10.9 The eps command
Vector graphic images in eps format may be placed on multiplot canvases using the eps command, which has a syntax analogous to the image command. However neither height nor width need be specified; in this case the image will be included at its native size. For example:
eps 'filename' at 3,2 rotate 5
will place the eps file with its bottom-left corner at position cm from the origin, rotated counter-clockwise through 5 degrees.