"Junk" label in legend when plotting over png image

[Aidan Delaney]

Hey all,

Plotting
x=[0:100] 
foo = pngread("foo.png")
image(foo)
plot(sin(x))
legend("sine", -1)

Gives the legend
"-" binary array 128x128 scan=yx etc....
                        sine -----------

where etc.... means some "junk" about the binary image that was just
plotted.  Is there any way of getting rid of the "junk" from the legend?
I've tried
legend(" ", "sine",-1)
in order to give the "junk" the label " " (space character).  But this
does not work.

--
Aidan Delaney