# All Questions

52 views

### How can use Table for two functions obtained from NDSolve? [on hold]

I have obtained a numerical solution using NDSolve for two functions a(x) and b(x). how do I use Table to make a list of a(x) vs b(x) values. is it simply Table[{a(x),b(x)},{x,0,100}] or should I use ...
29 views

### How to use ListLinePlot to draw graph of a function vs another function obtained from NDSolve? [on hold]

Using NDSolve I have found solution of two function $\phi(z)$ and $f(z)$. then I use ListLinePlot to find a plot of ...
65 views

### How do I label points when using Graphics? [on hold]

Let say I want to draw a point and label it. The command I use to draw points is Graphics[{Point[{0,0}], Point[{1,1}]}] This draws the points $(0,0)$ and ...
74 views

### Visualize Pascal's triangle with the product of the terms in the $n$th row

How to make the following graphics by using Mathematica? What I tried: I used J.M's answer for the Pascal triangle ...
166 views

### Looking for a better way to delete an arbitrary list of rows from a matrix

Delete is not suitable to delete the rows of a matrix, as illustrated below: ...
45 views

### Difficulty finding roots of an interpolation function from NDSolve

I have been trying to find the point at which one of the solutions of a system of two ODEs crosses zero. I used the method suggested in this answer to a previous question, which seemed to be the most ...
15 views

### Is it possible to highlight nonconsecutive words in any given text cell?

This is a bit of a miscellaneous question, so I'm not entirely sure how to tag it properly. Windows users can use the CTRL button (and Mac users, Command if I'm not mistaken) as a sort of hotkey to ...
121 views

### Basic Programming in Mathematica - How to build a loop [on hold]

I want to build a loop with the following rules: I have a list a={5,7,8,9,5,6,8,6,7,8}. I want to print the mean of the first two ...
28 views

### Set more constrains on a function in Do loop with If condition [on hold]

This post is an extension of the post: Do loop with If condition The answer of @JasonB worked fine with me. that to use Reap ...
31 views

### Collapse cell groups when you close parent group?

I have a particularly long notebook. Here's what I'd like to do: to say in my stylesheet that upon closing certain types of cell-groups that all the cell-groups inside should close as well. That way ...
48 views

### Image background for cell?

I'd like to make code Cells have a specific background image. I know you can do this for Notebooks, but what about Cells? This simple test fails: ...
28 views

### Conditioned Minimum [on hold]

How do I say to NMinimize that I want to know the point $(x_{0},y_{0},z_{0})$ where the minimum of a function f[x,y,x] is ...
62 views

### How to solve different PDE defined in different regions coupled through boundary condition

I would like to solve two different partial differential equations each one defined in a different region and in different coordinates. However the equations are coupled through a boundary condition ...
35 views

### Series expansion in Infinity issue with Zeta(s) function

With this code: Series[Zeta[s], {s, Infinity, #}] & /@ Range[10] // MatrixForm Series expansion for the Zeta(s) ...
40 views

### help with basic matrix multiplication! [closed]

This is my code. It is simple enough. ...
64 views

### Will the solution NDSolveValue finds outside of the region I give it give me bogus results?

I'm using NDSolveValue to solve Laplace's equation for a relatively simple system. I have two rectangles, separated by a small gap, which I define using RegionDifference: ...
95 views

### Replace non-zero elements with symbol

I have a very large matrix (tensor) in Mathematica with some zero and non-zero elements. I am interested in replacing the non-zero elements with some symbol or a 1 so that it is easier to view the ...
86 views

### Manipulate a Show [duplicate]

It takes me a long time to construct the following picture: ...
23 views

### Compiled function giving error CompiledFunction::cfct [closed]

I'm trying to compile this function LocalPotential below: ...
46 views

### Different options for ResamplingMethod specification

Is there an option for ResamplingMethod (or any other practical way) for specifying different behaviours of the interpolation, depending on, for instance, closest dates (on the ...
43 views

### Getting error message from Minimize [on hold]

I have acountered a problem I can't fix on my own, even though the problem seems quite simple. Problem The objective function (<<1>>) should be scalar-valued >> It occurs in the very end ...
66 views

### Solving a matrix differential equation using RBFs

Michael Kelly in the paper http://www.mathematica-journal.com/2010/02/evaluation-of-financial-options-using-radial-basis-functions-in-mathematica/, discussed how to apply Mathematica for solving the ...
30 views

### Single rows of arrows in VectorPlot [duplicate]

I have two vector fields which have only one component, e.g. the y-component of the graph below. How do I obtain a plot similar to the one uploaded here, by using ...
18 views

### The command SocialMediaData still returns a blank plot [duplicate]

I have Mathematica 10.3.1 in Mac OS, and the command SocialMetaData is not working, returning a blank plot. I have seen a similar question from Nov 28 '15, but it is still not solved. ...
41 views

### Out[ ] cells suddenly begin with newline

This is a "feature" of Mathematica that persists through several versions. What happens: Mathematica experiences some internal hiccup and from then on starts every Out[ ] cell with a newline, which is ...
89 views

### Do loop with If condition

I have the following formulas: 1- A cross section: sigma[beta_,alpha_,Y4_] := c^2/(256*Pi) * (1/2) ( Ytt[beta,alpha,Y4]/ m ) * Abs [A] )^2 Where c is a strong ...
87 views

### How can the same Mathematica version give different symbolic results on different machines?

I'm testing the following code: ...
118 views

### Fractal plotting for the Collatz fractal

I have the following equation: f[z_] := 1/4 (2 + 7 z - (2 + 5 z) Cos[Pi*z]) I want to map this on the imaginary plane such that if it converges under iterations ...
94 views

### Tweet high quality images

I'm trying to export images to a twitter account with mathematica and the quality of the images is rather disappointing. Here are the others in case you want to see it in the wild: here This is ...
15 views

### Finding Y for a Data Set with Std Deviation and Z Score [migrated]

While only 15% of babies have learned to walk by the age of 8 months, 90% are walking by 13 months of age. If the age at which babies develop the ability to walk can be described by a normal model, ...
26 views

### Compute score for a set of data [closed]

So let's explain my problem. I have a set of items which have a score from 0 to 100. This set is dynamic which means that several values are expected to be added from moment to moment. In each item is ...
42 views

### NIntegrate::inumri error with continuous function

I'm trying to calculate the finite part of a divergent integral numerically, but as I bring the regulator down to $0$, Mathematica starts throwing an error. ...
22 views

### Factorising polynomials in Z[i] over Z[i] [closed]

I know that you can use the 'factor' command to factorise polynomials with real coefficients over the Gaussian Integers doing something like this: ...
30 views

### Find the variables in a set of linear equations [closed]

Suppose I have a set of linear polynomials with integer coefficients, how could I extract the list of variables? Say given the following ...
86 views

### CoefficientList for exponentials terms

I have a long expression with exponentials of variable t1. I need to create a list of the coefficients for each exponential. The problem seems to be that several ...
210 views

### Exclude overlapping lists while keeping disjoint- and sub-lists?

Consider a function f[l1_List,l2_List] which is given lists of integers. Whenever two of the lists contain completely disjoint sets of integers OR one of the lists ...
48 views

### Intercept in the ARProcess

In the ARProcess help file I don't understand whether an intercept is included or not. How would I add one? I am using version 9 of Mathematica.
34 views

### Frame plot axis labels: superscripts and subscripts in italic and non-italic

I want to make nice plot labels with framed plot. I need to have labels with both subscripts and superscripts, both of which need to contain italic and non-italic characters. For example \$a_{b, ...
54 views

### Looking for a convenient way to replace a large data sample with an analytic approximation

Suppose that data is a large data sample, and that Histogram[data] produces a very smooth-looking distribution. Since ...
37 views

### NMinimize to Optimize Parameters for Quarter Car Model

I am very new to Mathematica and am trying to simulate a mountain bike suspension by using a quarter-car model and I have input a displacement vs time road profile for two bumps for the excitation. ...
25 views

### How to express the power series in term of function? [closed]

If S^n is differential operator defined as follows S^0 f(z) =f(z) S^1 f(z) =z f'(z) S^2 f(z) =z (S^1 f(z))' . . . S^n f(z)= z (s^{n-1}) Consider the function ...
115 views

### What kind of pattern should I use with StringCases?

Consider the string str = "ABCaDEFbcABCdefDEF" I'd like to take out all substrings surrounded by the substrings "ABC" and ...
61 views

### What code can I use to calculate, integrate, and visualize the electric field for an arbitrary shape? [duplicate]

I'm looking for a Mathematica program/function with which I'd be able to specify two objects in 3D space, each at a different surface potential, and then the program would calculate (using Finite ...
61 views

### What's up with PauliMatrix with a string argument?

Looking at the definition of PauliMatrix (not the documentation), I realized that it is defined for arguments 0, ...
126 views

### Select non-zero elements [duplicate]

I have a function that generates a list of numbers and variables . e.g. F[w]= {wx, wy, 5, 0} I want to select all non-zero elements i.e. ...
54 views

### Add color bar in SphericalPlot3d in version 8

I want to add a color bar in my spherical plot. I have tried the BarLegend command in version 8 but it seems not working. Could anyone help me out a bit? I wrote ...
73 views

### Table with programmatically specified number of iterators in Compile

Compare two ways of computing a table of values of a multivariable Gaussian: ...
28 views

### *Form is not working in script

I want to generate code with a script. But functions as CForm, FortranForm and TeXForm does ...