# All Questions

148 views

### Keyboard shortcut for moving to last edit location/cell

When you have long notebook with hundreds of cells, you sometimes need to scroll/jump manually to your last edited cell. I dind't find any shortcut for doing that. Any ideas?
1k views

### How to Make a change of variables

I have the following expresion ...
167 views

### Solving for any one variable in a formula given values for all the others

Suppose I have an equation relating a number of variables and I know the values of all but one of them. Using the equation and known values as input, is there a simple command (built-in or otherwise) ...
366 views

### Understanding execution time in nested loops

I have the following simple code ...
116 views

### SparseArray internal structure [duplicate]

According to the documentation: SparseArray is treated as a raw object by functions like AtomQ and for purposes of pattern ...
209 views

### Importation multiple dcm images [duplicate]

I'm extremely new to Mathematica. I want to import 201 .dcm (DICOM) files into Mathematica 9. Is there a way to do this which doesn't require my doing it an image at a time? My ultimate need to is to ...
159 views

### Matrix substitution

I'm newbie in Mathematica and would like to ask one simple question. Let's say I have matrix with some elements == -1 ...
51 views

### How to find the x-axis intersections/zeroes of a parametrized integral? [duplicate]

Consider the situation with this functions, ...
408 views

### 3D plots with a continuous and discrete input [duplicate]

How can I plot a function with one discrete and one continuous input? Plot3D wants everything continuous while ListPlot3D and ListPointPlot3D want everything discrete. I would like be able to say ...
201 views

### displaying Laurent polynomials nicely

I have some 2-variable Laurent polynomials in $q$ and $t$, and I'd like to collect powers of $q$ and display them without using fractions, and to sort the terms by the power of $q$. For example, I'd ...
239 views

### Bug with SparseArray selector in Pick

Bug introduced in version 8 or earlier and fixed in 10.0 I have created a notebook with two cells. This is the content of the first: ...
620 views

### Applying non-Affine transforms to 2D polygons with textures

I am trying to create a vanishing point perspective transformation of 2D polygons, for example transforming the red polygon into the blue polygon: ...
440 views

### Is there the full Wolfram Language in Mathematica?

Today I read the new entry on WolframBlog with all it's nice little demos. I was realy interested in those with astronomic informations, but trying these with my own Mathematica I was irritated: ...
840 views

### Creating sculptural forms using graphics primitives

This is a question based on this answer by halirutan. Some amazing images can be created with this code, and I was wondering whether it was possible to extend the principle to different shapes. I ...
588 views

### Heat Transfer equation by numerical methods

I want to solve the following heat conduction equation using numerical methods: D[u[x, t], t] -alpha*D[u[x, t], {x, 2}] == 0 u[x, 0] == 1/(1 + x^2)^0.25, u[-10, t] == u[10, t] == 0, ...
130 views

### Creating hyperlinks from a list of file names

Suppose I use FileNames to get a list of file names. I know that it's possible to make a hyperlink using this kind of pattern.... ...
110 views

### Extracting a single weakly connected component from a network of many weakly connected components?

Hello Mathematica friends! I've got a network with thousands of edges and vertices, but not all in one connected component. I'm trying to extract specific connected components from the network, and ...
164 views

### How one can make the boundary of the regionplot smaller or bigger?

Suppose we have a regionplot as follows: ...
178 views

### Clean-up Code / Reduce variables

I'm writing a playing card simulator of sorts, and everything works fine, but some Modules use a disgusting amount of variables. For Example: ...
101 views

### Auto-complete for user defined functions [duplicate]

If I define a symbol in Mathematica, it doesn't show up in the autocomplete list that works for symbols in System. Test code: ...
193 views

### How to put a dodecahedron inside another dodecahedron?

I know how to put a sphere inside a dodecahedron but instead of a sphere I would like it to be another dodecahedron. How can I do it? ...
68 views

### Creating a function that can be called like the definite integral template (dintt)

The definite integral template takes 4 arguments as can be seen here: Is it possible to make a function that can be called in the same kind of way? For example is it possible to make this call a ...
94 views

### Matching variables with Subscripts yielding True and False

I am trying match variables with subscripts just returning true or false depending if pattern is matched. My try is to use Cases. However the following does not ...
206 views

### Modular surface of tri-focal Cassini curve ContourPlot3D missing feet

I am wondering why the following fails to cover the surface at points near $k = 0$. ...
147 views

### How to write my own interpolation method [duplicate]

I was comparing results of spline interpolation in Mathematica and C++/gsl-library Results of interpolation are different if I use ...
72 views

### Mouse motion makes frame disappear in Overlay of long ListPlots

Using M9, OSX 10.8.4, most parts of the Frame in the following overlay disappear (also partially occluding some FrameTicks) ...
335 views

### How to manipulate lists of parameters?

Suppose I have a function of a variable f, depending on some other parameters a and b, for ...
306 views

### Convert epoch seconds to date [duplicate]

I have got the following datetime from an API: 1395401384298 I am guessing it is in epoch miliseconds time (it should be one day in 2014) How can i convert it into a more readable String? I have been ...
90 views

### Multiplying a list and randomly re-assigning that list to a series of numbers

I'm trying to write a script that matches a particular element to a coordinate. Let's say there are 24 coordinates; and that fractionally a:b:c:d:e is 18%:18%:18%:18%:27%. Instead of matching 4 of a, ...
253 views

### Minimize: How to work with specific numeric types

This is a question about the use of symbols in Minimize and how to persuade Mathematica to treat them in a specific way (as integers or rationals) that I have not ...
791 views

### Image Processing: Edge detection of the tumor on tomogram. Сalculation area of the tumor

The task is to identify the image region of the tumor. I try to use example from documentation centre: ...