pscoast -R125/148/30/46 -JM15c -B5g5 -Di -W5 -S235 -X6c -Y4c -K > test.ps awk '{if($3<18.0){print $2,$1}}' sample4.txt | psxy -R -JM -Sc0.30 -W1 -G80/0/200 -O -K >> test.ps awk '{if($3>=18.0&&$3<20.0){print $2,$1}}' sample4.txt | psxy -R -JM -Sc0.30 -W1 -G80/120/240 -O -K >> test.ps awk '{if($3>=20.0&&$3<22.0){print $2,$1}}' sample4.txt | psxy -R -JM -Sc0.30 -W1 -G120/180/240 -O -K >> test.ps awk '{if($3>=22.0&&$3<24.0){print $2,$1}}' sample4.txt | psxy -R -JM -Sc0.30 -W1 -G200/200/200 -O -K >> test.ps awk '{if($3>=24.0&&$3<26.0){print $2,$1}}' sample4.txt | psxy -R -JM -Sc0.30 -W1 -G240/180/120 -O -K >> test.ps awk '{if($3>=26.0&&$3<28.0){print $2,$1}}' sample4.txt | psxy -R -JM -Sc0.30 -W1 -G240/120/80 -O -K >> test.ps awk '{if($3>=28.0){print $2,$1}}' sample4.txt | psxy -R -JM -Sc0.30 -W1 -G200/0/80 -O >> test.ps