search for: data2_30min

Dear r-users,   Originally my data is in notepad.  I use data.frame(...) to convert the data into columns but it has no header.  The data below is what I got in R.  I would like to extract these data:   19710629        39.3  19701126  19720629        33.8  19720517 ... when I use data2_30min[1, cbind(1,3,5)] command the result is NULL.   Then I tried data2_30min[1], it gives me the whole set of data.  I suspect the data is stored in a cell.   My question is, how do I split the data from dataframe into some columns which separating the data by spaces.  Many examples given on how to spli...