# All Questions

5 views

### I am trying to solve a set of coupled differential equations with known boundary conditions using mathematica

Here are my differential equations and boundary condition. f''[x] = h^2/f[x]^3 - f[x] (1 - f[x]^2), h == (f[x])^2[Phi]'[x] f[0] = 1, f[L] = 1, where L can take values: {L,1,8} [Phi]'[0] = 0 I've ...
16 views

### Brevity of denoting Conjugate[]

How do I make Conjugate[] expressions have a bar above them instead of Conjugate[ before them, in order to shorted up expressions? I'm looking at something like this screenshot for example:
42 views

### Understanding SameQ

I am new to Mathematica. So I have read the documentation for comparing expressions in Mathematica and I still don't get the SameQ (===) function. Let me give you a short example: ...
27 views

### Long list of similar rules

Given the following: ...
19 views

### How to join datasets?

I have 3 datasets as a lsit: {dataset1,dataset2,dataset3} I want to convert them into a single dataset. The following does not work Join[{dataset1,dataset2,dataset3}] However, this works ...
30 views

### Random generation of three-non-collinear and four-non-coplanar points in 3D space

Please, take a look to this code. How it can be improved so that the time execution becomes smaller? ...
24 views

### Bar legend to Contour Plot

I have a set of 4 contour plots and I show them with the simple Show. How do I present a legend that is the same for the whole set? i.e., the scale needs to truly represent the set and not the values ...
21 views

### Generating a Variable Number of Dynamic Variables

I know questions that get at this very issue have been posed in other ways here, but as a relative beginner, I've had trouble understanding the answers. For my application, I am developing a simple ...
31 views

### What's real analogue for FromDigits?

FromDigits only works for integer strings. What's its real-number analogue?
22 views

### Variables within functions within DSolve

Hi I am just beginning to learn Mathematica and this is my first time I have been exposed to any type of coding. I am encountering a problem in a basic physics problem. For example we are always ...
12 views

### Can i change the default search paths?

When i try to load packages on this computer, i get an error (i already know the packages work). I think the issue might be to do with the fact that mathematica can't process the network drives, some ...
36 views

### How to use MemberQ for such Variables?

This is NOT the desired out come. I want this test to fail: ...
38 views

### Append plot to existing plot?

I have generated a plot from t=0->1, and I wish to append another plot from t=1->2. How can I do this? Thanks in advance.
23 views

### How can I detect certain letters by shape in an image?

I have a website where people can post Flipbook animations, called Flipnotes. Unfortunately, most of the Popular flipnotes are in the following categories: MV (Music Video) AV (Audio Video) AMV ...
10 views

### Insert an element to AdjacencyGraph

I'm not able to insert an element to mine AdjacencyGraph. I suppose that i should modify my AdjcencyMatrix: ...
26 views

### Finding the true expectation

I have the density function and I want to determine its expected value ...