# All Questions

4answers
462 views

### How can I fill a curve in ParametricPlot3D?

I'd like to fill a curve in a ParametricPlot3D in the same way as I might with ListPointPlot3D; i.e., ...
5answers
340 views

### Translating MATLAB's cell2mat into Mathematica

How I can define a function in Mathematica such that it acts same as the cell2mat command in MATLAB? Example (in MATLAB): ...
3answers
215 views

### Fitting data without an equation

Let's say I have some data generated by anything. For practical sake, let's say I was able to generate a sequence of numbers through a recursion and I listed them out through a table of numbers. ...
2answers
151 views

### Extracting Reduce results

I'm solving a Diophantine equation inside of a function using Reduce but I'm having trouble extracting the necessary parts of the answer. For example, if my input ...
2answers
238 views

### How do I divide the columns of a matrix by the sum of its elements?

I am trying to create a transition matrix for a network. In order to do this, I need to sum down the column (the out degree), and then divide the column by the out degree in order to normalize it. ...
1answer
116 views

2answers
350 views

### How can I compile this function

I want to simplify my function f1 to f2, but f2 can't be compiled. How can I make it ...
0answers
54 views

### Non-preemptive evaluation of a dynamic function? [duplicate]

I want to monitor a long calculation that is triggered by the release of a Slider. While one can indicate running calculations when the main evaluation loop is ...
2answers
110 views

### ListPlot of lists with specified x coordinate

I want to do: ListPlot[{{x1, y1}, {x2, y2}, ...}] each y being not a number but a list of numbers. I tried: ...
3answers
232 views

### Matrix Determinant

I have an N by N (N>3) matrix generated from fortran. I would like to find determinant of that matrix using mathematica? I could do this for a 3 by 3 matrix. I can also import the fortran output file ...
3answers
1k views

### Creating a 2D meshing algorithm in Mathematica

As what is proving to be a difficult, but entertaining task, I am attempting to adapt a 2D meshing algorithm created for MATLAB and port it to Mathematica. I understand meshing functions already exist ...
1answer
168 views

### Normal Plot (visual test for normality)

I wish to construct a Normal Plot to visually test for normality of data. My data is: {188,199,171,200,219,172,235,194,234,206} And needs to be plotted to look something like this: Whereby ...
1answer
294 views

### Finding numerical/analytic solution to a derivative

Consider the following system of equations, with 11 dependent variables: ...
2answers
212 views

### Problem with PlayerPro recognizing a proprietary package

This question follows on from my earlier question Can Wolfram's Player Pro Use Proprietary Packages. That question appeared to have established that, yes, PlayerPro can use proprietary packages. ...
1answer
168 views

### Wolfram Workbench problem with JLink

I'm working on Wolfram Workbench 2.0 and I'm creating a JLink Application project. Below there is the code: ...
1answer
99 views

### Combining two notebooks

I have a notebook which contain all the variables and defined functions. I want to do two tasks. As an example, I want to find the density and energy which have equations in terms of above mentioned ...
1answer
106 views

### Why are some option values symbols, other strings?

Is there a rationale, beyond historical accident, why some Mathematica option values are strings, while others are symbols? It seems natural that some value spaces, e.g. named color schemes, are so ...
1answer
236 views

### Is it possible to modify the tick marks in BarChart plot?

I need to specify the length of the tick marks on the x axis in a BarChart plot: ...
0answers
62 views

### How to programmatically comment out multiple source files?

How to programmatically comment out the entire content of multiple .m source files assuming they start with correct Mathematica syntax? I need it to be robust so ...
1answer
63 views

2answers
164 views

### Click on a curve to start Manipulating another function

I'm able to plot two lists with a tooltip on the curves to display the name of the curve: ...
1answer
107 views

### Can anyone identify these plots? [duplicate]

I need to produce some plots that look like these but I'm not sure what they are called in mathematica, can anyone identify them ? Update: I want to plot triples of the form (xvalue, yvalue, ...
2answers
241 views

### Why are these flow lines cut short?

I want to plot some flow lines for a certain vector field, but Mathematica doesn't seem to plot the entire flow line, only a small piece of it. How can I fix this? ...
1answer
436 views

### NDSolve two PDE plus one ODE, together

I have a couple of PDE (time and space/length) that are correctly managed by NDSolve, but to which I’m adding an ODE on which the acc “accumulates”, through time, a ...
3answers
272 views

### Impose the color for one discrete value above a color predefined gradient

If I plot an array with option ColorFunction -> "Rainbow" : ...
3answers
338 views

### How to remove unwanted regions in a three-dimensional surface

As the title indicates, I want to delete some unwanted regions in a three-dimensional surface created using ContourPlot3D. Here is the corresponding code ...
1answer
189 views

### Running postgresql query with backslash

I've been able to connect to a Vertica database, and also been able to run a SELECT query. But I'm not being able to run a query with a backslash in it. (Vertica has commands like postgresql.) The ...
2answers
227 views

### Combining two plots which are in two regions

I want to combine two plots which are in two regions. For an example, I want to plot following two figures in the same plot. ...
2answers
96 views

### Puzzling behavior produced by Exists

I need to simplify a set of solutions of a system, say for example: ...
3answers
174 views

### How can I name “a[[i]]” the parts of Table “a”? Or how to make Table “a” grow inside FindMinimum?

Let's say I want to minimize a function that uses a Table named a with the Conjugate Gradient Method of ...
1answer
865 views

### Solving a system of differential equations [closed]

I have tried the input: ...

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