R How to Find the Refferencing Row Index Number (Example Code)

data(iris)                         # Loading and modifying iris data
set.seed(982734)
rownames(iris) <- sample(1:nrow(iris))
head(iris)
#     Sepal.Length Sepal.Width Petal.Length Petal.Width Species
# 83           5.1         3.5          1.4         0.2  setosa
# 82           4.9         3.0          1.4         0.2  setosa
# 101          4.7         3.2          1.3         0.2  setosa
# 57           4.6         3.1          1.5         0.2  setosa
# 10           5.0         3.6          1.4         0.2  setosa
# 132          5.4         3.9          1.7         0.4  setosa

data(iris) # Loading and modifying iris data set.seed(982734) rownames(iris) <- sample(1:nrow(iris)) head(iris) # Sepal.Length Sepal.Width Petal.Length Petal.Width Species # 83 5.1 3.5 1.4 0.2 setosa # 82 4.9 3.0 1.4 0.2 setosa # 101 4.7 3.2 1.3 0.2 setosa # 57 4.6 3.1 1.5 0.2 setosa # 10 5.0 3.6 1.4 0.2 setosa # 132 5.4 3.9 1.7 0.4 setosa

which(rownames(iris) == 57)        # which & rownames functions
# 4

which(rownames(iris) == 57) # which & rownames functions # 4