# All Questions

84 views

### List Manipulation and Removing Cases

I've imported a large data set, manually removing headers in the .rtf file where it originates. However, when I import this data, I receive this output: ...
82 views

### Integrate with Subscript: does this crash your kernel too?

I encountered some strange behaviour running v10.0.1 on a Mac Pro, while working with Integrate and Subscript. Starting from a ...
891 views

### Plotting a contour line in 2d on a 3d surface

I have a list of data which I can plot as a surface with ListPlot3D. Moreover I have a set of other surfaces and I have plotted the projection of their intersection ...
141 views

### Why does this happen with FullSimplify? [duplicate]

It is stated at the Wolfram Documentation Center (FullSimplify/Possible Issues) that: Why and when this could happen? How to avoid it? Any patterns? Edit: As pointed out in the comments, this ...
252 views

### Colorizing thresholded images with different colors

I am switching from IDL (from exelis) to Mathematica and want to do the following: thersholding a image (all values above a certain threshold are set 1, the rest is 0 ) colorizing the thresholded ...
229 views

### Decomposition of a semialgebraic set into connected components

Is there any built-in function for doing decomposition of a semialgebraic set into connected components? The only way I now can think of is to use ...
171 views

### Seeking simple function in interval

I am a bit rusty, and struggling to solve this problem. Looking for a simple, well behaved parametric function f[t], from [0,1] to [0,1] such that: f[0] = f0; f[1] = f1; f'[1] = ff1; where -1<= ...
182 views

### Using grids in manipulate

I have a few questions. Here is the code so far: ...
139 views

### Why this region is bad?

I want to draw a region but the result of Mathematica is not good. Why? ...
360 views

### How to enforce mathematica to analytically evaluate roots?

I am interested in simplifying expressions involving HeavisideTheta. A simple example could be: HeavisideTheta[1 + x - x^2 + x^3] The best I can achieve is with ...
27 views

### Filling not working when function in SetDelay [duplicate]

I want to use Plot with a SetDelay. Then Filling does not work. In the following, the first works, the second does not. I would like to get the second to work: ...
239 views

### Trouble with Position[] [duplicate]

I am in trouble with Position, Although my example works as expected it throws a warning. Position[{{a,b},{a,c},{a,b}}, _?(#[[2]]==b&), {1}] During ...
284 views

### Difference between Evaluation>>Quit Kernel and Quit[]

What is the difference between Evaluation >> QuitKernel and Quit[]? Both seem to quit the kernel (and clearing all ...
51 views

### Simulating from Custom Function

I am going through an old research paper and I am stuck in one area of the coding. I'll spare you with most of the details but the function I want to simulate from is a complicated multivariate beta ...
237 views

### Best way to create symmetric matrices with block structure and additional symmetries of the submatrices

Update: you can now skip the "My attempted solution" part and jump to "My first attempt for improvement" in the end of the question. My question is related to Best way to create symmetric matrices . ...
110 views

### How should i correct this error?

Sn = Sum[1/((k + 1)^2), {k, 1, n}] SSn = Sum[Sn*Fibonacci[n], {n, 0, m}] Limit[(1/(Fibonacci[m + 2] - 1))*SSn, m -> Infinity] Limit::ztest1: Unable to ...
376 views

### How to code around known MMa special-case failures?

Fourier Analysis and Signal Processing often require these integrals on functions f[x] that won't be known in advance. ...
260 views

### ImportString JSON possible bug

My problem is when I catch up some json output of whatever method and process it with ImportString[%, "JSON"], The first time ...