Answered
Make array with elements repeating as many times as specified in another list.
a{1} = [1, 2, 4]; a{2} = [5, 3, 8, 9]; a{3} = [2, 6, 3, 7, 8, 1]; y_val = repelem(1:length(a), cellfun('length', a))

2 years ago | 2

Answered
Adjacency matrix.I want to simply the code .
n = 10; x=accumarray([2 3 n-1 n]',1); B = toeplitz(x,x); G=graph(B); plot(G)

2 years ago | 0

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Answered
Generate random integers that sums to a specific number within a specific range
Revisit this old thread here is the randfixedsum version but for integers. It's a quick implementation and it is slow, but math...

2 years ago | 1

Answered
Move a Point on a 3D surface
% Generate test mesh x = 1:15; y = 1:15; [X,Y] = meshgrid(x,y); Z = peaks(15); F = delaunay(X,Y); % Your points to be p...

2 years ago | 0

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Answered
How can I extract multiple rows from an array at regular intervals?
No need for reshape and repmat, etc... A = reshape(1:720, 72, 10); B = A((0:12:66) + (1:6)', :) % 66 is size(A,1)-6

2 years ago | 2

Answered
how to write all the for loop outputs in a single vector
function y = everyOther(x) L = length(x); i = 1:2:L; y = zeros(size(i)); for j = 1:length(i) y(j) = x(i(j)); end end

2 years ago | 0

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Answered
I don't want any imaginary number , and I don't want any negative number in my matrix, but none of MathWork can even answer it.
Just add the max statement to clamp the variable nu01 whenever you set nu01 (2 places): nu01(1,w+1,z) = ...; nu01(1,w+1,z) =...

2 years ago | 1

Answered
converting matlab into python using an official matlab add on
Not official but recently I need to do conversion of a small function, and ChatGPT works great.

2 years ago | 0

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Answered
Is it possible to restore all the variables from the previous session?
Unfortunately no. It's up to you to regularly save the intermediate results and make you program able to warn start from where ...

2 years ago | 0

Answered
Which method I can use for reduce number of samples or Increase the samples?
Take a look at interp1 https://www.mathworks.com/help/matlab/ref/interp1.html

2 years ago | 0

Answered
Fastest way to convert nested cell arrays into a Matrix?
If the deep nested arrays are column vectors Tmp=cat(2,ExampleCellArray{:})'; OutputMatrix=reshape(cat(2,Tmp{:})', [A_Length B...

2 years ago | 0

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Answered
How can I do to break this while loop with the keyboard?
Try this test function test fig = uifigure(); ax = uiaxes('Parent', fig); h = plot(ax, NaN); stop = false; function...

2 years ago | 1

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Answered
scatteredInterpolant gives out NaN in some query points
Probably your data contains NaN at one or several points. I don't quite understand your code datau.Value seems not valid sin...

2 years ago | 0

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Answered
Why the calculation error enhances as the phase angle increases when using atan2?
It doesn't seem weird to me. Both of the (atan2+unwrap) and (sin+cos) do somekind of undo modulo 2*pi differently. unwrap make...

2 years ago | 0

Answered
Nested parfor effecting fprintf?
I add this line before the IF test something = rand() < 0.01 if(something) break end it works for me, my command window...

2 years ago | 0

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Answered
All combinations of a data set without mixing data across arrays
If you have R2023a use the stock combinations function Var1 = [1400, 1700, 1900]; Var2 = [1340, 1680, 1900, 1871, 789]; Var3 ...

2 years ago | 0

Answered
Discrepancy between local maxima of cfit and global minima in second derivative
You missunderstand and missinterpret the second derivative. At the local minima the first derivative is 0 and the second deriv...

2 years ago | 1

Answered
how can i vectorize it?
If you prefer ugly and unreadable code %I BUILD DATA IN THIS EXAMPLE row=10; col=8; profit = rand(row,col); c3 = randi(si...

2 years ago | 1

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Answered
Solving an overdetermined linear system
least square solution syms e0 e1 e2 T1=1; T2=3; T3=4; T4=5; T5=6; TM1=8; TM2=7; TM3=6; TM4=5; TM5=4; Eqns = [e0 + T...

2 years ago | 0

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Answered
Reshape matrix dimensions to a larger and sparse one
A = [0.8147 0.1576 0.6557 0.7060; 0.9058 0.9706 0.0357 0.0318; 0.1270 0.9572 0.8491 0.2769;...

2 years ago | 0

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Question

When assignment is allowed?
The question concerns the requirement of the sizes of the assignment between two arrays. To my great surprise this is allowed ...

2 years ago | 1 answer | 1

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answer

Answered
How to use "eig" function in optimproblem?
Put whatever you want to compute (with eig) in a standard matlab function (e.g., in an mfile) then use fcn2optimexpr to convert ...

2 years ago | 0

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Answered
Efficient and quick way to summation of large data points
instead of doing over and over (in the loop on the bottom) such calculation sum(omega(i1:i2)); you could do once the cumulati...

2 years ago | 0

Answered
i just want to know the given code is correct or not.
Replace the calculation with epsilon_complex = (epsilon_inf + sum(A ./ (C.^2 - E^2 - 1i * v * E))); epsilon_real = real(epsilo...

2 years ago | 0

Answered
How I would determine if a string contains multiple substrings?
myString = "This has some words in it."; subStrings = ["This","some"]; hasAllSubstrings = isequal(regexp(myString, subString...

2 years ago | 2

Answered
Implement the "total variation distance" (TVD) in Matlab
Supremum is very often implemented by max, since one can only list or compute a finite set on computer. However your formula d...

2 years ago | 1

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Answered
Error using .' TRANSPOSE does not support N-D arrays. Use PAGETRANSPOSE/PAGECTRANSPOSE to transpose pages or PERMUTE to reorder dimensions of N-D arrays.
Your image I is 3D RGB not 2D so you have to do 2D interpolation page by page for k = size(I,3):-1:1 I2(:,:,k) = interp2...

2 years ago | 0

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Answered
Calculating the area of overlapping polgyons
Is it what you want? (I'm not sure about the desired output if polygons are not hierachical included to each other, see variant ...

2 years ago | 0

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Answered
Can't find references for lqr.m
https://www.mathworks.com/products/control.html

2 years ago | 0

Submitted

randinrc
randi with non-repeat constraint.

2 years ago | 1 download |

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