readb — fortran file binary read
string or integer
integers (dimensions of the matrix x). Set m=-1 if you do not know the numbers of rows, so all the file is read
vector of positive integers. the selected records for direct access. This vector size must be equal to the number of rows of desired
binary read of the matrix
x in the file
Matrix entries are supposed to have been stored on 8 byte words.
For direct record access, file must have been previously opened using
file function to set the record_length.
file-name must be
the result of the