Formula interface in R programming: for statistical tests, models and plotting

#rprogramming #datavisualization #rprogrammingforbeginners #formula

Here I have explained the formula of formula interface very commonly used in R programming. Formula interface is used to specify variables and their role in statistical tests, statistical models and plotting applications.

base R and lattice plotting systems use formula interface extensively.
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# Script

head(iris)

df_trunc = iris[1:100,]

summary(df_trunc)

aov(Sepal.Length~Species,iris) #Anova

mod = lm(Sepal.Length~Species,iris) # Linear

summary(mod)

plot(Sepal.Length~Species,iris) #datavisualization

plot(Sepal.Length~Sepal.Width , iris) #datavisualization

library(lattice)

bwplot(~Sepal.Length|Species,iris) #datavisualization

0:00 introduction
0:24 formula - components
1:20 Dataset
2:01 Use for statistical tests
3:07 use for statistical model
3:58 use for plotting graphs
4:58 use for plotting in Lattice
5:14 appeal for subscription