# All Questions

50 views

### ListPlot and ListLinePlot, show nothing, how can I plot correctly? [closed]

I'm trying to plot a graphic using a list of pairs, i.e., {{x1,y1},...,{xn,yn}} but nothing appears in mathematica notebook. I used the following commands and list: Does anyone can help me please, ...
166 views

### Output is Input for a Differential with Sign?

Here's the problem: For one of my classes, we're supposed to use Mathematica to solve the equation y''=y-b*y' for a variety of b values and specified boundary conditions and plot the outputs. There I ...
143 views

### Remove Successive Duplicate From A Large List (200k by 4 matrix)

I am interested in removing successive duplicate rows from a very large list (~200k rows by 4 columns) using Mathematica.The built-in 'DeleteDuplicates' seems to remove all duplicates, I am interested ...
35 views

### Series expanding an expression to an arbitrary power

How can I get Mathematica to directly produce the series expansion of an expression such as $(1+1/x)^n$, where $n$ is an arbitrary positive integer? Note that it's important in my expression to keep ...
54 views

### graphics grid legend

I'm working with mathematica 9.0 and I want to make a graphic grid containing 3 different plots. My problem is that when I use plotlegend to label the plots the legend does not show up or the left ...
51 views

### Tube and CapForm

I am using version 10 to draw tubes. With the CapForm set as Butt the first pipe is as expected but the bent pipe has one rounded end. Is this a bug? How can I fix this? Thanks ...
42 views

Looks to me that the FITS Export is borged. Here is the problem: When I export out images with accustom metadata into a FITS file, Mathematica truncates and overwrites it. Here is the metadata I ...
67 views

### Why it is not filling to axis? [closed]

Here is the code, ...
106 views

### Help in Bifurcation Diagram

My dears, I need to plot a bifurcation diagram for the following non-linear systems represented by the next Mathematica code ...
55 views

### Evaluating arguments of module (inside compile)

Note: this is a clarification of 2 earlier unanswered questions, Compile issues, scoping and order of evaluation and Optimising a simple computation with vectors . The problem I have a list of ...
91 views

### Help optimizing some code [closed]

I have a code that numerically solves a series of equations, but the code is painfully slow. I was hoping someone could help me improve/optimize the code. When I run the code: ...
70 views

### Real time visualization of parametric plots

I wish to see the following curve develop in real time. f = {Cos[s/Sqrt[2]], -Sin[s/Sqrt[2]], s/Sqrt[2]} ParametricPlot3D[f,{s,-2Pi,2Pi}] I tried to get ...
33 views

### Finding related roots to a polynomial

I posted this in math.stackexchange, but this might be a better place. Assume that $f(X,Y,Z,V,W)\in \mathbb{Z}[X,Y,Z,V,W]$ is some polynomial and assume that $f(x,y,z,v,w)=0$. I would like to know if ...
85 views

### Weird glitch again!

I have been struggling with these glitches for two days... A related question I asked is here How to eliminate the white gaps in the graph Here is the code, ...
304 views

### Joining ordered set of points with splines in spiral

I have a collection of points ...
79 views

### Using Manipulate[ ] with physical units

I'm a new user, and am trying to build a simple Boyle's law system in Mathematica. I want to include the units of the values, as I may need to perform some conversions later. If my quantities are a ...
288 views

### How to add a vertical line to a matrix?

Today, I want to write a program to show the solving process of a the inverse of a matrix, and I use the Elementary transformation, so I need to add a vertical ...
102 views

### MapAt a function at specific positions

I'm trying to solve for $p3$ in 3p3-5 = p1 + p2 at positions where p1*p2 == 0: ...
92 views

### Modifying parameters: Set::setps in the part assignment is not a symbol [duplicate]

Ok, this will probably be a silly question, but I can't get my head around it. I'm making a simple module that, given a list and two integers, will swap the position of the elements in the ...
129 views

### Weird output of DistributionChart

I have a larger data set and want to display it using DistributionChart. ...
54 views

### How to find equations of motion and plots? [closed]

I'm doing a project where I need to map the motion of pendulum attached to a spring. I have successfully got the Euler-Lagrangian and both motion but I am having trouble solving the differential ...
88 views

### NDSolve and Piecewise functions

I want to clarify upfront, This is not a please help me get the answer to my homework question. I know what I need to do I just do not know how to get mathematica to do it. I am working on an ...
97 views

### Visualization/colorization of many outliers in a BoxWhiskerChart

Imagine a larger data set which I want to display using BoxWhiskerChart. ...
47 views

### How to find intersections of intervals? [duplicate]

Let a finite set of closed intervals in the plane be given. How to find all the intersections of these, outputing the intersection points together with the intersecting intervals? This is a problem of ...
83 views

### How can I load << MathWorldCurves?

I'd like to recreate in Wolfram Programming Cloud the plot in http://mathworld.wolfram.com/notebooks/SpaceCurves/Slinky.nb How can I load ...
65 views

### Mathematically Eliminated in Baseball

Earlier today the Yankees were mathematically eliminated from the playoffs. Determining when this condition is satisfied for any given team is complicated but can be solved as a maximum flow problem, ...
41 views

### Indeterminate result from function, but not from equivalent expression [closed]

Can anyone explain this result? Why is one result Indeterminate and the other not? ...
70 views

### Plotting (Graphing) a Quadratic Function with Vertex and Roots

I'm new to Mathematica and I'm not really familiar to the Mathematica functions and the language. Could any of you help me plot a quadratic with the following characteristics: vertex at (1.5, 1.75) ...
78 views

### Derivatives of Convolutions with Integration by Parts and Delta Functions

I am not even certain how to approach this problem. f[x] is a pdf: positive definite, normalized, and approaching 0 at +/- Infinity p[x] is f[x] convolved to a normal dist of mean = 0, variance = v. ...
24 views

### Non-aggregated solution for NonlinearModelFit

I try to fit a rather simple functional form to data, lm = NonlinearModelFit[estdata, a + b*x^2, {a, b}, x] obtaining ...
74 views

### How to plot multiple orbits with more than two functions

Using a program given to me (which was designed to have a particle orbiting another of infinite mass), I tried to extend it to the motion of two particles orbiting a common centre of mass. I have a ...
76 views

### Formatting ticks of axes to scientific format and modifying the labels [duplicate]

I was trying to plot a function, but had a problem with the tick labels staying close to each other (top plot). DiscretePlot[RmvsB[b], {b, bmin, bmax, bstep}] ...
44 views

### How to open *.sif files with Mathematica

While I am processing my data collect from an Andor EM-CCD, I find it diffcult to import the file into mathematica. I think mathematica can open this kind of files since that Matlab can open it. So if ...
114 views

### Indeterminate expression 0^0 encountered

I'm new in Wolfram Mathematica so the the question may seem quite simple. I define the following function ...
65 views

### Why doesn't this invocation of Probability work? [closed]

I'm trying to invoke this Probability[x < 3, x ≈ DiscreteUniformDistribution[{1, 6}]] Why doesn't Mathematica execute this and give me an actual number?
120 views

### Given a system of inequalities, how to make Solve find out that two variables should be equal?

Given two boolean variables x1 and x2 (in the sense that they are in the range [0,1]), if I try to solve the following equation system with Solve: ...
182 views

### Improving selection of elements from large multidimensional array

Frequently in my profession I deal with large arrays of data. Typically these are mixed types including integers, strings, dates, and reals. To recreate a typical data array: ...
301 views

### How to eliminate the white gaps in the graph

Here is my code ...
144 views

### What's wrong in FunctionPeriod?

FunctionPeriod[Sin[16 Pi x/5 - Pi/8], x, Integers] 80 then I ListPlot the function: ...
129 views

### Plotting recursive from a for loop

our assignment is that we have make a plot for the possition of 1's From the recursive function if a[n-1] is even then ...
54 views

### Optimising a simple computation with vectors [closed]

I need to optimise the evaluation of expressions such as the following, ...
101 views

### Compile nested Sums

I want to compile an expressions that contains nested Sum-expressions. A simple example that gives me problems is: ...
54 views

### Show actual Interpolation function [duplicate]

Is there a command to show the actual function when using the Interpolation command? For example, f = Interpolation[{1, 2, 3, 5, 8, 5}] returns ...
97 views

### How to plot a 2-D function of points which is a function of points from the Unit Circle

Consider the set of points $(x,y)$ such that $x^2+y^2=1$. Consider the functions $f(x,y)$ and $g(x,y)$ and I want to plot the set of 2-D points whose co-ordinates are $\left(f(x,y),g(x,y)\right)$. An ...
100 views

### A documented syntax of FileNames doesn't work?

According to the documentation for FileNames: However when I attempt to use this syntax I get an error: ...
29 views

### Numerical Error with Matrix operations

A is a 3x3 matrix, b is a 3x1 vector. I try to convert [A|b], a 3x4 matrix, to [I|0]. So the formula is right multiple ...
44 views

### Stop watch coding for PCs [closed]

I am Kullan. I need a code for Stop-watch which will run in Mac or windows. The input Timing should be given by the user and Watch should be control by Manual interface. Thanking you..
33 views

### Multiple regions on same plot [closed]

Let $x$ and $y$ to be two real variables. Consider the regions $$xy\leq -\frac{1}{2}$$ and $$x^2+y^2 \leq 1$$. I want to see this regions on the same plot with different shadings. How do I achieve ...