Read numerical data from formatted text files.

read v.dat (25 numbers in "E" notation)
read xy.dat (30 lines, each with an x and a y value)
read m.dat (45 numbers, 5 per line)

 read v.dat v
 read xy.dat x y
 read\matrix m.dat m 5 9

  Solve a matrix equation
  Fit a function