# All Questions

157 views

### BoxWhiskerChart - Displaying Frameticks Bottom and Top

Is there an easy way to display Automatically the Frameticks at the bottom and top in a BoxWhiskerChart? Currently it is only showing the numbers at the bottom. ...
301 views

### Fourier Coefficients in Mathematica [duplicate]

I'm calculating Fourier Coefficients by hand and trying to verify them in Mathematica. However, in Mathematica I get them wrong by a factor of 2. Is there some part of the Mathematica functions I'm ...
285 views

### Making a table with elements like {10i+j, i, j}

Table[10i+j,{i,4},{j,3}] will generate a table that looks like this: {{11,12,13},{21,22,23},{31,32,33},{41,42,43}} I would like ...
1k views

### How do I plot the unit normal field for a surface?

The question is pretty much in the title; I'm about to teach my multivariable calculus students about orientations on surfaces, and I would like to be able to show them pictures. Any ideas?
1k views

### Numerically solving an inhomogeneous partial differential equation

I'm trying to solve a cylindrical partial differential equation with boundary conditions. But I got an error message saying ...
190 views

### Derivative of the solutions by parameter

P0 = 0.1; K = 1000; Quiet[sol = Solve[{K*P*L == PL, P0 == P + PL, r*P0 == L + PL}, {P, L,PL}][[1]]]; complex = PL /. sol; Plot[complex, {r, 0.1, 2}] How can I ...
2k views

### Import selected columns from a tab delimited text file

I have a very huge file (1GB) from which I desire to import only the 5th column. It is a tab delimited text file with a .txt extension. Can you please help me with ...
321 views

### Good way to discriminate between Mathematica/PlayerPro/CDFPlayer

Within a Mathematica program with a graphical user interface I want to programmatically determine whether the code runs in a full Mathematica, a Player Pro or a CDF-Player. There seem to not be any ...
243 views

### Faster simplification of linear combinations of some specific functions

After some profiling I've found that my program spends most of its time in the simplification step. The program uses my simplification function many times (over different data). My calculation is not ...
187 views

### Rearrangement of the list

I have the following list: ...
221 views

### How do I Export through a standard system file save dialog activated by a Button?

As near as I can tell, Export cannot be configured through arguments or options, to present a standard system file save dialog to the user, so that he can specify a ...
573 views

### Solve an equation in $\mathbb{R}^+$

How can I solve this equation (both numerically and literally) only in the positive reals $\mathbb{R}^+$? Solve[x == (v0 - (A CD t v0^2 ρ)/(4m)) Cos[θ] t, t] And ...
832 views

291 views

### NIntegrate inside NSum

Consider the following function with a numerical integration: ...
184 views

### Plotting a dot product

From a conic equation obtained from a dot product, I want to plot its 2D graph, while being able to manipulate the variable. ...
356 views

### Graphics legend: How do I split tables into parts?

Using Jens's code: ...
413 views

### What is the correct way to conditionally add elements to lists? [duplicate]

Possible Duplicate: How to avoid returning a Null if there is no “else” condition in an If contruct I have several situations where I need to conditionally add an element to a list, at ...