# All Questions

172 views

### Using Mathematica's Position Function

I have a list a = {-1, 2/3, -2 - 4 I, -2 + 7 I, 2 I} and when I use the Position[a, I] it returns ...
91 views

### None of the NMinimize methods leads to the answers of the equation

The following 10 equations has one set of exact answer using NSolve in Mathematica 9.0.0.0 (for positive c2, alpha1, alpha3, beta1, beta3, A1 and A3): ...
58 views

### Annotating output without changing the value [duplicate]

I like to annotate output, using something like the following: ...
110 views

### depicting specific element of a table (knowing its position) in different color

there is some 20 Time 20 tables, in each step we choose one element randomly. how can show this random selected element with different color?
70 views

### Getting error from CommunityGraphPlot

Situation I'd like analyse my web site with CommunityGraphPlot as follows: Step 1: Define a function to scrape the all the webpages from expected website. ...
34 views

### Specifiying values in a system of equations

Suppose I have system of equations, for example Clear[a, b, c] Reduce[{RCI7[{a, b, c}] > 0, RCI7[{b, c, a}] > 0, RCI7[{c, a, b}] > 0}, {a, b, c}] // N ...
49 views

### How can I prevent exponents from appearing in an expression?

I've found posts dealing with showing/hiding exponents for numbers, like in scientific notation. But what if I have a general expression? I have an expression like this, ...
165 views

### Animating magnetic field lines on a circle

So I want to create a changing vector as a function of theta and have it's origin stay on the path of a circle. The vector I want to plot is: ...
53 views

### Please, can someone solve this equation [closed]

Solve the equation: e^(at)+e^(a(t-T)) = 2. Please can someone help me to solve this equation. I need a in terms of t, T.
65 views