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Loop / Repeat if random number = 0
Try n = round(200*rand); while (n == 0) n = round(200*rand); end Or, even better, n = randi(200); % gene...

más de 13 años hace | 1

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How can i calculate e^A*t
Use the expm function for computing a matrix exponential

más de 13 años hace | 10

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Deleting similar rows in Matrices contained in cell
If I understand your objective, try the following arrayOfElements = ['a','b','c','d']; % your initial array indicesOfUni...

más de 13 años hace | 0

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Masking out Image area using Binary Mask
Let I be the m-by-n image, and let M be the m-by-n mask. The new image, Inew, will be m-by-n and have zeros everywhere there ...

más de 13 años hace | 14

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Surf z axis not visible
After issuing peaks issue the command zlabel('z')

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RESAMPLING DATA
One way: numData = xlsread('yourExcelFile.xlsx'); % read in data numDataOut = numData(1:15:end); % subsample (get every ...

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compute the unit vector given the angle
Given the angle theta in radians (counter-clockwise is positive theta, theta = 0 points in the positive x-direction) you...

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I am writing code for a function but I get an error message
Just replace && with & and double pipes | | with | to operate on nonscalars.

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merge number and character
If x = 3; y = '-'; merge with [num2str(x),y]

más de 13 años hace | 1

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dividing a matrix into equal submatrices
I assume that your vector, x, is n-by-1 where n is divisible by 10. Try xIntoTenPieces = reshape(x,[],10); which p...

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Problem with the mean function
Try this meanWithoutNans = mean(refoulement(~isnan(refoulement)));

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Count number of specific values in matrix
Try this: numberOfNonZeros = nnz(m==4); Using nnz is more efficient than converting logicals to numeric, which is requir...

más de 13 años hace | 18

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Operate on Successive Values Without Loops
Totally... first arrange your vectors as column vectors, then try distance = sum(sqrt((x(1:end-1)-x(2:end)).^2 + (y(1:end-1...

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Attempt to have a 3D mesh plot of max value of real part of eigenvalues of a matrix. Shows error saying that 'Error showing Horzcat. CAT arguments dimensions are not consistent' even though my matrix is square.
When you create BKm, you use the output k from meshgrid. The output k is a 1001 square matrix that you are effectively trying t...

casi 14 años hace | 0

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still not getting the oop concept... please help
You can get the behavior you want if you subclass the handle class. To do this, 1.) replace the line classdef manlists ...

casi 14 años hace | 1

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matlab trick
I'm assuming the images all have the same extension and that the file format is supported by imread. Also, I'm assuming that th...

casi 14 años hace | 0

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Integral of sin(cos(x))
Ultimately, are you trying to compute a definite integral? If there are limits, you may be able to use Bessel functions to eval...

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how to click a point in an image
Check out the function ginput doc ginput

casi 14 años hace | 0

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equality operator between matrix and scalar
The value .1 and a(12) differ by only one bit as a result of numerical round-off. You can see this with the commands num2h...

casi 14 años hace | 1

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Assigning time points on X axis
If your sampling frequency is 44.1 kHz, then one millisecond comprises 44.1 time samples. So, if x represents the vector of 18,...

casi 14 años hace | 0

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Sorting NaN
This will work newA = a; % copy original matrix isANanRow = any(isnan(a),2); % find rows that have a nan in them % mo...

casi 14 años hace | 0

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Transforming uniform variables to normal variables
You know that the histogram shouldn't exactly match a Gaussian... Nevertheless, if you use the command above, you are guaranteed...

casi 14 años hace | 0

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Transforming uniform variables to normal variables
I will assume that your uniform random variables are stored in an array just like the one created with the commands X = ran...

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Using a variable in a matrix then plotting one element of the matrix.
When matlab sees A.*B or A.^B the two arrays A and B need to be the same size. In the expression Z = -M.*Om.^2 + i.*Om.*C + K, ...

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Recursive relation
First, if y depends on the variable x, it would help if you renamed the coefficients in the power series expansion for y from x_...

casi 14 años hace | 0

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Recursive relation
If I assume a power series solution of the form y(x) = \sum_{k = 0}^\infty\alpha_kx^x, I arrive at the recursion (n+1)\...

casi 14 años hace | 0

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How to reshape a cell array of cell arrays
I assume your 1-by-10 cell is just like the 1-by-10 cell C created with the commands C = cell(1,10); for i = 1:10 ...

casi 14 años hace | 6

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Quickly converting country names to numbers
I assume your table is a n-by-2 cell array, where the first column contains cells whose contents are the names of each country a...

casi 14 años hace | 1

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MATLAB Matrice Function Question help please?
It's a toeplitz matrix... so use the command toeplitz(0:4) to recreate your example. I'm sure you can extrapolate to t...

casi 14 años hace | 2

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vectorizing nested loops
Sorry, but I don't have a suggestion to vectorize this thing. However, as the following code demonstrates, it looks like you co...

casi 14 años hace | 1