Calculating the variance-covariance matrix
Along with the mean, an equally important statistic for a multivariate observation is its variance-covariance matrix. The variance-covariance matrix generalizes the concept of variance to multiple dimensions.
Bu egzersiz, kursun bir parçasıdır
Multivariate Probability Distributions in R
Egzersiz talimatları
- Calculate the variance-covariance matrix of the first four numeric variables in columns 2 through 5.
- Round the values of the variance-covariance matrix to two decimal places.
Uygulamalı etkileşimli egzersiz
Bu egzersizi bu örnek kodu tamamlayarak deneyin.
# Calculate the variance-covariance matrix of the variables Alcohol, Malic, Ash, Alcalinity
var.wine <- var(___)
# Round the matrix values to two decimal places
round(___, ___)