Answered
Sorting large vector onto 2D grid
sz = [360 720]; ind_list = sub2ind(sz, row, col); for i = 1:360 for j = 1:720 index = 360*(j - 1) + i;...

13 years ago | 0

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Answered
Sorting large vector onto 2D grid
sz = [360 720]; ind = sub2ind(sz, row, col); values = zeros(sz); values(ind) = meas;

13 years ago | 0

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Clustering the image using k means
In your example, use kmeans(r, number_of_clusters)

13 years ago | 0

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How can I write and save *.txt file by the *.m file in the specific path like C:\folder1\rio.txt
fid = fopen('C:\folder1\rio.txt', 'w'); fprintf(fid, '%s', '0123456789'); fclose(fid)

13 years ago | 0

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Answered
plotting information that is above a certain threshold
If you want to plot the data above threshold, you can use dataset_new = dataset(find(dataset > 100)); plot(dataset_new...

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Answered
how to create a transparent sphere
[x y z] = sphere(128); h = surfl(x, y, z); set(h, 'FaceAlpha', 0.5) shading interp

13 years ago | 1

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Solved

Determine whether a vector is monotonically increasing
Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

13 years ago

Solved

Swap the first and last columns
Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

13 years ago

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Is my wife right?
Regardless of input, output the string 'yes'.

13 years ago

Solved

Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

13 years ago

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Add two numbers
Given a and b, return the sum a+b in c.

13 years ago

Answered
manually specify occourrences in bar graph
Sample values values = [1:4]; entropy = [1.8 1.9 2.1 2.2]; bandwidth = [18 2 10 11]; Plot the bars h = bar(va...

13 years ago | 0

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Store a number of calculations within a matrix
Store all results in variable R i = 1; while(time<1) R(i, 1 ) = time; R(i, 2) = Velocity(mass, viscosity...

13 years ago | 1

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Answered
Loop step size issue
This runs about 4 times faster on my machine: cS = cumsum(S); for K = 1 : ni sums = cS(ivals(K):end) - [0 cS(1:end-...

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peak of a graph
help findpeaks

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Need help with my image processing about circle detection
sigma = 5; % Gaussian smoothing, adapted to the size of the eggs thres = 0.9; % binary threshold, adapted to the brightness...

13 years ago | 0

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Answered
Loop step size issue
Walter's solution is more efficient. If you want to do it quick Output = nan(1, 100); % your code here Output = O...

13 years ago | 0

Answered
How to select files in a directory
% run once for, see if the 'move file' output is ok % if ok, uncomment the movefile line such that the files are actually m...

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how to shift arrays to the right??
arr = [round(rand(1,1)) arr];

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Answered
Insert data in a cell
for i = 1:numel(length) f{i, 3} = length(i); end

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Answered
If condition to check for contact of two balls
You forgot the "x = " in the third row. Should read x = get(h2(2), 'xdata');

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hello, i m new to matlab,,, plz help me ....how can we divide an image into overlapping blocks?
If your have a function FUN to be applied to each block, you can use B = nlfilter(A, [M N], FUN)

13 years ago | 0

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choose the 3 first lowest number in the cell after it sorted
reshape({f{end-2:end,:}}, [3 3])

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Insert data in a cell
f{2, 3} = length;

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choose the 3 first lowest number in the cell after it sorted
[f{end-2:end, :}]

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how to define the following function
if 0 <= x && x <= pi, y = 0; end

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Print to file a cell array of struct
save('myfile.mat', myCell)

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Answered
how to Sorting a cell?
[sorted ind] = sort([f{:, 1}]); f = f(ind, :)

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Problems with calculating Second derivative and SG smoothing
diff(x, 2) is just one way to numerically approximate the derivative. Origin may use a different method. The result by Origi...

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Simulating using random orthogonal matrices. How can i create a massive matrix from an equation containing several random matrices and fixed matrices?
for i = 1:N M = ... Q = ... L = ... R = ... An = ... if i == 1 X = M*Q*L*R*An; else ...

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