R Dictionary PDF

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Summary

R dictionary- required dictionary of functions used in R studio ...

Description

Function

What it does

c()

Creates a new vector by combining list of c (2, 5, 8) values Tells you what type of object something is

class ( )

Example

names() str( )

Look at structure of data set, tells you number of observations and variables

str(data)

Dim ()

Gives you dimensions of data frame

Dim(calcium)

mean()

Calculates mean

min()

Gives you smallest of the number set

head ()

summary() sd()

Standard deviation

sd(data$fev,na.rm=TRUE)

Quantile () IQR()

Calculates quantile of your data set, put . 25 for first OR .75 for third Calculates IQR for data set

Quantile(data$calcium, .25, na.rm= TRUE) IQR(data$fev,na.rm=TRUE)

Median()

Gives you median of data

median(data$fev,na.rm=TRUE)

Cor(dataframe)

Calculates correlation coefficient

cor(bodyfat$percent.fat, bodyfat$neck.circum..cm)

lm(y ~ x)

Gives linear regression of two vectors

Resid()

Gives individual residual values for model

Resid(model)

Fitted()

Gives individual fitted values for model

Fitted(model)...