standard deviation in matlab

To compute the standard deviation in MATLAB, you can use the std() function. This function can be used to compute the standard deviation of a set of numbers or a matrix of numbers.

Here is an example of how to use the std() function in MATLAB:

main.m
% create a vector of numbers
x = [1, 2, 3, 4, 5];

% compute the standard deviation of x
s = std(x);

% display the result
disp(s);
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In this example, we create a vector of numbers x. We then compute the standard deviation of x using the std() function and store the result in a variable s. Finally, we display the result using the disp() function.

You can also use the std() function to compute the standard deviation of a matrix by specifying the dimension along which to compute the standard deviation. For example:

main.m
% create a matrix of numbers
A = [1, 2, 3; 4, 5, 6; 7, 8, 9];

% compute the standard deviation of each column in A
s = std(A, 0, 1);

% display the result
disp(s);
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In this example, we create a matrix of numbers A. We then compute the standard deviation of each column in A using the std() function and specifying the second argument as 0 and the third argument as 1. We store the result in a variable s and display the result using the disp() function.