Write a SINGLE LINE of code using MATLAB that computes the mean and standard dev

Question

Write a SINGLE LINE of code using MATLAB that computes the mean and standard deviation of a 1-dimensional array named A of numbers. You MAY NOT use loops, or the mean, variance, or stdev functions. Assume the array A has already been defined.

The mean is the arithmetic average of the values in the array.

The variance is the arithmetic average of the squared difference between each value and the mean.

The standard deviation is the square root of the variance.

Please post a screenshot of your answer and a copy of the code too.

Explanation / Answer

Here, sum(A) gives the sum of ll elements in array A,
numel(A) gives the length of array.
Therefore the mean is given by diving the sum of elements in array by length of array.

And, The standard deviation in one line is given by the square root of variance.
here variance is sum of square of difference between elements of array and mean,
divided by the length of array -1.
taking the square root of variance gives the required standard deviation.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.