describe(deprecated)/covariance - Help

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stats[describe,covariance] - Covariance Between Two Data Lists

Calling Sequence

stats[describe, covariance](data1, data2)

describe[covariance](data1, data2)

Parameters

data1

-

first statistical list

data2

-

second statistical list

Description

• 

Important: The stats package has been deprecated. Use the superseding package Statistics instead.

• 

The function covariance of the subpackage stats[describe, ...] computes the covariance  between two statistical lists.

• 

The two data lists must have the same number of observations, with the same weights for each corresponding elements.

• 

Let x[i] be the observations of data1, y[i] be the observations of data2, xmean be the mean of data1, ymean be the mean of data2 and N be the common number of observations. Then the covariance is defined to be i=1NxixmeanyiymeanN.

• 

If either of x[i] and y[i] is missing, then the corresponding term in the above sum is omitted.

• 

The covariance is used in the computation of the linear correlation. Refer to describe[linearcorrelation] for more information.

• 

Classes are assumed to be represented by the class mark, for example 10..12 has the value 11.

Examples

Important: The stats package has been deprecated. Use the superseding package Statistics instead.

withstats:

data1:=Weight3,10,4,Weight11,3

data1:=Weight3,10,4,Weight11,3

(1)

data2:=Weight1,10,3,Weight12,3

data2:=Weight1,10,3,Weight12,3

(2)

describecovariancedata1,data2

40728

(3)

See Also

describe(deprecated)[linearcorrelation], describe(deprecated)[standarddeviation], Statistics, Statistics[Covariance], stats(deprecated)[data], transform(deprecated)[classmark]


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