How to select some rows with specific rownames from a dataframe

Question

I have a data frame with several rows  I want to select some rows with specific rownames  such as stu2 stu3 stu5 stu9  from this dataframe  The input example dataframe is as follows           attr1 attr2 attr3 attr4   stu1      0     0     1     0   stu2     -1     1    -1     1   stu3      1    -1     0    -1   stu4      1    -1     1    -1   stu5     -1     1     0     1   stu6      1    -1     1     0   stu7     -1    -1    -1     1   stu8      1    -1     0    -1   stu9     -1    -1     1    -1   stu10    -1     1     0     1   Expected output           attr1 attr2 attr3 attr4   stu2     -1     1    -1     1   stu3      1    -1     0    -1   stu5     -1     1     0     1   stu9     -1    -1     1    -1

User · Answer

df  lt - data frame x rnorm 10   y rnorm 10   rownames df   lt -  letters 1 10  df c  a   b

User · Answer

You can also use this   DF paste0  stu  c 2 3 5 9

User · Answer

Assuming that you have a data frame called students  you can select individual rows or columns using the bracket syntax  like this    students 1 2  would select row 1 and column 2  the result here would be a single cell  students 1   would select all of row 1  students  2  would select all of column 2    If you d like to select multiple rows or columns  use a list of values  like this    students c 1 3 4    would select rows 1  3 and 4   students c  stu1    stu2     would select rows named stu1 and stu2    Hope I could help

[r] How to select some rows with specific rownames from a dataframe?

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