Syntax: imgplot (FITS file)
  [row=n] [col=n] [rows=m,n] [cols=m,n] [-hist] [-sum]
  [-mdn] [-rms] [ps=] [xs=v] [xe=v] [ys=v] [ye=v]
 Plot part of image. OPTIONS:
  xs=v  : define minimum x on plot.
  xe=v  : define maximum x on plot.
  ys=v  : define minimum y on plot.
  ye=v  : define maximum y on plot.
  row=n : plot row n.
  col=n : plot column n.
  rows=m,n : plot an average, sum, or median of rows m to n.
  cols=m,n : plot an average, sum, or median of columns m to n.
  -hist : do a histogram plot.
  -sum  : plot a sum when using rows= or cols= .
  -mdn  : plot a median when using rows= or cols= . 
  -rms  : plot a rms when using rows= or cols= . 
  ps=   : produce a PostScript plot file.