create a for loop for standard deviation and mean in matlab

Here is an example of how to calculate the mean and standard deviation using a for loop in MATLAB:

main.m
% Define an array of random numbers
data = rand(1, 10);

% Calculate the mean using a for loop
sum = 0;
for i=1:length(data)
    sum = sum + data(i);
end
mean = sum/length(data);

% Calculate the standard deviation using a for loop
sum = 0;
for i=1:length(data)
    sum = sum + (data(i) - mean)^2;
end
std_dev = sqrt(sum/(length(data)-1));
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In this example, we first define an array of random numbers using the rand function in MATLAB. We then use a for loop to calculate the mean by iterating over each element in the array and adding it to a running sum. We divide the sum by the length of the array to get the mean.

Next, we use another for loop to calculate the standard deviation. We take the difference between each element in the array and the mean, square the differences, and add them to a running sum. We divide the sum by the length of the array minus one, and then take the square root to get the standard deviation.

Note that there are built-in MATLAB functions that can also be used to calculate the mean and standard deviation, such as mean and std.