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How do I find the first value (in a vector) larger than a cutoff value without using for/while loops?
v(find(v > cutoff, 1))

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problem in writing matlab code (To Plot)
K = 1; x = linspace(-100,100); A = K/2*(1 + cos(x)); A(x<=0) = 1; A(x>=50) = 0; plot(x,A)

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Hello everybody, my output is a structure like Run = theta: {1x10 cell} sigma:{1x10 cell} I want to compute the mean of theta and sigma. I would be grateful if you could lead howI should do that?
mean(cell2mat(Run.theta)) mean(cell2mat(Run.sigma)) You could also rewrite your program and return a 10x2 matrix Y with th...

casi 11 años hace | 0

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RGB values in a YUV colorspace image
imshow treats the image as an RGB image. If it is not, e.g., if some values are negative, these values are set to 0. Note that i...

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How can I calculate average values of one data according to specific indexes of same size?
X = [1 1021.714 1 1021.726 2 1021.736 2 1021.743 2 1021.749 2 1021.755 2 1021.760 2 1021.765 3 1021.7...

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How can I write a mathematical function in Matlab?
If X take some values and you make sure that the e and p parameters are in the order of pairs, e.g., for N = 3 1 2 1 ...

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Parallel program required to be fixed for last couple of lines due to extensive time-consuming for saving variables in 3 by 3 matrix
If is more efficient if you allocate Ex, RondF_RondEta and RondF_RondZeta before the loop: Ex = nan(1, TotNu); RondF...

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I have a string with the form of that of what you would write to initialize a matrix; how do I make the string a matrix?
myStr = '[1,2,3, 5:7]'; eval(['A = ' myStr ';']);

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how do i remove this error? Function definitions are not permitted in this context.
You can write it w/o a function, and you don't need the inner for j= ... loop: for day=1:10 %// Generate 3 particles ...

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Two times fft of the signal
Yes. It's a property of the Fourier Transformation: the FT of a box is a sinc, and the FT of a sinc is a box. So if you compute ...

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Dots!, Dots!, Dots! What are they doing!?
help punct gives you ... Continuation. Three or more periods at the end of a line continue the current comman...

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Extract the number within the bracket
This extracts all digits and all '.' from a: numstr = a(regexp(a, '[\d\.]')) This extracts all numbers between ( ), where...

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finding specific values' rows numbers in an array
find(a==4) find(a==7)

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I don't know this watermarking code~ please explain code~
You can download the full example from http://www.mathworks.com/matlabcentral/fileexchange/45051-color-dwt-image-watermarking ...

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How to calculate zero mean and unit variance for entire vectors in a folder?
1. Determine all excelfiles in the folder (hint: d = dir(',', '*.xls')) 2. loop over all these files and 3. read file (h...

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How to allocate variables
Assuming that your L is a matrix, you simply store the ith L as allL(:,:,i) = L; To make the code more efficient, you...

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HELP to resolve this code
function d = brightnessdiff(I1, I2) d = rgb2gray(I1) - rgb2gray(I2);

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Approximate Entropy Calculation for an Image
function E = entropy(I) % Assume I in the range 0..1 p = hist(I(:), linspace(0,1,256)); % create histogram p(p==0) =...

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How to convert a vector into bitstring?
Vector = [255 1 0]; reshape(dec2bin(Vector)', 1, [])

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How to run a function?
You have defined your function f with a single argument x but you call it with two arguments x(1) and x(2) in using fx=feval(f,x...

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How can i assemble a 4x4 matrix into a 12x12 matrix (Stiffness Matrix)
To get the first submatrix, you can use k1= [1 2 3 4; 5 6 7 8; 9 10 11 12; 13 14 15 16]; u = 2; v = 4; X = zeros(1...

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is it possible to plot and save figure in console mode?
x = 1:10; y = x; h = plot(x, y); % Save plot in png format using hgsave hgsave(h, 'sample.png');

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problem in ycbcr color space
You have some error in your formula. RGB values in the range 0, 255 or R'G'B' values in the range 0..1 map to non-negative YCbCr...

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What should i use if i dont want to perform any operation?
You can rewrite your if-clause as if condition1 operation1 elseif ~condition2 operation3 end

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Adding two functions to 1 m-file, while making variables in the two functions accessible to both?
Define function F1 and use the matrices read by F2 as the default arguments. function Y = F1(A1,A2) if isempty(A1) && is...

alrededor de 11 años hace | 0

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How to randomly select n number of pixels from an image whose value is one and change those pixels value to zero?
ind = find(I == 1); r = randperm(numel(ind)); r = r(1:n); I(ind) = 0;

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Why does Matlab give different eigenvalues for the same matrix?
Are you 100% sure that you used the same matrix for your computations?

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How to randomly select n number of pixels from an image whose value is one ?
ind = find(I == 1); r = randperm(numel(ind)); r = r(1:n);

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Error: Attempted to access E(-251); index must be a positive integer or logical
In Matlab the indices have to be integer numbers > zero. So if you use E(i) = sqrt(mean(deviation)); A(i) = mean(snip...

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How do I Generate a binary image from first principles?
So far you use fill to plot the region. But that's in a figure, not an in an image. For example, to generate a binary image w...

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