Questions tagged [discrete]

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1answer
29 views

How can I use the DiscretePlot and LogPlot?

I am really new to mathematica and this will seem very basic, but the two last lines of the code do not work (the two prints work just fine), it gives me the error more input is needed(only for the ...
3
votes
2answers
51 views

Coloring DiscretePlot3D according to min

I have two discrete functions, which I'll greatly simplify for this question: RedFnc[i_, j_] := 1 + i + j; BlueFnc[i_, j_] := 1 + (1 - i) + (1 - j); I am ...
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0answers
46 views

phase portrait discrete system

I've tried to see the phase portrait of the systems using Mathematica but I could not I need help with the code: x(n+1)=2x(n)+4y(n), y(n+1)=-x(n)-2y(n) and this system: x(n+1)=x(n)^2-y(n)^2, y(n+...
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0answers
26 views

Problem when integrating a discontinuous function

I have this simple code: ...
1
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1answer
50 views

Cumulative difference between discrete cumulative distribution functions

I would please like to ask for how to cumulate and plot the difference between cumulative disitribution functions (:=CDFs). Example: ...
6
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5answers
396 views

A replacement for NextPermutation in Combinatorica [duplicate]

Does anyone know of a replacement for NextPermutation in Combinatorica? The problem with loading Combinatorica is that it interferes with new functionality which I ...
7
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0answers
42 views

Is there a multidimensional FindSequenceFunction for multi-parameter pattern discovery?

FindSequenceFunction is a great tool for discovering formulas of sequences depending on a single index. OEIS is another tool for the case of integer sequences ...
5
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2answers
416 views

NonlinearModelFit when the fitting function produces a discrete list of values?

Short Version: I have a parameterized function (the model) that returns a list of values. I have data that I want to fit this model to, optimizing those parameters, where the list position in the data ...
1
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2answers
42 views

How to use a given list of values for a parameter in FindInstance?

How should I specify a discrete range for a parameter as one of the conditions in FindInstance? MemberQ/Element functions don't seem to work. For example, ...
1
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0answers
30 views

Discrete variables in ParametricNDSolve [closed]

I'm trying to write a stochastic differential equation, using ParametricNDSolve and WhenEvents : ...
2
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0answers
49 views

BinarySearch Built-in and BinarySearch1 Self defined help [closed]

I am trying to create my own binary search to compare with the built-in function. I have referenced the docs, but the output is not correct and implies an issue. Please help with my function syntax ...
0
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1answer
81 views

Create Poisson distribution

I would like to make a phone call at the average arrival rate of λ = 300 [call / minute] per minute in the Poisson distribution of the telephone exchange and save it on the list. I don't know even if ...
3
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1answer
64 views

FindGeneratingFunction gives up too easily [closed]

I am trying to automatically find a generating function from the coefficients of a simple rational function using Mathematica's FindGeneratingFunction: ...
1
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1answer
431 views

How to define a function only for integers

I want to create a function which only accepts integers. if a value other than integers are given it should output zero. This is what I've tried so far. I'm trying to do some discrete time signal ...
7
votes
2answers
312 views

Record Statistics for Discrete Random Walks

I code a random walk of length 100 drawn from a LaplaceDistribution: Accumulate[RandomVariate[LaplaceDistribution[0, 1], 10000]] I am having trouble counting the ...
5
votes
4answers
105 views

Plotting displacement values over defined region

I have a deformed 2D region of triangular Elements specified by their Nodes in $x$ and $y$ coordinate system. In addition, I ...
1
vote
1answer
71 views

Assignment to slots with inequality constraints

Suppose that I have a table A with each of its n columns corresponding to an "individual" and each of its m rows corresponding to a "task". The element of the jth ...
2
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1answer
221 views

Convert DiscretePlot3D to 2D plot with a Color Function

Observe the following wolfram Mathematica code: ...
1
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1answer
292 views

Flat line in Plot PDF of empirical data

I am currently trying to plot the probability density function PDF of an empirical data set. However, unfortunately, I always receive just a flat line in the ...
0
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1answer
88 views

Plot on a range by using restricted number of points [closed]

Suppose some function. I need to plot it on the given range, but using the finite number of points. After that I need to approximate obtained discrete plot by the curve. Is it possible to do this?
0
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0answers
130 views

How to fit one discrete data set to another with shifting and tilting?

I have two sets of discrete experimental data, each data set consists of many {x,y,z} positions. Both data sets have overlap region; you can merge both data sets together with shifting and tilting one ...
0
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1answer
179 views

Solving a system of differential equations including a discrete time function

Given a graph of $N$ nodes, I would like to solve the following set of differential equations: where $G_i'(r,s)\triangleq \frac{d G_i(r,s)}{ds} = \Big(1-L_i(t) - I_i(t)-B_i(t) - C_i(t)\Big)\sum_{j=1}^...
2
votes
2answers
90 views

Producing a particular sequence of integers recursively [closed]

I am supposed to write a function which computes the next integer in a sequence from the given one. For example: nextval[57] should give mm ...
1
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0answers
162 views

Find wavelet transform coefficients in L1 norm [closed]

For my masters task I have to perform a Haar wavelet transform using an L1 norm. But Mathematica's built-in wavelet library can work only with L2 norm space. I tried to do this: ...
1
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1answer
287 views

ListConvolve returns only one value

Generating my first function ...
2
votes
1answer
164 views

Multiple discrete RV convolutions performance

I have a discrete random variable with PDF of (just a simplified example) Piecewise[{{1/3, x == 5 || x == 10 || x == 15}}, 0] Actually, in my code this is a <...