# All Questions

122 views

### How can define a set of nested parameters

I would like to know how I to define a function with a nested set of parameters (or whatever you would like to call it). For example, how would I get the following function ...
144 views

### How to collect q[t] from the following integration

As shown in the following program, the q[t] in a can be collected from the integration by defining the integration of ...
218 views

### Calculating the Mean of a Truncated Multinormal Distribution

First, I'm a little disappointed that Mathematica balks at: Mean[TruncatedDistribution[{{0, Infinity}},MultinormalDistribution[{0}, {{1}}]]] Second, is the ...
200 views

### Symbolically associate vectors and their norms

I am wondering how to handle the following situation: I do have vectors of known dimension that I would like to handle symbolically. I suppose I can do something like ...
80 views

### How to automatically load package in Player Pro by making backup files of init.m?

I dont know whether I am asking the right question or not but I am curious to know whether we can automatically load the package in ...
150 views

I have made a package BeginPackage["top`"] t[x_]:=MessageDialog["This is top"] t1[x_]:=MessageDialog["This is top1"] EndPackage[] and used the code of this ...
188 views

### How can Time be made to go backwards?

I would like to make a countdown timer, but cannot find a reliable method to make the DateList[] function reverse. The not so robust code for the Digital Clock with the display of seconds follows: ...
257 views

### solving for one solution to a system of polynomials

I'm trying to solve a system of equations: ...
147 views

### Backward compatibility issues while DumpSaving Interpolation polynomials

I have bkwrd compatibility issues when I save my NDSolve result (which is an interpolating polynomia) using DumpSave from Mathematica 8 on Windows 7 and then try ...
274 views

### Compatibility of Mathematica Notebooks written on Mac with Windows

I wrote a notebook on Mac OS 10.7.4 and run it on Windows XP at work. On my Mac I use a full version of Mathematia 8.0.1.0, whereas on the Windows-system only a trial version (Version 8.0.4.0.). ...
874 views

### How to write values of function to file?

For example, say I wanted to plot Sin(x) like this: Plot[Sin[x],{x,0,2 Pi}] But instead of plotting to a graph, I want to now tabulate the values of Sin[x] to a ...
272 views

### Exporting Animations under Duration constraints to view on an iPad

I would like to show some eye-movements datas as animation on an iPad. That is to see the gazes as they occured as a function of time. Ideally We would only see the Graphics objects, not the ...
1k views

### Mathematica slope fields

I would like to make a slope field. Here is the code ...
176 views

### NIntegrate is resetting my variables and not giving me a result?

I am trying to check if mass conservation holds by integrating the area under a curve but to no avail. ...
275 views

### Locators and Table within a Manipulate are not behaving

I am putting together a Manipulate on vector addition for my intro physics class and everything works well except when I include a Graphics that has a Table within. The code is below. There are three ...
98 views

### is there an equivalent of “show” steps? [duplicate]

Possible Duplicate: Get a “step by step” evaluation in Mathematica In wolfram alpha, when preforming for complicated integrals there's a 'show steps' option that explains how ...
63 views

### BindEvent binding own function

I need to change property of window when button gets pressed. There are pretty enough examples on Wolfram's website, but all they bind predefined function "Print[]" and I have no problems with ...
58 views

### Explicit, closed formula for recursive integral as a function of the recursive parameter

This is a follow-up of this question/answer. I'm working on a recursive integral more complicated than the one on the linked question, but this one can be used as an example. I would like to obtain ...
192 views

### How do I determine the maximum value for a polynomial, given a range of x values?

I need to determine the maximum value for y = a x^2 + b x + c, where I know the coefficients and the upper and lower x values. ...
28 views

### How do I plot cities on a Map? [duplicate]

Right now, I have the 20 cities with the most population in the world, given by the lines of code ...
55 views

### Select parts of Input Cell

One of my cells contains some Text and Input: some text 3+5, so the expression underlying this looks like ...
62 views

### fourier issue arising from input miscommunication

xdomain = Table[i , {i, -10, 10, .1}]; ListPlot[InverseFourier[ Fourier[E^-#^2 & /@ xdomain]*E^#^2 & /@ xdomain]] So I want to numerically fourier ...
77 views

### Convolution of a denstity function having a point mass with itself

My density function is as follows: ...
42 views

### Parameter sensitivities of ParametricNDSolveValue involving numerical function

This is a followup of my former question from here. Consider the code ...
71 views

### While loop not breaking when condition is met

I am having trouble with the while loop not breaking, ...
84 views

### Notation for implicit derivative

Consider the following line of code: D[x == y^3 + x y, x, NonConstants -> y] The output would be: ...
252 views

### Classification of a linear system of equations with a parameter

I need to get every possible value of k that returns infinite number of solutions or no solution to this system: ...
182 views

### Ellipsoid in spherical cordinates

I am trying to plot in spherical coordinates the ellipsoid defined as $$(x/3a)^2+(y/2a)^2+(z/4c)^2=1$$ This is my code: ...
210 views

### How to solve system of integral equations

I have two integral equations ...
77 views

145 views

### Plotting function with Dynamic parameter

I'm trying to get this code working: a = 2; func[t_] := Dynamic[t + a]; Plot[func[t], {t, -5, 5}] The idea is: I'd like to have the dynamic parameter a change ...
148 views

### problems with NDSolve

I'm having some troubles with Mathematica, I hope you could give me some hints in how to solve them. I'm trying to solve a system of coupled differential equations using NDSolve (the renormalization ...
119 views

### How to create a distributive function in Mathematica

More specifically, I would like to define an algebra such that: f[x1 op1 x2 op2 x3,...]=f[x1] op1 f[x2] op2 f[x3]... I know of the Distribute function but the problem I get into is that the function ...
108 views

### Choose the use of vertical bar indicate absolute value

Choose the use of vertical bar in DisplayFormula cell Sometimes, I use vertical bar directly via typing "|", and sometimes I typed Esc l+ Esc which like the ...
108 views

### Extracting values

I have imported a data from an excel sheet. I want to extract parts of the list based on some conditions. First I want to create one list whit the The Coca-Cola ...
117 views

### Filling from Gridline to edge of plot

Hi I would simply like to fill in the region from a vertical gridline to the right boundry of the plot Here is an example ...
155 views

### Problem with ListVectorPlot3D

I am trying to make a vector plot (3D or 2D) of the following list of 3 vectors. I simply failed to comprehend why I keep getting an error. Neither ListVectorPlot3D ...
202 views

### Fit implicit function

Can anyone help me with fitting an implicit function to data? The function is given by: a*x^2 + 2*b*x*y + c*y^2 = e under the condition ...
267 views

### How could I define a function as the solution of equations in Mathematica?

I have posed a specific question yesterday but it may be too trivial to answer. I think the question could be asked in a more general way so it is easier to answer. Then I could solve the original ...
113 views

### Non linear constrained interger Optimization

I need to maximize the equation below which is subjected to some nonlinear constraints Maximize hsum + isum + jsum + ksum + lsum + msum + nsum + osum ...
88 views

### Stopping- threshold and stopping- time of stochastic processes.

Rod Lm helped me to generate the following code, which I want to extend a little bit. So my intention is to use the threshold (the green line) as boundary in the following way: as soon as the process ...