1answer
183 views

Manipulate keeps updating due to a function

Edit: This is apparently only a problem on a mac running OSX. I am trying to use the 'stretchText' function by Jens. But when I use it in manipulate, the output keeps updating without changing ...
4
votes
3answers
237 views

Better code to solve number puzzle [duplicate]

Question: (34 O 5 O 6 O 8 O 9 O 1) O 2=2008 Replace the Symbol of "O" to "+" or "-" or "*",and make the expression is true. My solution: ...
2
votes
2answers
404 views

How can I build a GraphicsGrid of arbitrary size?

This is actually a very simple scenario, in order to make simpler this question Part I. Consider the following piece of Mathematica code ...
3
votes
1answer
193 views

What is the correct way to use Compiled function in Table and Plot without slow down?

On V 9.01 on windows 7, all 64 bit. I am sure I am missing something simple here, but I used all the tricks of the trade that I know about, and read docs, and do not see anything that helps. Here is ...
3
votes
4answers
232 views

Test whether date is in a certain period

I have one table which contains time periods ("start" and "end") and a "type" for every ...
8
votes
1answer
184 views

Where is my memory? — LibraryLink never returns the memory

This is an example LibaryLink code from Mathematica documentation, which takes an integer and return an integer list: ...
3
votes
1answer
110 views

How to make InverseFunction work on function defined with restriction on arguments

This example works to define InverseFunction on the first argument of a function ...
2
votes
1answer
269 views

NMaximize and Conditional Loop

I have developed the following code that simulates a process that decays over time and then returns to its initial state periodically. When I pass a list of random integers in the interval $(1,0)$ as ...
4
votes
3answers
221 views

Displaying a small histogram overlay on a large image

I needed to overlay a small histogram onto a large image, specifically in the bottom right hand corner. However, I could not do this in an intuitive and computationally cheap fashion due to ...
6
votes
0answers
62 views

Is there a way to get BSplineFunction beyond MachinePrecision?

I have been using BSplineFunction (Mathematica 8) to generate a smooth representation of some data, which I might then do some further processing on. As I ...
2
votes
1answer
115 views

WholeCellGroupOpener and Hyperlinks

My problem is: I would like to activate WholeCellGroupOpener on a cell containing hyperlinks. But when I do that, the hyperlinks are no longer active. Is there a way to change the order of the two, so ...
2
votes
1answer
1k views

Epilog->Text placement on LogLogPlot

Hopefully this is a simple question. I'm trying to overlay some text on top of a LogLogPlot using Epilog and ...
1
vote
2answers
101 views

Making two lists which share part of its name, while its name is also an element of the list

I am stalled with the following problem: I want two lists, for example: name={1,2,3} and namec={{1,2,3},{x,y,z},name} The ...
1
vote
0answers
34 views

How can I convert a list to an expression? [duplicate]

For example, I have the following list: {x1,op1,x2,op2,x3,op3,...} And I would like to convert the list to the following expression: x1 op1 x2 op2 x3 op3 ...
2
votes
1answer
231 views

Inverse on a restricted domain

I have a function, whose domain is [0,1]. The function is f = Piecewise[{{Exp[-β * (-Log[#])^α], 0 < # <= 1}}, #]& with ...
4
votes
0answers
342 views

Ugly font rendering (ubuntu 12, overrides system settings)

Mathematica 9 on Ubuntu 12 renders fonts very poorly. Text is readable, but it makes it very hard to concentrate on programming. Since smoothing on Ubuntu on low DPI screens isn't very good either, ...
5
votes
2answers
182 views

Split a list of pairs at points with decreasing first element

I have a list in which the first index is mostly increasing, but dips sometimes. I need to split this list in two or more lists in this way: when the first element of a pair is smaller than the ...
1
vote
2answers
318 views

How to plot results of Dsolve

I could not figure out how to get a plot of the results of my coupled differential equations. I am sure that the equations are written correctly. I tried solving a basic Lotka Volterra set of ...
4
votes
2answers
218 views

Getting a usable expression tree

I need to get the expression tree for some expression. expr //TreeForm The above grabs the expression tree but it isn't in some sort of usable format. Just an ...
2
votes
2answers
175 views

ListDensityPlot controlling the number of colors

Is there a way to set the number of colors used in ListDensityPlot. I am using "Rainbow" as follows: ...
19
votes
2answers
519 views

Have I found a bug in Integrate?

The following command gives 0 in Mathematica 9.0.1. ...
1
vote
2answers
240 views

Is this integration error from a misuse of Mathematica or is it my poor math skills?

I have input this: Integrate[1, f[t]*Exp[(v/V)*t]] That is $\large\int 1*d(f(t)*e^{\frac{v}{V}*t})$ I expected this output: $\large f(t)*e^{\frac{v}{V}*t} + C$ ...
1
vote
2answers
401 views

Collatz Tool Box — any speed ups possible?

I have created a tool box for experimenting with the Collatz conjecture. Info here: Wolfram MathWorld and here: Wikipedia The patterns I have found allow us to make the conjecture jump through some ...
2
votes
2answers
443 views

How to export a table of complex numbers?

I'm having problems exporting a table of complex numbers. I have: ...
0
votes
1answer
282 views

Find root of a function defined as a Module

I have a simple module like BCdet[x_, y_] := Module[ {AuxMat}, AuxMat = Mat /. {f -> x, A -> y}; Det[AuxMat] ] where ...
14
votes
6answers
581 views

How can I suppress rotation of 3D graphics?

Given a 3D image built of a combination several Graphics3D objects, is it possible to suppress rotation of the displayed image by the mouse? To be specific, here ...
1
vote
1answer
213 views
15
votes
0answers
131 views

How to keep the ctrl+shift+k help menu remain in display while typing?

In Mathematica 9, one can type ctrl+shift+k to display menu which has all the possible signatures/definitions for the function or command in question. One can ...
9
votes
2answers
146 views

Color Blend in BezierCurve

How can I color a BezierCurve from Red into Green just as ...
1
vote
1answer
184 views

Construct an infinte matrix with finite sub-matrices

How can I construct an infinite matrix with finite sub-matrices of the form A = (B0, 0, B1 0, B2, 0 0, 0, B3) where each Bi is a rectangular or a ...
17
votes
2answers
415 views

What are all the named Mathematica styles?

This question came to mind because of this answer to a recent question. Under Style, the Mathematica Documentation Center says the following about named styles. A few common named styles ...
4
votes
2answers
133 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 ...
4
votes
1answer
374 views

Unexpected behavior: CForm converts rationals to floating numbers

One line question: How to make CForm[1/2] generate 1/2 instead of 0.5? (Thanks Nasser's ...
0
votes
2answers
264 views

How to change the LabelStyle only for one axis?

I want to modify the style of just one axis, but I'm stuck with something like Plot[x^2, {x, 0, 3}, LabelStyle -> Red] which of course modifies both axes. How ...
1
vote
1answer
138 views

Spelling dictionary corrupted

I have a problem with the Check Spelling in Mathematica, that I quite don't understand: If I try to use the Check Spelling on any notebook, the check just stop before the first word and in the field ...
2
votes
1answer
170 views

A question about derivatives (cubics)

Given an equation: f(z) = a (x + I y)^3 + b (x + I y)^2 + c (x + i y) + d Which can be re-written as: ...

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