# All Questions

58 views

### LogLinearPlot analog for Plot3D? [duplicate]

Is it possible to make 3D plot in logarithmic coordinates? I need analog LogLinearPlot to plot 3D figure in logarithmic x, or y, or both coordinates.
264 views

### find where 3 inequalities are simultaneously greater than zero

I have 3 functions: f11[l], f12[l] and f13[l], and I would like to know for which values of ...
99 views

### Tough Inverse Fourier Integral: why does the sign matter?

I'm computing the Inverse Fourier Integral of ((a^2 + omega ^2) c^2) /((b^2 + omega^2) ((r^2 + omega^2 - omegaInt^2)^2 + (2 omegaInt r)^2)) ...
218 views

### Apply a Function Pairwise

I'm new to Mathematica I'd like to apply Mean pairwise to a list to achieve the following. ...
437 views

### Track object movement

Referring to this link I happen to realize that actually the trace being projected is dependent on an equation and not on disk or circle. Though I was presuming that it is getting traced because of ...
245 views

### How can I give graph required data with GUI?

Consider that I have the simple graph of ...
708 views

### financial data behind Wolfram|Alpha and Finance Platform

I need to price 23,000 securities from 1999 to 2007, and they are surprisingly hard to find on subscription-based services, like Bloomberg LP, ThomsonReuters or S&P CapitalIQ offerings. Probably ...
866 views

### 3D orbits and inaccuracy over time

I wrote a little program to use Newton's Law of Universal Gravitation to animate 3 planets orbiting a central star, but I have run into a problem. Here is the code that I used to create the program (I ...
1k views

### How to draw some 2D curves in a 3D plot? [duplicate]

I want to plot several 2D curves (Sin[x] at y=0, Cos[x] at ...
553 views

### DumpSave for the forgetful

A few weeks ago I created a big matrix, and in order not to have to recreate it, I stored it using DumpSave["file.mx", variable]. Now I want to read it back in and ...
338 views

### Prandtl-Meyer function

I'm trying to solve for Mach number based on the given Prandtl-Meyer function, however I keep getting odd error. Here is my code: ...
373 views

### Mass Symbolic Manipulation with Subscripts? (from plaintext Input)

The simplest example of the change being sought is a greek letter, typed in as plaintext nu, and its may be replaced by the symbol, ν: expr = 3nu*kx*ky+ ...
327 views

### Convert Graph to Graphics

In Mathematica 9, a graph is returned as an object with head Graph: In[8]:= CompleteGraph[8] // Head Out[8]= Graph ...
191 views

### How to simplify the complex result with trig-abs-sqrt obtained related with Cosine symbolic Matrix of EulerAngles

Here in X-convention Extrinsic ...
53 views

### Unable to copy/paste CDF embed code in Ubuntu

I tried this question in superuser but no luck, maybe somebody here knows what is going on... Mathematica offers export to a format they call Computed Document Format (CDF) - it is basically a player ...
396 views

### How to adjust parameters to experimental data on a NDSolve problem

I have 2 differential equations with 2 variables, x and y,which are a function of t and I have the parameters k1, k2 y k3. ...
219 views

### Simulating a Stochastic Process within certain bounds

I would like to simulate paths of a Geometric Brownian Motion till it hits one of two barriers, say 10 or 200. ...
151 views

### How to send a function definition to MathLink from C/C++?

In this tutorial some MathLink concepts are introduced. At page 33 in the last lines the author is talking about sending to MathLink a function definition like ...
2k views

### How do I draw a hemisphere?

I want to draw a solid or partially transparent hemisphere above a partially transparent cuboid object in Graphics3D. However, I do not know how to do this s.t. only half the sphere is drawn. Here's ...
336 views

### Cannot call custom function loaded from script using C/C++ MathLink

I am using MathLink with C/C++ on a Unix system in order to call a Mathematica (version 9) function and get the result. The function I need to call is a personal function of mine ...
151 views

### Why ImportString[ExportString[, “PDF”], “PDF”] sometimes gives an extra point

Consider this code: ...
219 views

### Problem in reading data from a text file with two variables

I want to read in a data file, test.txt, in Mathematica. The file has the following content: ...
320 views

### Find the position of a string element, knowing only part of the string

I have a list, e.g.: list = {1, 2, 3, "Element 1", 4, 5, "Element 2", "Something else 1", "etcetera"} Now, I want all elements starting with ...
114 views

137 views

### Conditionals slower than operators?

I want to make my application faster. I tried to replace an If condition with operators. The If condition is ...
198 views

### Mismatch between Axes -> True and Frame ->True

Using Axes -> True of the following........ ...
1k views

### How to find major color in a picture?

I want to find the major color (the color which appears most often) in a picture and do some analysis later. For example, if I have this picture: What I want to do is find out that gray, red, ...