Answered
how can i get value of y
You want to solve for y, as an implicit function of r? First, you should consider if a solution exists at all. Is it multi-valu...

13 days ago | 1

Answered
full rank left annihilator matrix
Are you asking to find a MATRIX B that will kill off A when you left multiply B*A? syms x1 x2 x3 x4 Cdc Cb Lcpl Vfc A=[Vfc/(x...

13 days ago | 1

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Answered
How to solve 3 differntial equation by Runge-Kutta 4th order
If you NEED to use Runge-Kutta, then this is a homework assignment, and you are not telling us, because you know that we don't d...

14 days ago | 0

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Answered
Support for older MATLAB versions on new operating systems
Um, lets be rational here. Can The MathWorks control how operating system X changes? They wrote their software to run on X, re...

14 days ago | 0

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Trouble using atan2 for coordinate transform, maybe recommend other tools.
The transformation you are using is a simple tranformation into polar coordinates. When you have y in there also, this becomes w...

15 days ago | 0

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code for a simple nanogram function
Now roughly a month since the original post, and nobody has answered. I was not sure if this could be a student problem, so I ga...

16 days ago | 0

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How can i define a m by n symbolic matrix?
If m and n are themselves symbolic, you cannot do so. However, you can do this: matfun = @(m,n) sym('a',[m,n]); Now you can us...

17 days ago | 0

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Answered
Accuracy of polygon approximation
R*2 is not remotely meaningful here, unless you find a way to intelligently extend it to this situation. I would probably find ...

17 days ago | 0

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Answered
Function value and YDATA sizes are not equal BUT THEY ARE
The expectation is that in the function (here, Cp) the data vector should be the SECOND argument. It needs to be Cp = @(x,T7)...

17 days ago | 2

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Answered
Help Finding Explicit Solution Non Linear Differential Equation
There is no assurance that ever nonlinear differential equatino you may choose to pose has an analytical solution. In fact, I no...

17 days ago | 0

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Which is the smallest natural number n to which it applies a(n)>10?
The obvious answer is brute force, thus... a_i = 1; a_iplus1 = 1; plot(a_i,a_iplus1,'o') hold on iter = 2; imax = 1e6; wh...

17 days ago | 1

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How to draw a line on a symbolic surface
syms x1 x2 f1 = x1^2+x2^3-9 fsurf(f1); hold on fimplicit(f1,'r') WTP? :)

17 days ago | 0

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Answered
Trying to do product of eigenvalues collected from a matrix
You don't want to use the product of eigenvalues to determine if a matrix is singular. This is equivalent to computing the deter...

19 days ago | 1

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Output vector in the polyval
format long g p=[1 0 0 0 0 -5 3 21]; x=[10 15 20]; poly_value=polyval(p,x) poly_value = 9999551 170858316 ...

19 days ago | 0

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Answered
Quadratic/Exponential Best Fit Curve
First, you have 4 data points. Trying to fit a degree 7 (SEVEN) polynomial to that is just silly. Yes, you say quadratic. But yo...

20 days ago | 0

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Why are alternative forms for "dbstop in file at location if expression" not documented?
All commands in MATLAB are actually implemented as functions. There is a command/function duality in existence. So you can alway...

20 days ago | 0

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Answered
How to adjust a cloud point to meet the minimum distance requirement?
Sorry, but no. There is no analytical solution that would provide the clustering that you wish to achieve. You can use clusterin...

21 days ago | 0

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how factor a polynomial into 2 quadratics?
You cannot uniquely factor a 4th degree polynomial into such a pair of quadratics. You may think that you can, but it is provabl...

21 days ago | 0

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Answered
seven roots of an equation
Your equation is: What you have done in code is terribly confusing. There is no need to use symsum. Can we assume that b is ...

21 days ago | 1

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Answered
How to get coefficient non linear fit?
% Make up some random data since you gave us none x = rand(50,1); y = 0.3*exp(-2.5*x) + 1 + randn(size(x))/50; plot(x,y,'.') ...

22 days ago | 0

Answered
A better way to do antidiagonal matrix vectorization?
This should not be that difficult. One trick might be to use ndgrid, and then a sort. For example, consider the function adunrol...

23 days ago | 2

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why in this function they use empty square brackets?
It is not a dumb question at all, because the syntax used by MATLAB to delete a row or column of an array may not be obvious. Bu...

23 days ago | 1

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What is the problem with my code? How to do integration of matrix which consists integral variable?
M is a SYMBOLIC variable. You use int to integrate it, not integral. syms x; M = [x x^2]; int(M,[0,12])

23 days ago | 0

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Answered
Subs with 2 numbers returns a number
Simple enough. Convert the original expression to a string. Now just do string processing, with finds and replace operations. C...

25 days ago | 0

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Solve second order non linear differential equation
You will not be able to use bvp4c directly, since it will use collocation. That will fail on an infinite domain. One option mig...

26 days ago | 0

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convert signal to morse code
As @dpb suggested: Use findpeaks to locate each peak. (Ignore the tiny ones. So anything that is significantly above the baseli...

26 days ago | 1

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Answered
Writing exponent in pplane for Matlab
pplane is not part of MATLAB, so it must be a package from the file exchange, or some other source. You might want to contact th...

27 days ago | 0

Answered
Assign the same variable to all elements of a Matrix
As with Matt, I have not used the code, but this should work. M = repmat(sdpvar(1,1),[10 10 10]);

27 days ago | 0

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Nested for loop to generate random matrix
No. That simply is not true, that only the first row and column are random. for i = 1:10; %Generates random angle for each par...

27 days ago | 1

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write a polynomial answer in one operand
I assume that is a prime outside of the parens, which makes no sense unless you intend it as the complex conjugate. But even the...

28 days ago | 0

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