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Strange output from symbolic calculation
This isn't strange at all. You are asking the Symbolic Engine to examine all floating point expressions involving pi, which isn'...

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I keep getting an error?
Generally, these types of problems are solved by extracting the contents of the cell instead of using the cell itself. E.g., C ...

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3D sparse matrices
You can use the ndSparse FEX submission by Matt J: https://www.mathworks.com/matlabcentral/fileexchange/29832-n-dimensional-spa...

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Convert Fortran to MATLAB
Here is the equivalent MATLAB code: NB = 100; F = 0; for i=1:NB % [some equations] if( abs(xm) < wm ) ym ...

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What is the difference between a^3 and a.^3 if a is a matrix?
E = C^3 is a matrix power, equivalent to E = C*C*C, where these are all matrix multiplies. D = C.^3 is element-wise power, wher...

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Need Help for the rest of this coding
This is very basic vector construction and indexing. I suggest you take the MATLAB Onramp tutorials found here: https://www.mat...

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Malfunction to my matrix calculation
K .* F (with the dot) does element-wise multiplication with implicit array expansion if the variables are different sizes, thus ...

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How do I write this c++ for loop statement in Matlab for loop?
E.g., using a while loop (changed max and min to maxx and minn): x = j; while( maxx >= minn && x <= m+r ) % body of loop ...

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why my matlab code calculates the inequality wrongly?
Negative numbers are not greater than positive numbers. This is the correct result. What is strange to you about this?

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RK4 Method for Windkessel error
Multiple errors. When you call your function handle f, it is assumed that the P and Q are values passed at time t. They are not ...

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Use a for loop to determine the sum of the first ten even terms in the series 5k3 (k=2, 4, 6, ….)
You are summing all the terms with 2:10. For the "even" terms you need to skip the odd ones, so the range would be 2:2:something...

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Polt an object in uniform circular motion with Euler method
So you have made a good start, but you have errors in your derivatives ... why do you have t's in your derivative equations? The...

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How to solve a non-linear system of differential equations?
Your equations are linear in the derivatives, so you can form your equations as a matrix equation, then write a derivative funct...

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What do I need to change to get my Improved Euler's to match my Euler's?
Your current code is hard to read and debug because you have multiple variations of this expression scattered throughout your co...

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How do i use fminsearch to find the minimum or maximum of a function . x.^4-3.*x.*y+2.*y.^2
You need to have your function handle accept a vector and return a scalar. I.e., the x argument to the function handle is a vect...

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Optimization of Rocket Launch
You have proposed work that IMO is way beyond what is achievable with your code. Constrained optimization of this sort is not tr...

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how to split a string (char value) with zero in front of it but showing the value in the matrix?
Two more ways: S = '0100'; S=='0' % logical result S-'0' % double result

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Manual MEX vs MEX by codegen
MATLAB does not publish the "rules" that Codegen uses to generate mex code. Because it is automated, I am not surprised that the...

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Solve 2nd order ODE using Euler Method
You start your loop with i=1, but that means your x_d(i-1) will be x_d(0), an invalid index, hence the error. You need to set in...

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Finding a single root of x^(3.6)=75
Make a function handle with the @ operator. E.g., fun = @(x) x^(3.6)-75; x0=3; z = fzero(fun,x0) Check z^3.6 Or you can r...

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Need to find dot product between two second order tensor
If you change the inner loop calculation to this: w(i,k) = dot(S(i,:),u(:,k)); then you would have dot products between the S ...

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linear combination of vector and permutation
Another way very similar to Torsten's method, limited to two desired values: n = 3; 2*(dec2bin(0:2^n-1)-'0')-1

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Use trapezoidal method to find the deflection at each measurement point.
Sounds like you want the cumtrapz( ) function. If the assignment requires you to use loops, just code up the formula found in th...

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How to convert decimals to Ascii characters?
Your table isn't ASCII encoding of characters, so you can't use simple functions such as double( ) etc. You are probably going t...

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Trapezoidal numerical integration using for loops
See the Trapezoidal Method section here for the fomula: https://www.mathworks.com/help/matlab/ref/trapz.html?searchHighlight=tr...

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a)Extract the data from the two columns into separate arrays named time and distance. b) Determine the velocity and acceleration of the rocket. Use a FOR loop or as many as d
Hints for using a difference method: Velocity = Position / Time Acceleration = Velocity / Time To get the delta values, just...

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Change of position of velocity vectors and time interval between the change
Looks like an orbit problem. Around the Earth, I presume? You will not be using the Symbolic Toolbox for this assignment. You w...

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Any comment to speed up the speed of caculation of symbolic loops having Legendre polynomials?
The Symbolic Toolbox is going to be slower than IEEE floating point ... that's just something you have to accept. And if you nee...

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Formula for norm(x)
This question appears to be a follow-up to this post: https://www.mathworks.com/matlabcentral/answers/1809695-what-exactly-norm...

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what exactly norm(x) function do?
The equivalent function to norm( ) for a complex column vector x is sqrt(x' * x) where x' is the complex conjugate transpose. ...

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