Answered
Changing the range of for loop give different result
You cannot create a matrix, whose elements are matrices. This works with a cell array: A = cell(r+1, k+1); for i = 2:r+1 ...

5 years ago | 0

Answered
Matlab如何将cell中的矩阵进行合并？
R = {[3;2], [3;5], [4;2], [4;5], [5;2]}; nR = numel(R); f = true(1, nR); for iR = 1:nR if f(iR) ...

5 years ago | 1

Answered
separate strings that are inside a cell
Your description is not clear yet. I dare to guess: % Input (thanks Adam): C = {"sdfsd"; "dare"; ["abs";"ses"]; "erwe"; "serwe...

5 years ago | 0

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Answered
error using "fread"
cd('E:/image_trans/Emis32_%d.bin'); This does not look like a valid folder name. Is there really a % character? Later on this i...

5 years ago | 0

Answered
Group values of a vector into new vectors according to magnitude
A = [17 323 100 3 278 220 45 351 212 51]; Y = discretize(A, [0, 50, 100, 360]) C = splitapply(@(x) {x}, A, Y)

5 years ago | 1

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How to convert to a parallel program?
Pre-allocation is essential. Do not let array grow iteratively, but create them with the final size: n = 41; h = 1 / (n...

5 years ago | 0

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Answered
How to select every 54th image in the folder?
A = 'D:\Your\A'; B = 'D:\Your\B'; AList = dir(fullfile(A, 'a*.jpg')); BList = dir(fullfile(B, 'b*.jpg')); nB = numel(BLis...

5 years ago | 1

Answered
Multiply cell by cell
Use a loop: for k = 1:numel(C_inside2) C_inside2{k} = C_inside2{k} .^ 2; end This is faster than cellfun: C_inside2 = ce...

5 years ago | 0

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Answered
How can I speed up (or avoid) a comparison in for loop?
What about omitting the loop: A(ismember(L, f)) = true; Or: LUT = [false, N < threshold]; A(LUT(L + 1)) = true;

5 years ago | 1

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Answered
downsample data adapively/"intelligently"
This is not a trivial problem. In the general case it is a global optimization problem and there can be a huge number of equival...

5 years ago | 2

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Answered
Speed Up the for loop
Fmt1 = '%6.2f \t %6.4f \t %6.4f\t %6.2f \t %6.2f \t %6.2f \t %6.2f'; Fmt2 = '%s \t %6.2f \t %6.2f \t %6.2f \t %6.2f \t %6.4f \t...

5 years ago | 1

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Answered
Error while recording using audio recorder object
record_file=getaudiodata(recorder); ffname = sprintf('%s%s',record_file); getaudiodata replies a numerical array with the sign...

5 years ago | 0

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Answered
What should go in a next-generation MATLAB X?
A complete list of changes for each command. Currently we find "introduced in Rxy" already, but modifications of inputs and out...

5 years ago | 8

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Avoid ode15s from freezing in parameter optimization
I've limite the time to [0, 15]. You see that one component explodes between t=15 and t=16. This let the step size of the integr...

5 years ago | 0

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How increase calculate speed in for loop
Start with a simplification of the code: Depth = 5000; Num_Alines = 400; Num_Bscan = 300; Alines = 180 h ...

5 years ago | 0

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How to add integers without correction?
a = int8(126); b = int8(2); tic for k = 1:1e4 c = bitadd1(a, b); end toc tic for k = 1:1e4 c = bitadd2(a, b);...

5 years ago | 1

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Answered
Solving a System of ODEs using Euler's method
Your function to be integrated depends on t also. You call this x in the Euler method. At is easier to use vector equations: f...

5 years ago | 0

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Matlab versions supported on Windows 11?
Windows 11 have not been officially released yet. We and MathWorks cannot know how the final version will work. There have been ...

5 years ago | 0

Answered
How to Copy Upper diagonal elements of matrix A into a new matrix.
A = [1 2 3 4; 2 1 3 4; 1 1 1 2; 1 0 0 1]; B = triu(A)

5 years ago | 0

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Answered
why are some integrals not solvable in matlab?
Is it a numeric or symbolic integration? Most functions do not have a closed form integral. This is a mathematical limitation. ...

5 years ago | 0

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Diagonals in Matrices Matlab
I'm not sure if I can follow your explanations. A short example might be useful. The term "be -.25 for every 2 instances" might...

5 years ago | 1

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Answered
I have 2011a on my machine. I installed 2014a. it is always running MATLAB2014a, how to select MATLAB2011 for running please?
How do you start Matlab? The exact method to start a specific Matlab version depend on the operating system. But the way is to i...

5 years ago | 0

Answered
Trying to use a for loop to calculate years with an IF statement but it seems to ignore it.
Either for M = 2:300 if balance(M) >= 50000 %balance(M) break; % Leave the for M loop end % NOPE ! M =...

5 years ago | 0

Answered
How to plot a smooth curve with only a few points?
Either decide for a linear interpolation: x = 1:6; y = rand(1, 6); plot(x, y, 'ko'); hold on xx = linspace(1, 6, 100); ...

5 years ago | 1

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Answered
Is rsqrt the same as Fast inverse square root?
i = * ( long * ) &y This is equivalent to: y = single(pi); i = typecast(y, 'int32'); The shown code of Q_rsqrt is an ap...

5 years ago | 0

Answered
I am getting Undefined function or variable 'A', error in Untitled line 95
The variable A should be polulated in this line: A(rr,:,z) = [sod,rangeL1,rangeL2]; If A in undefined, this line was not c...

5 years ago | 0

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Answered
ODE45 is taking hours and hours to compute
Symbolic omputations need a lot of time. Can you implement the code numerically? If the equation to be integrated is stiff, ODE...

5 years ago | 0

Answered
semilogy, loglog do not work in order to set the y axis on a logarithmic scale
After figure, hold on the YScale is determined already. Define it explicitly instead and you plot(): figure axes('yscale', 'lo...

5 years ago | 0

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Answered
About 3 significant digit?
fprintf('%.3g\n', pi) fprintf('%.3g\n', pi * 1e6) fprintf('%.3g\n', pi * 1e-6)

5 years ago | 0

Answered
"Too many output arguments" error while working with the fmincon solver inside the optimization tool.
A bold guess: [solution,objectiveValue] = fmincon(@objectiveFcn,w,[],[],[],[],[],[],... @objectiveFcn,options2); % ^^^^...

5 years ago | 0

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