Visual Studio Coding (R)

In this employment, you conciliate production after a while rivers grounds. The grounds pertain to the tediousness of superior North American rivers, and it is built-in grounds in R. You can approximation the grounds by typing: 

> rivers 

Your undertaking is to set-up a duty that income illustrative statistics for divergent inputs. The duty is determined illustrative_duty and has three controversys (i.e., another designate of inputs). 

descriptive_function(list, char, num) 

The requirements of the duty are as follows: 

· The duty has three controversys. The highest controversy is a inventory of quantity in doubles. The second controversy is a capacity, and the developed controversy is a sum. 

· If char is ‘m ’, the duty prints the arithmetic average of the inventory. 

· If char is ‘v’, the duty prints the hostility of the inventory. 

· If char is ‘s’, the duty prints the plummet flexion of the inventory. 

· If char is ‘z’, the duty prints the z-score of num after a while regard to the inventory. 

· You can use built-in R dutys including average(), var() and sd(). 

Sample ordeal cases: 

> illustrative_function(rivers, 'm', 7) 

[1] 591.1844 

> illustrative_function(rivers, 'm') 

[1] 591.1844 

> illustrative_function(rivers, 's') 

[1] 493.8708 

> illustrative_function(rivers, 'v', 8) 

[1] 243908.4 

> illustrative_function(rivers, 'z', 8) 

[1] -1.180844

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