cat << EOT > _inp_a.txt
0.01 -6
0.1  -4
  1   0
 20   8
 50   4
100   3
EOT
cat << EOT > _inp_b.txt
0.01  3
0.1   4
  1   5
  7   2
 50  -4
100  -8
EOT
range=0.01/100/-10/10
scale=5l/3
xga=a1g3
yga=g2a4
xlabel='x-label'
ylabel='y-label'
fig=fig_gra_slog.eps
gmt set FONT_ANNOT_PRIMARY 12
gmt set FONT_LABEL 8
gmt set MAP_TICK_LENGTH_PRIMARY 0c
gmt psbasemap -R$range -JX$scale -Bx$xga+l"$xlabel" -By$yga+l"$ylabel" -BWSen -P -K > $fig
gmt psxy _inp_a.txt -R -J -W1.5 -K -O >> $fig
gmt psxy _inp_a.txt -R -J -SC0.2 -G#000000 -N -K -O >> $fig
gmt psxy _inp_b.txt -R -J -W1.5,3_3:0 -K -O >> $fig
gmt psxy _inp_b.txt -R -J -SC0.2 -W1,#0000ff -G#ffffff -N -K -O >> $fig
echo '0.01 -10' | gmt psxy -R -J -Sp -O >> $fig



cat << EOT > _inp_a.txt
 2.5  1
 7.5  5
12.5  8
17.5  3
EOT
cat << EOT > _inp_b.txt
-75  40
-25  20
 25 -30
 70  30
EOT
rangeSW=0/20/0/10
rangeNE=-100/100/-50/50
scale=5/3
afgS=a5f1g5
afgW=a2f1g2
afgN=a50f10
afgE=a20f10
labelS='Label-S'
labelW='Label-W'
labelN='Label-N'
labelE='Label-E'
fig=fig_gra_2axes.eps
gmt set FONT_ANNOT_PRIMARY 8
gmt set FONT_LABEL 12
gmt set MAP_TICK_LENGTH_PRIMARY 0.2c
gmt psbasemap -R$rangeSW -JX$scale -Bx$afgS+l"$labelS" -By$afgW+l"$labelW" -BWS -P -K > $fig
gmt psxy _inp_a.txt -R -J -W2 -K -O >> $fig
gmt pstext -R -J -F+f+a+j -N -K -O << EOT >> $fig
17.5 3 10p 0 LM SW
EOT
gmt psbasemap -R$rangeNE -JX$scale -Bx$afgN+l"$labelN" -By$afgE+l"$labelE" -BNE -K -O >> $fig
gmt psxy _inp_b.txt -R -J -W2,5_5:0 -K -O >> $fig
gmt pstext -R -J -F+f+a+j -N -K -O << EOT >> $fig
70 30 10p 0 LM NE
EOT
echo '-100 -50' | gmt psxy -R -J -Sp -O >> $fig