Practical IDL Programming

O

object data type, 3

Object Graphics system, 3

object-oriented programming in IDL, 3

objref data type, 19

offset

computing automatically, 320–322

setting automatically for PS device, 362–368

setting manually for PS device, 360–362

on_error procedure, 130–131

on_ioerror procedure, 132, 154

online help, 9–11

accessing, 9

checking for function names, 23

Contents button, 9

doc_library procedure, 10–11

Index button, 10

manuals, 9–10

for specific topics, 10

See also help procedure

opening files, 148–149

openr procedure

defined, 147

f77_unformatted keyword, 160

format keyword, 152

opening files (read-only), 148–149

swap_if_big_endian keyword, 163

swap_if_little_endian keyword, 163

openu procedure

defined, 147

f77_unformatted ...