;  This is a VERY simple IDL program
;  the semi-colons designate comments -- everything after a semi is ignored
;
;  To start the program, tell IDL the names of the data files to be read
;  The numbers 1,2,3,4 are equivalenced to the filenames
;
openr,1,'u1.dat'
openr,2,'u2.dat'
openr,3,'u3.dat'
openr,4,'he.dat'
;
;  Now define the variables -- how many data values will be read in
;  There will be 2 rows, each with 2560 elements
;
u1=fltarr(2,2560)
u2=fltarr(2,2560)
u3=fltarr(2,2560)
he=fltarr(2,2560)

;  Now this does the reading

readf,1,u1
readf,2,u2
readf,3,u3
readf,4,he

;  And now you're done, so close the files

close,1
close,2
close,3
close,4

end