# All Questions

250 views

### On making a graphical real-time memory usage monitor

I'd like to make a graphical version of Dynamic[Refresh[MemoryInUse[], UpdateInterval -> 1]] A naive implementation would be something like: ...
89 views

### network visualization with different colors for different edge labeled

I have a network with 3 different edge types, edgelist file is a three column file with id1, id2 and edge label. I uploaded the file here What I need know is to find a way to plot this network, as ...
227 views

### Removing background from peak function

Let's say I have a a very large list of data in the format {{n,f[n]}} so something like {{1,600},{2,700},{3,1100}...} and if this data is plotted, then it will look like a sum of Gaussian functions+a ...
201 views

### Timing problem with ReplaceRepeated

I have the following data: ...
88 views

### Hatching pattern in ColorRules for MatrixPlot

Using ColorRules with MatrixPlot, how does one get a hatching pattern in one of the cells? For example, consider the ...
100 views

### How to plot a graph with some disconnected vertices?

I am trying to plot a graph with $6$ vertices but I do not want some of the vertices to be connected. I have drawn a picture to illustrate my problem. So far I know how to plot $6$ vertices without ...
370 views

### Exception with GatherBy: gathering complex conjugates

I want to gather the complex-conjugates that are in a list, but with an exception: only if the imaginary part isn't zero. For example: ...
260 views

### Struggling to understand Query

The documentation for Query starts with: ...
92 views

### Extracting factors from an expression

I want to transform expressions into lists of elements. For example, b*c + a*b*c /. Plus -> List /. Times -> List ...
89 views

### Plotting cones from data read from a file

I would like to plot cones centered at specific points in a lattice and with different orientations and colors that depend on them. For this, I have the data in an external file with 11 columns: 1) ...
197 views

### Constant Heat Flux Boundary Condition for the Differential Heat Equation

I am attempting to solve the transient heat equation for a very simple geometry and I am getting a junk solution. I have identified two distinct regions (wall and super-heated fluid layer) with their ...
81 views

### On an existing notebook, how to transform all “double brackets” into “DoubleBracket”

Sometimes, having all double brackets [[...]] transformed into \\[LeftDoubleBracket] ... \\[RightDoubleBracket] can really ...
359 views

### get position index for all element in a list

For example mat={{a,b},{c,a,a}} How to write a function posindex that posindex[mat] will ...
77 views

### Finite Difference equations - slow computations

The following code I have written runs very slow, in fact, so slow that it does not finish computation. ...
381 views

### Numerical solution of Schrödinger equation

I want to solve the following differential equation numerically. The geometry of the problem is as shown below. Electron 1 is located on the inner ring of radius $R_1$ and electron 2 is located on the ...
100 views

### Parallel function evaluation for minimal value

I am asking myself, if the evaluation of a function f looking for a minimal value over a discrete set of values can be parallelize (brute scan for a potential ...