# All Questions

568 views

### Stacked Line Graph with fragmented data

Let's start with what I already found on the internet: ...
146 views

### Adjust the opacity of the lines in a ListPlot

Here is what I am trying to plot: ...
194 views

### Simplifying fractions

What ComplexityFunction (or other technique) can I use to have Mathematica pull things out of fractions? I have a rational function of several variables and I'd ...
66 views

### Show List of HighlightGraph Objects in Matrix

I'm new to Mathematica and can't get my problem solved. I want to display a list of HighlightGraph objects in MatrixForm like ...
244 views

### How to simplify power series in terms of functions

For example, after some computations mathematica outputs $$\sum_{k=0}^{\infty} \frac{k g_k z^{k+4}}{(1-z)^3}$$ and we assume that $$G(z)= \sum_{k=0}^{\infty} g_k z^k$$ so the question is: how ...
270 views

### Do any mainstream text editors support Wolfram Language syntax for highlighting?

Syntax Highlighting for Mathematica on a Blog There is the above, but I'm not terribly excited to install rogue packages. For example on github, I share lots of Mathematica code. I see no way to ...
95 views

### How to save the results in an identical Excel file (.xls) in each iteration of a Do loop

Assume the following code (Below code is just an example to clearly illustrate my problem): ...
144 views

### Is it possible to model the piano key attack?

My purpose is to model the attack of a piano key. As the key is pressed a sound must be emitted. When the key is released the sound must stop with decreasing volume. I have a partial success when ...
73 views

### What's going wrong with this button! [duplicate]

I'm implementing an Adaline algorithm where all inputs are 1x5526 and the output is a number from 1 to 10. I have this two functions defined and worked outside the ...
197 views

### Plotting plain data (single value lists) in 3D

Some Chemistry data sets I am trying to plot some titration data with Mathematica. I have done 4 experiments and gathered around 70 pH points (one for each milliliter) during each session, and ...
157 views

### How to make list plot when all information is in a single list

I want to make a plot , where the data is structured like so { {"l1", "l2"}, n1, n2, n3} } The values in the inner sub list are labels which are associated with ...
100 views

### Alternative for citation management in Mathematica 9 for Mac

I have just read that Mathematica 9 for Mac does not support Citation Management. Any ideas of a poor's man replacement so I can still use Mathematica on Mac for editing? I mean, have someone written ...
320 views

### Multiple plots on same graph for different parameter?

I would like to be able to Plot a function (with an implicit Integrate command) with various values for a certain parameter ...
189 views

### Import CSV with “Numeric”->True and “DateStringFormat” problem

The CSV file linked below has 3 columns: "PT_ID" (char 4), "PHYS_ID" (char 2) and "VISIT_START_TIME" (varchar eg "0:00:15" hours minutes seconds) ...
39 views

### Filter sublists that contain a certain value [duplicate]

This question is a followup from appending elements to sublist mergedList = { { {"a","b"}, -1.5, -5, "no" }, { {"c","d"}, -2,-10, 7 } } I ...
75 views

### If statements with a Boolean [duplicate]

If I have a vector {1,2,3}, I want to write an If statement, where if one of the positions is "1", it will perform a certain command. ...
250 views

### Mesh at Ticks positions

In a ListPlot3D[ ] I want to have the Mesh at the same positions as the ticks. For some reason this isn't default if both are ...
183 views

### Display truncation of numerical values when writing to a file

I am trying to copy some numerical values of parameters from a plain text file into Mathematica, then arranging them in a list and exporting them to another text file, with .ini extension. My problem ...
267 views

### appending element to sub list [duplicate]

I have a list of the form: lstA = { { {"a","b"}, -1.5}, { {"c","d"}, -2 } } I wanto to add another value to each sublist that ...
158 views

### Multiple swapping of rows and columns

m={{a, b, c, p}, {d, e, f, x}, {g, h, k, z}, {u, v, w, y}}; I want to swap 1st and 2nd rows by 4th and 3rd rows respectively. And then, swap 1st and 2nd columns ...
146 views

### A question about definite integrals and timing

I need to integrate the expression G given below: ...
83 views

### FlipView Alignment problem

Here's the problem with MWE: Framed[ FlipView[Framed /@ {100, 1}, Alignment -> Center] , ImageSize -> {100, 150}, Alignment -> Center] I ...
303 views

### Parallel computation of a system of differential equation

I need to solve a system of differential equations which contains, at minimum, ten thousands of differential equations. Actually, I am trying to solve density matrix equation. It's like something ...
59 views

### how implement OOP [duplicate]

I have a task implement OOP in wolfram mathematica. I think write class Point and inherit from it class Rectangle. In C# or C++ it's very easy, but I don't know how do it in wolfram mathematica. All ...
310 views

### Performance tuning - Explicitly set Mathematica use Nvidia GPU for rendering

I feel hesitated to ask this question, but I cannot figure out a way to increase the performance. The problem is about running this featured example on a computer with both Intel HD GPU and Nvidia ...
183 views

### Comparing Positions of Elements in a List

How can I check if Position[i] > Position[j] for two arbitrary elements in a given list? The problem is that Position[i] ...
85 views

### Improving a function that filters each table from a list of tables

I have written the following function which can take in a list of tables as an arguement, and then filters each one. The function I wrote is below, and the commands I combined are listed below the ...
122 views

### MarginalDistribution with Symbolic range in ProbabilityDistribution

Given the following joint density: for 10 < x < 20, x/2 < y < x. To find the marginal density for X we do: ...
31 views

### How to change $n$ variables with $n$ Buttons automatically [duplicate]

I was trying to make a little game, and I came accross this problem. The goal is simple. There are going to be $n$ number of buttons, and each one will change a value of one variable. For example, ...
169 views

### Manipulate for variable number of sliders

I'm trying to use Manipulate for plotting multidimensional data, where higher dimensions are defined as sliders. First, this simple example works: ...
247 views

### Conditional search along the columns of a matrix

I want to implement the following algorithm in Mathematica. Get element along main diagonal of a matrix. If the element along the main diagonal is positive, then return the positions of the elements ...
390 views

### Breaking a sorted list into bins of a specified size

Can somebody please explain me the following: If I try to split data every increase in 0.5: ...
445 views

### make mathematica recognize CCompiler and compile CUDA code on remote Windows machine

I have set up a Mathematica remote kernel on a Windows 7 64 bit machine, which has Microsoft Visual Studio 2010 installed. When I start Mathematica on the windows machine Mathematica recognizes the ...
117 views

### Mean Squared Deviation for Population Data

I've been using the Lotka-Volterra equation to estimate population sizes and need to find the MAD (mean absolute deviation), MSD (mean squared deviation) and mape (mean absolute percentage error) for ...
171 views

### Change input variable in a function [duplicate]

I'd like to write a function, that would take a matrix as an input parameter and would change it by multiplying one of its rows by a factor. I try to do it in the following way: ...
187 views

### Sampling a musical instrument (or re-tuning MIDI)

I'd like to try to convert a piece of MIDI music made with SoundNote to another tuning (not microtonal or even split-black-keys, just a slightly different tuning for each note). I searched for pitch ...
199 views

### Center Diverging color map on a matrix plot

I want to use the color function "RedBlueTones" and I want to center the map at a number. Then I want to blend in the red direction of I am greater than that number and blend in the blue direction if ...
139 views

### Time delayed evaluation of a function

I'd like to write a function that delays the evaluation of a function (say) $5$ seconds after I hit Shift+Return. Is this possible?
312 views

### Why is evaluation Enter for Mac and shift+Enter for Windows? [closed]

Per the title, why is evaluation done using just the Enter key for Macintosh and shift+Enter for Windows? UPDATE Okay, I see the Mac keyboard's "Enter" key is actually labeled "Return", so by Enter ...
100 views

### Meaning of backtick in conjunction with units [duplicate]

In this fragment from an equation solution the backtick is used twice: ...
430 views

### Is there a built-in procedure for simultaneous diagonalization of a set of commuting matrices?

Given a set $\{A_1,...,A_m\}$ of $m$ commuting $N\times N$ diagonalizable matrices, it is known that there exists a basis of eigenvectors $\Lambda$ that simultaneously diagonalizes all the $A_i$. Is ...
66 views

### add a legend show the expression for each contour?

I am trying to visualizing the unit circle under different norm functions, here is the code: ...
149 views

### A timed switch with Dynamic

I'm trying to make a binary switch that switches after a fixed given interval. Why doesn't the following work: ...
265 views

### Plotting with ColorFunction -> GrayLevel - no black

This is probably a fairly trivial question, yet I have been unable to find an answer - help would be much appreciated! :) I am trying to plot a 28 x 28 matrix (tabulated data given here), containing ...
58 views

### Simplifying expression on power [closed]

I want to understand the behavior of Mathematica for the following code. ...
101 views

### SetterBar divider style in Manipulate on a Mac

MMA 9.0.1 MacOSX "Mavericks". This issue is apparently mac specific. The issue of this post is illustrated here, for example. In a SetterBar control straight out ...
83 views

### Trouble fitting an explicitly complex model with the TransformedFit package

This is follow up from a previous question in which @Oleksandr R. suggested the use of a package he developed for splitting a model and data into real and imaginary parts to avoid a problem with ...
356 views

### How to use the same colors in Epilog and Plot

How can you use the same colour to the data in Epilog as the data in the ListLinePlot? I am plotting 25 lists (4 in this ...