Find intrinsic values of rows from row names?

Question

I'm beginner in R and would like some help please.

I would like to find the value of row with the name of this row.

Imagine, if my data frame have 5 columns and 5 rows. The columns names are : "345", 456", "4567", "3456", "349" The row names are : "98","897","987","568","927"

How can I do for finding the column with the name "345" in a data frame/matrix and how I can I do for finding the row with the name "98" in a data frame/matrix ?

For exemple : the number of the column with the name "456" is 2 and the number of the row with the name "987" is 3.

Thanks you in advance !

The rownames must be unique. You cannot assign the same name "987" to two different rows . — RHertel, Jun 15 '16 at 10:52
Hello Roland, Thanks you but it doesn't help me or maybe I don't understand. I don't want the element in the box, I want the number of the row/column where is the element. — Sofiane M'barki, Jun 15 '16 at 10:53
Yes Rhertel, my exemple is corrected. My rownames are unique in my question, sorry. — Sofiane M'barki, Jun 15 '16 at 10:55

score 1 · Accepted Answer · answered Jun 15 '16 at 11:02

1

You can use which():

which(rownames(df1)=="987")
#[1] 3
which(colnames(df1)=="456")
#[1] 2

data

set.seed(123)
df1 <- data.frame(matrix(sample(100), 5, 5))
colnames(df1) <- c("345", "456", "4567", "3456", "349" )
rownames(df1) <- c("98","897","987","568","927")

answered Jun 15 '16 at 11:02

RHertel

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Thanks you so much Rhertel ! – Sofiane M'barki Jun 15 '16 at 11:06

Find intrinsic values of rows from row names?

1 Answers1