# All Questions

32 views

### Sorting matrices by their norms

I have a matrices A and their Norms(Matrices B). I want to rank Matrices A based on their Norms. From smallest to highest Norm
33 views

### Comparison Graph

I want to draw the combine comparison graph of the following four sequences (note that two are approximatly equal), each one have different colors and lables etc AK ...
72 views
+50

### Why isn't LowPassFilter working for these parameters?

First I define a function, just a sum of a few sin waves at different angular frequencies: ...
33 views

### Visualization problems

I am visualizing 1-dimensional curves that are periodic. Due to periodicity, extending the domain should result in the curve being retraced and therefore remaining unchanged. This doesn't seem to be ...
122 views

### Solving my graduation exam geometry problems with Mathematica [on hold]

How capable is Mathematica when it comes to typical school geometry problems? Is there a way to throw constraints at it and get it to spit out a solution? Here are two geometry problems from my ...
17 views

### Easier way to input Dynamic matrix?

I've only been using MMA for a month, and I'm working on making interactive Linear Algebra examples that will be used online for students. Right now, for inputting numbers into a matrix, I've been ...
80 views

### Finding zero of nonlinear simultaneous equations [closed]

I'm trying to find the zero of nonlinear simultaneous equations defined in myfun1 and myfun2: ...
41 views

### Transforming Determinant to Polynomial Expression

I have determinant which equals zero. In determinant, i have x expressions. i want to transform the determinant to polynomial expression so i can solve that with mathematica. Note : Apologize for ...
34 views

### Show multiple RegionPlot3D Plots and with certain points rendered

I have the following problem. I have defined several 3D regions through RegionPlot3D. Now I want to add points. But somehow the points are not displayed correctly, ...
29 views

### Henon Map Equation Trekker Error

I am trying to make an Equation Trekker for the Henon map in the following way: ...
71 views

### Problem with a chemical optimization problem [on hold]

First of all, I want to say that I'm quite new to Mathematica. I searched a lot on this site to learn how to solve my problem, which this is the problem of my life! I want to minimize a function. It ...
33 views

### How can I get the differences of all elements of list?

I want to get the difference of all elements of a list for example: $L=\{1,2,3,4,5,6\}$ for any $i$ and $j$ $\in L$ return the differences, for example for the first element $1$ we get the difference ...
25 views

### Elastic Distortions in Mathematica

I want to apply elastic distortions to characters as follows using Wolfram Language: ...
21 views

### Drawing Arrows to connect points from two separate data sets representing coordinates

I have 2 separate excel files that I'm importing into Mathematica. Each excel data file has numerous rows of data containing a coordinate of three columns (x,y,z). I have been able to plot these ...
63 views

### Weird SeriesData behavior?

I was trying to calculate the determinant of a matrix whose elements are truncated series. As a result I obtained an expression like this: ...
46 views

### Derivative of a 2D Interpolating function

I cannot find a way to obtain the partial derivatives of a 2D Interpolating Function obtained with ListInterpolation. I didn't find anything useful on the web. Any ...
23 views

### High CPU load for dynamic classification

I encountered some issues with extremely high CPU load when I tried to classify live images (using Dynamic and CurrentImage[]). ...
58 views

Observe: ...
135 views

### How to do a parametric histogram?

Is it possible to draw a spectral histogram from two random sets ? More specifically, I have these two random functions (fmin, ...
41 views

### Eigenenergies of a symmetric tridiagonal matrix

we consider the time independent Schrodinger equation (TISH) where we want to calculate the first few instantaneous eigenergies. Discretizing space we get : So we can rewrite the TISH as, (where ...
46 views

### How to Extract Continuous .png Graph by Constant Piecewise Velocity? [on hold]

Condition: inverse problem in the extraction of continuous graph in time-potential data where points are distributed with constant piecewise velocity (artifact) Support 1: the constant piecewise ...
264 views

### The unexpected behavior of FindMinimumCostFlow?

Bugs(the fourth and fifth behavior) is present in V10.4.1 I'm at a loss to understand the behavior of the FindMinimumCostFlow function. Here are a few cases I ...
34 views

### How to find vertice by two angles and side? [migrated]

I know 'alpha', 'betta', length 'c', vertices: 'A' and 'B' How can i find the 'C'?
25 views

### Simplify: Why does it miss this simple one?

I got a result with the expression ...
35 views

### 2d numerical integration

I'm trying to get a numerical solution for a double integral: ...
91 views

### Making a 3D plot of $x\,y$ that looks like the one I get from Maple

I made a 3D plot of $x\,y$ in Maple: plot3d(x*y, grid = [10, 10], color = "Red", style = pointline,axes = framed) How can I make the same graphic in ...
39 views

### RegionPlot with rank constraint

I am trying to plot the feasible region of a rank constrained semidefinite program shown below: The Mathematica code that I am using is the following: ...
20 views

### Pre-processing and deconvolution of CLSM images

I have some confocal laser scanning microscopy data sets that I want to binarize for further analyses. Due to the fast bleaching dyes and the general scanning duration we established a setup which ...
28 views

### How to get Quantity to collect like terms?

In Mathematica numerical terms collect when their variables are equal. .2 "SERC" + .7 "SERC" (* 0.9 "SERC" *) However, numerical ...
24 views

### Nested parameter selecting in Manipulate

I have the following code, stripped down from the original to the bare essentials: ...
47 views

### Mathematica Bug with version 10.4.10 with OSX [on hold]

I have upgraded mathematica to 10.4.10 and OSX El Capitan version 10.11.4. On my desktop I use linux and mathematica version 9. I have a notebook on the desktop that run just fine ( I am solving ...
269 views

### Extracting filter coefficients from a transfer function

What is the correct way to extract coefficients (in a form I could use in RecurrenceFilter) from a filter which I have represented as a Mathematica transfer ...
298 views

### Numerical comparisons of matrices

I have a matrix which should be equal to a null matrix. However due to the numerical precision, a brutal equality test with a matrix initialized with zeros does not work. How should I perform the ...
31 views

### Finding the magnitude a matrices [on hold]

I need some help. I have a list of 3 x 3 matrices of real numbers.I want to find how close each of these matrices are to a {{0,0,0},{0,0,0},{0,0,0}} matrix. Any suggestions to a method algorithm or ...
95 views

### Implementation of a Hanning filter

I'm implementing a package for in-house signal processing. I wrote here a quite trivial function implementing a Hanning windowing of the signal. ...
327 views

### How to remove a line of a matrix if not all elements are numeric?

I have a matrix a n columns and m lines. I'd like to efficiently remove the lines that are not entirely composed of numeric ...
45 views

### Detection of blurry object

I have a series of very similar images (8bit gray-scale, png) where I track an object. The problem is that it is blurry and its brightness is comparable to the background. Below is the code how I am ...
28 views

### Naive question on ODE numerical solving and periodic initial conditions

I have a second-order nonlinear ODE for which I would like to find a numerical solution, with periodic initial (boundary) conditions. Can this be done directly with ...
70 views

### Calculate area of apple from image

I want to find area of following apple I want to do something like this: define boundary region of apple apple=... then find area using only ...
20 views

### Expectation of Rician Distributed Data [on hold]

As you can see in the attached file, I'm trying to obtain the expectation of some Rician distributed symbolic data. However output and input are the same. I guess that happens because Mathematica is ...
237 views

### Strange behavior of StringReplace, same expression evaluated differently

I have two expressions which are exactly same: StringReplace["in the next few days", {"in" -> "ffdsf"}] and ...
26 views

### Amelioration of a GraphPlot [on hold]

In the following graph ...
15 views

52 views

### Using Associations and Pattern matching in numerical functions broken

It looks like the very young feature of pattern matching (/replacing) within Associations (http://mathematica.stackexchange.com/a/119542/6804), with or without ...
40 views

### Place Legend above Epilog

I am currently struggling with a problem which I haven't seen answered anywhere else. I want to make a ListDensityPlot graph in which I need to draw some ...
113 views

### Plotting an equation describing a Joukowski airfoil

I am trying to plot an equation that will give me a Joukowski airfoil and am having trouble getting any results. The equation that I am using is as follows: ...