gtsel u.out y=30 z=12 out:tmp.out

gtstspct tmp.out out:tmp.out

gtext tmp.out ystr=1 yend=50 xstr=35 xend=95 out:u-z12-y30-kuo.spct 

gtcont u-z12-y30-kuo.spct tone=,0.0001,0.001,0.01,0.1,1,10 pat=25999,35999,45999,55999,70999,75999,85999