Missing values By default missing values are output as NA, but this may be changed by argument na.
We have too often been reduced to looking at the file with the command-line utility od or a hex editor to work out its encoding. The total number of non-missing i. Header line R prefers the header line to have no entry for the row names, so the file looks like dist climb time Greenmantle 2.
The example also illustrates the conversion of a nlon by nlat rows by 1 column variable in a data frame into a 2-d nlon by nlat array. Function write. In the example CRU data set considered here, the variables would consist of longitude, latitude and 12 columns of long-term means for each month, with the full data set thus consisting of rows by and 14 columns.
The individual approaches below can be timed using the proc. The most common task is to write a matrix or data frame to file as a rectangular grid of numbers, possibly with row and column labels.