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Dana

Last seen: 7 meses ago Active since 2019

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Simulating a Continuous time markov chain
I don't know offhand of any non-homogeneous CTMC references, sorry. Regarding your case, this part of the help section regard...

10 meses ago | 0

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Simulate Continuous-Time Markov Chains
This code can be used to simulate continuous-time Markov chains

Manually write code for a Vector Autoregression
First off, the interior (j) part of your loop doesn't make any sense, for several reasons: (1) Everything inside that loop is b...

alrededor de 1 año ago | 0

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Speed up a programme with for loops?
You can vectorize this easily for huge computational savings: %% Using loops tic E0=10; A = zeros(10000,10000); for k...

alrededor de 1 año ago | 0

plotting real solution of matrix system - time issue
I may be misunderstanding things, but it looks to me like the equation you're trying (det(S)=0) to solve is an 8th-order polynom...

alrededor de 1 año ago | 0

Plotting a function of a function with piecewise limits
It's the x(t) that shows up in your definition of f_1: t is a vector of real numbers (including non-integers), so x(t) is not a ...

alrededor de 1 año ago | 0

How can I debug this?
The error is because if you end up in the "otherwise" case of your switch(B), the variable Position doesn't ever get defined, so...

alrededor de 1 año ago | 0

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Optimization Problem definition the function
When you do f = @(x) ... the variable f isn't a function, but a function handle, i.e., a sort of "pointer" that allows you to ...

alrededor de 1 año ago | 0

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Point registration - How to get the eigenvectors to have a consistent direction?
This isn't my area of expertise, but one simple "orientation" test is as follows. Consider two scalars and . One way to check w...

alrededor de 1 año ago | 0

Finite difference problem showing NaN value
When M>=2, in the last line of your code, Rt_inc(M+1)=(v-1)*(rt_inc(M)^2)*((rt_inc(M+1)-rt_inc(M))/dt)/Sr(M); because rt_inc(M...

alrededor de 1 año ago | 0

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How to calculate multiple array at once?
load NEEDHELP n = numel(TEST); meanVolt = zeros(1,n); for j = 1:n meanVolt(j) = mean(TEST(j).data.Voltage_measured(1...

alrededor de 1 año ago | 1

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Help with storing values for the loop I created want to store them with where they are located on the vector
Is this what you're after? vector = [4 1 6 9 2 1 8 3]; [sorted,sortinds] = sort(vector) sorted = 1 1 2 3 ...

alrededor de 1 año ago | 0

Finding specific peaks in noisy data
This exercise looks like it involves some subejctivity. For example, in the second plot, the "peak" on the left isn't really a p...

alrededor de 1 año ago | 0

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Reducing the number of count/values in each bin in MATLAB
In this line: Count_Liquid = (Count_Liquid + histcounts(CTT_liquid, Intervals_CTT)) the variable Count_Liquid is computed usin...

alrededor de 1 año ago | 0

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I'm Trying to run iterations until convergence.
Well, you haven't actually told us what the problem you're encountering is, but right away I can see several problems. First, yo...

alrededor de 1 año ago | 0

Out of memory when converting symbolic matrix into function or by simplifying it
First, it's worth pointing out that if you call whos, symbolic variables always show up as 8 bytes. That's not because that's li...

alrededor de 1 año ago | 0

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How to find the roots along a real line?
Numerical solvers are not guaranteed to find all roots of an expression. That's what's happening here. The algorithm vpasolve is...

alrededor de 1 año ago | 1

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How would one proceed to plot this?
What is u supposed to be? Some kind of vector you've previously defined? If so, and assuming u is a column vector whose j-th ele...

alrededor de 1 año ago | 1

Format a matrix with entries displayed as exact values
I'm not sure exactly what you're after. Here are some possibilities >> format short >> disp(AB) 0 1.0000 1.000...

alrededor de 1 año ago | 0

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How can I create different colors in the plotted chart for a lot of data
Are you trying to plot 70 different data series on the same plot? If so, Matlab's default color scheme won't give you 70 differe...

alrededor de 1 año ago | 1

how to find the next maximum value in column of the matrix which is different at the index of the first
I'm not aware of any built-in function. You'll probably have to write one yourself. Something like: function [mxs,mxinds] = mym...

alrededor de 1 año ago | 0

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Unable to perform assignment because the left and right sides have a different number of elements
Your varibles k1, k2, k3, and k4 are vectors, so when you do the line near the bottom of your loop Nw(i+1)=Nw(i)+step/6*(k1+2*k...

alrededor de 1 año ago | 0

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Impose to a vector not to have zero elements
speed(n,:)=max(sol.y(N+1,:)-sum(sol.y(N+2:N+n,:),1), 0);

alrededor de 1 año ago | 0

Working with complex numbers in the Symbolic Math Toolbox. Why does angle(A) returns atan2(sin(alpha),cos(alpha)) instead of just alpha?
This seems to be the result of a gap in MATLAB's symbolic logic. Your assumption assume(alpha>-pi & alpha<pi) should be enoug...

alrededor de 1 año ago | 1

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Trying to assign a 3x1 matrix to the 1st iteration of a for loop.
If y is an array that's tracking values of a 3-element vector as you iterate on k, then you need to make y a matrix. If I've und...

alrededor de 1 año ago | 1

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Displaying output for each iteration
It's printing on every iteration, it's just printing it all on one line so it looks like only one thing is getting printed. The...

alrededor de 1 año ago | 0

how to solve this system of equation? (not sure what it's called/)
syms fo fa n t % note you had f0 instead of fo here in your original post eqn1 = fo*cosd(t)+fa*sind(15)==0; eqn2 = fo*sind(t)...

alrededor de 1 año ago | 0

Sparse matrix multiplication complexity and CPU time
Assuming by A^T you mean the transpose of A, and assuming you already have A and A^T stored, then yes, the complexity of A^T*A s...

alrededor de 1 año ago | 1

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