I upload .xlsx file into R and I wonder how to select certain columns and rows for data analysis, when data looks like this:
columnName1 columnName2 columnName3 columnName4
<NA> NA NA <NA>
text number number text
text number number text
and the output should look like this: (e.g. Select columnName2 and columnName3) with command print data you should see this:
number number
number number