# All Questions

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### Symbol definition in parallel kernels

Suppose I have a reasonably large number of floating point arrays, obtained from prior numerical simulations. These are stored as binary files named data_#####.dat ...
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### How to re-express solution to system of equations after truncating the solution at a given order to give an exact answer

I have a simple enough system of two equations that need to be inverted: ...
87 views

### Help Please : Error in plotting the solutions of FindRoot

I want to find the roots of an equation using FindRoot as a function of a real parameter K and then plot the real and imaginary solutions vs. the parameter K. The function I'm trying to find the ...
77 views

### Shells with Mathematica

I am a beginner, so please bear with me. I would like to get this plot with Mathematica: In fact, both mathematical background of such plot, and its implementation in Mathematica are here. This ...
30 views

### Resolve not accepting equations involving factorial

If I take , Resolve[ForAll[x,x!>=0],Integers] True But if I make slight modification, ...
35 views

### How to change the scale on the x axis using Plot? [closed]

I need to plot the function $f(x)$ on the $x/x_0$ scale, where $x_0$ is some constant. Is it possible to change the $x$ axis scale on the graph using the function Plot[f[x],{x, xmin, xmax}]? Thanks.
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### How to discern the different curves?

When we plot many curves, due to repeated colors it becomes difficult to discern that which curve belongs to which equation. For instance, ...
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### batch processing proof of the number of jobs' relationship with service time and waiting time [closed]

The classical batch processing system ignores the cost of increased waiting time for users. Consider a single batch characterized by the following parameters: M average mounting time T average ...
27 views

### definitions and usages of options such as “Count” ,”Area”, “ConvexCount”, and “ConvexArea”

I would like to use ComponentMeasurements to do image analysis on porus materials. However definitions andusages of options such as “Count” ,”Area”, “ConvexCount”, and “ConvexArea” are not well ...
351 views

### Finding minimal distance between two surfaces

This code will display two parametric surfaces: ...
67 views

### How to create an effective PlotLegend when plotting many ListPlots?

I'm creating a ListPlot where I plot many data sets simultaneously. Currently, my code that produces it is something like this: ...
35 views

### Coefficients of a DiffEq [closed]

I'm attempting a Do[] recursion on Coefficient[] with the end goal to use it to find the coefficients of an nth order diffeq. The following is a basic example of what I'm trying to do, subbing a ...
40 views

### I have the best fit, How can wiggle a plane between the max and min errors [closed]

I have a table representing 3 dimensional data, I have found the plane of best fit but I now want to move the plane of best fit through the maximum and minimum error and display the planes current RSS ...
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### Using a held option

Woud there be an elegant way to use a held option ? For example if I need to pass by reference several variables but I don't always need all of them, it can be useful. For example if I want to append ...
100 views

### For loops in Mathematica [duplicate]

I'm actually the first time using loops in Mathematica. For example, I have: For[i = 1, i <= n, i++, For[j = 1, j <= n, j++, ....] How it is possible now ...
82 views

### Troubles with FindFit for ODE

I need to use FindFit for ODE with arbitary number of parameters. This code (from documentation) works: ...
124 views

### Missing control for depth of Inner

Working on a mechanics problem, I stumbled on something peculiar: Since Inner is a generalisation of Dot, it changes its ...
29 views

### Capturing error message information

Error messages returned from SendMessage occasionally have useful information in them. For example: ...
70 views

### Recursive functions taking list arguments

I wish to create a function that takes lists (e.g. {plus,plus,minus,0,minus,plus}) and uses the input list to calculate a corresponding value using a set of ...
53 views

### Choosing a List as VertexWeight for a TreeGraph

I would like to map every vertex of my TreeGraph to an List. ...
57 views

### My own discrete probability distribution [closed]

I have probability distribution in the table form. For example: X 2 3 6 -------------------- P(X) 1/2 1/3 1/6 How can I create this distribution ...
61 views

### Plotting and Analysing derivatives of solution of differential equation [closed]

Using NDSolve I found the solution for the differential equation that governs the dynamics of a simple pendulum. How do I plot the derivatives of the solution? Also, I would like to find the ...
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### Fitting data with inclusion of constraints

How do I find a fit for the dataS (see below) with the constraint that the parameter np is an integer, and that the parameters la+lc = 100. A weak attempt at this is provided below for a specific ...
55 views

### how to read an excel file using mathematica? [closed]

I have to do some data analysis and i have data in an excel file. Please tell me how to read an excel file in mathematica.
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### Visually Separating Cliques in Graphs

I have a graph with 189 vertices, more than 10,000 edges and 20 cliques. As one can imagine, this graph is a mess when trying to display it. I'd really like to display the graph, separated into ...
36 views

### Transform NMinimze into LinearProgramming formulation

I have the following maximization problem that I currently try to solve with Minimize/NMinimize. Unfortunately, this kind of solution method takes really long for large systems of equations and ...
38 views

### I'm trying to use ParametricPlot but my graphs keep coming up blank [closed]

I'm just trying to do: ParametricPlot[{cos[t], sin[t]}, {t,0,2pi}] When I use 2pi, it says: Limiting value 2pi in ...
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### Single formula for this sequence [closed]

Consider the following sequence. 0, 1, 0, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, 0, 8 We can express this sequence by (an) where an=n/2 when n is even and an=0 when n is odd. Find a single formula for an ...