Standard deviation, MATLAB in Mathematics

Standard Deviation

The standard deviation is the square root of variance:

683_standard deviation.png

The built-in function in a MATLAB for the standard deviation is known as std; the standard deviation can be found either as the sqrt of the variance, or by using std:

>> shortx = [2 5 1 4];

>> myvar = var(shortx)

myvar =

    3.3333

>> sqrt(myvar)

ans =

    1.8257

>> std(shortx)

ans =

    1.8257

Posted Date: 10/22/2012 7:00:45 AM | Location : United States







Related Discussions:- Standard deviation, Assignment Help, Ask Question on Standard deviation, Get Answer, Expert's Help, Standard deviation Discussions

Write discussion on Standard deviation
Your posts are moderated
Related Questions
User-defined functions: Therefore, although many functions compute and return values, some do not. A few functions rather merely accomplish a task. Regardless of what type of

Labels and Prompts: The script loads all the numbers from file into a row vector. It then splits the vector; it stores the initial element that is the experiment number in a v

Fliplr function: The fliplr function "flips" the matrix from left to right (in another words the left-most column, the first column, become the last column and so on), and the

Empty Vectors: An empty vector or in another words, a vector which stores no values, can be generated using the empty square brackets: >> evec = [] evec = [] >> lengt

Illustrations of Variable number of output arguments: In the illustrations shown here, the user should actually know the type of the argument in order to establish how many va

Applications of Customized Strings: Labels, Prompts, Arguments to Functions: The one of very useful application of this is to involve numbers in strings that are used to plot

The variance is generally defined in terms of the arithmetic mean as: At times, though, the denominator is defined as n instead of n - 1. The default definition used by t

Complex numbers: A complex number is commonly written in the form z = a + bi here a is known as the real part of the number z, b be the imaginary part of z, and i is √-1

Customizing Plots : There are numerous ways to customize figures in the Figure Window. On clicking the Plot Tools icon will bring up the Property Editor & Plot Browser, with ma

Strings as Vectors: The Strings are considered as vectors of characters-or in another words, a vector in which each and every element is a single character-so numerous vector