GenericMappingTools · PaulWessel · Jun 4, 2019 · Jun 4, 2019 · Jun 4, 2019 · Jun 4, 2019
diff --git a/doc/examples/anim02/anim_02.sh b/doc/examples/anim02/anim_02.sh
@@ -14,8 +14,10 @@ else	# Make animated GIF
 fi	
 # 1. Create files needed in the loop
 cat << EOF > pre.sh
+gmt begin
 	gmt math -T0/360/10 T 180 ADD = angles.txt
-	gmt makecpt -Crainbow -T500/4500 > main.cpt
+	gmt makecpt -Crainbow -T500/4500 -H > main.cpt
+gmt end
 EOF
 # 2. Set up the main frame script
 cat << EOF > main.sh

diff --git a/doc/examples/anim03/anim_03.sh b/doc/examples/anim03/anim_03.sh
@@ -14,9 +14,11 @@ else	# Make animated GIF, infinitely looping
 fi	
 # 1. Create files needed in the loop
 cat << EOF > pre.sh
+gmt begin
 	gmt math -T0/355/5 -o1 T = angles.txt
-	gmt makecpt -Crelief -T-2000/2000/20 > iceland.cpt
+	gmt makecpt -Crelief -T-2000/2000/20 -H > iceland.cpt
 	gmt grdclip -Sb0/-1 -Gabove.nc @Iceland.nc
+gmt end
 EOF
 # 2. Set up the main frame script
 cat << EOF > main.sh

diff --git a/doc/examples/anim04/anim_04.sh b/doc/examples/anim04/anim_04.sh
@@ -15,9 +15,11 @@ fi
 # 1. Create files needed in the loop
 cat << EOF > pre.sh
 # Set up flight path
-gmt project -C-73.8333/40.75 -E-80.133/25.75 -G10 -Q > flight_path.txt
-gmt grdgradient @USEast_Coast.nc -A90 -Nt1 -Gint_US.nc
-gmt makecpt -Cglobe > globe_US.cpt
+gmt begin
+	gmt project -C-73.8333/40.75 -E-80.133/25.75 -G10 -Q > flight_path.txt
+	gmt grdgradient @USEast_Coast.nc -A90 -Nt1 -Gint_US.nc
+	gmt makecpt -Cglobe -H > globe_US.cpt
+gmt end
 EOF
 # 2. Set up the main frame script
 cat << EOF > main.sh

diff --git a/doc/examples/anim05/anim_05.sh b/doc/examples/anim05/anim_05.sh
@@ -14,7 +14,9 @@ else	# Make animated GIF, infinitely looping
 fi	
 # 1. Create files needed in the loop
 cat << EOF > pre.sh
-	gmt makecpt -Cpolar -T-25/25 > t.cpt
+gmt begin
+	gmt makecpt -Cpolar -T-25/25 -H > t.cpt
+gmt end
 EOF
 # 2. Set up the main frame script
 cat << EOF > main.sh

diff --git a/doc/examples/anim07/anim_07.sh b/doc/examples/anim07/anim_07.sh
@@ -14,12 +14,14 @@ else	# Make movie in MP4 format and a thumbnail animated GIF using every 10th fr
 fi
 # 1. Create background plot and data files needed in the loop
 cat << EOF > pre.sh
-# Set view and sun longitudes
-gmt math -T0/360/5 -I T 5 SUB = longitudes.txt
-# Extract a topography CPT
-gmt makecpt -Cdem2 -T0/6000 > movie_dem.cpt
-# Get gradients of the relief from N45E
-gmt grdgradient @earth_relief_20m -Nt1.25 -A45 -Gintens.nc
+gmt begin
+	# Set view and sun longitudes
+	gmt math -T0/360/5 -I T 5 SUB = longitudes.txt
+	# Extract a topography CPT
+	gmt makecpt -Cdem2 -T0/6000 -H > t.cpt
+	# Get gradients of the relief from N45E
+	gmt grdgradient @earth_relief_20m -Nt1.25 -A45 -Gintens.nc
+gmt end
 EOF
 # 2. Set up main script
 cat << EOF > main.sh
@@ -33,7 +35,7 @@ gmt begin
 	# Clip to expose land areas only
 	gmt coast -Gc
 	# Overlay relief over land only using dem cpt
-	gmt grdimage @earth_relief_20m -Is.nc -Cmovie_dem.cpt
+	gmt grdimage @earth_relief_20m -Is.nc -Ct.cpt
 	# Undo clipping and overlay gridlines
 	gmt coast -Q -B30g30
 gmt end

diff --git a/doc/examples/anim08/anim_08.sh b/doc/examples/anim08/anim_08.sh
@@ -21,16 +21,18 @@ TIME="starttime=2018-01-01%2000:00:00&endtime=2018-12-31%2000:00:00"
 MAG="minmagnitude=5"
 ORDER="orderby=time-asc"
 URL="\${SITE}?\${TIME}&\${MAG}&\${ORDER}"
-gmt convert \$URL -i2,1,3,4+s50,0 -hi1 > q.txt
-gmt makecpt -Cred,green,blue -T0,70,300,10000 > q.cpt
-gmt math -T2018-01-01T/2018-12-31T/2 --TIME_UNIT=d TNORM 40 MUL 200 ADD = times.txt
+gmt begin
+	gmt convert \$URL -i2,1,3,4+s50,0 -hi1 > q.txt
+	gmt makecpt -Cred,green,blue -T0,70,300,10000 -H > movie_dem.cpt
+	gmt math -T2018-01-01T/2018-12-31T/2 --TIME_UNIT=d TNORM 40 MUL 200 ADD = times.txt
+gmt end
 EOF
 # 2. Set up main script
 cat << EOF > main.sh
 gmt begin
 	gmt coast -Rg -JG\${MOVIE_COL1}/5/6i -G128 -S32 -X0 -Y0 -A500
 	gmt plot @ridge.txt -W0.5p,darkyellow
-	gmt events q.txt -SE- -Cq.cpt --TIME_UNIT=d -T\${MOVIE_COL0} -Es+r2+d6 -Ms5+c0.5 -Mi1+c-0.6 -Mt+c0
+	gmt events q.txt -SE- -Cmovie_dem.cpt --TIME_UNIT=d -T\${MOVIE_COL0} -Es+r2+d6 -Ms5+c0.5 -Mi1+c-0.6 -Mt+c0
 gmt end
 EOF
 # 3. Run the movie

diff --git a/doc/rst/source/grd2cpt.rst b/doc/rst/source/grd2cpt.rst
@@ -17,9 +17,12 @@ Synopsis
 [ |-C|\ *cpt* ] [ |-D|\ [**i**] ]
 [ |-E|\ [*nlevels*] ]
 [ |-F|\ [**R**\ \|\ **r**\ \|\ **h**\ \|\ **c**\ ][**+c**\ ]]
-[ |-G|\ *zlo*\ /\ *zhi* ] [ |-I|\ [**c**][**z**] ]
+[ |-G|\ *zlo*\ /\ *zhi* ]
+[ |-H| ]
+[ |-I|\ [**c**][**z**] ]
 [ |-L|\ *minlimit/maxlimit* ]
-[ |-M| ] [ |-N| ]
+[ |-M| ]
+[ |-N| ]
 [ |-Q|\ [**i**\ \|\ **o**] ]
 [ |SYN_OPT-R| ]
 [ |-S|\ **h**\ \|\ **l**\ \|\ **m**\ \|\ **u** ]
@@ -35,7 +38,9 @@ Description
 -----------
 
 **grd2cpt** reads one or more grid files and writes a static color palette
-(CPT) file to standard output. The CPT is based on an existing dynamic
+(CPT) file. In classic mode we write the CMT to standard output, while under
+modern mode we simply save the CPT as the current session CPT (but see **-H**).
+The CPT is based on an existing dynamic
 master CPT of your choice, and the mapping from data value to
 colors is through the data's cumulative distribution function (CDF), so
 that the colors are histogram equalized. Thus if the grid(s) and the
@@ -129,6 +134,12 @@ Optional Arguments
     we leave that end of the CPT alone.  The truncation takes place
     before any resampling. See also :ref:`manipulating_CPTs`
 
+.. _-H:
+
+**-H**\
+    Modern mode only: Write the CPT to standard output as well [Default saves
+    the CPT as the session current CPT].
+
 .. _-I:
 
 **-I**\ [**c**][**z**]

diff --git a/doc/rst/source/makecpt.rst b/doc/rst/source/makecpt.rst
@@ -19,8 +19,11 @@ Synopsis
 [ |-E|\ [*nlevels*] ]
 [ |-F|\ [**R**\ \|\ **r**\ \|\ **h**\ \|\ **c**\ ][**+c**\ ]]
 [ |-G|\ *zlo*\ /\ *zhi* ]
-[ |-I|\ [**c**][**z**] ] [ |-M| ]
-[ |-N| ] [ |-Q| ]
+[ |-H| ]
+[ |-I|\ [**c**][**z**] ]
+[ |-M| ]
+[ |-N| ]
+[ |-Q| ]
 [ |-S|\ *mode* ]
 [ |-T|\ [*min*/*max*/*inc*\ [**+n**\ ]\|\ *file*\ \|\ *list*\ ] ]
 [ |-V|\ [*level*\ ] ]
@@ -37,7 +40,9 @@ Description
 -----------
 
 **makecpt** is a module that will help you make static color palette tables
-(CPTs). You define an equidistant set of contour intervals or pass
+(CPTs). In classic mode we write the CMT to standard output, while under
+modern mode we simply save the CPT as the current session CPT (but see **-H**).
+You define an equidistant set of contour intervals or pass
 your own z-table or list, and create a new CPT based on an existing master (dynamic)
 CPT. The resulting CPT can be reversed relative to the master
 cpt, and can be made continuous or discrete.  For color tables beyond the
@@ -126,6 +131,12 @@ Optional Arguments
     we leave that end of the CPT alone.  The truncation takes place
     before any resampling. See also :ref:`manipulating_CPTs`
 
+.. _-H:
+
+**-H**\
+    Modern mode only: Write the CPT to standard output as well [Default saves
+    the CPT as the session current CPT].
+
 .. _-I:
 
 **-I**\ [**c**][**z**]

diff --git a/doc/scripts/GMT_App_M_1a.sh b/doc/scripts/GMT_App_M_1a.sh
@@ -49,10 +49,10 @@ do
 	j=`expr $i + 1`
 	left=`sed -n ${j}p tt.lis`
 	right=`sed -n ${i}p tt.lis`
-	gmt makecpt -C$left > tt.left.cpt
-	gmt makecpt -C$left -T-1/1/0.25 > tt.left2.cpt
-	gmt makecpt -C$right > tt.right.cpt
-	gmt makecpt -C$right -T-1/1/0.25 > tt.right2.cpt
+	gmt makecpt -H -C$left > tt.left.cpt
+	gmt makecpt -H -C$left -T-1/1/0.25 > tt.left2.cpt
+	gmt makecpt -H -C$right > tt.right.cpt
+	gmt makecpt -H -C$right -T-1/1/0.25 > tt.right2.cpt
 	gmt colorbar -D1.55i/${y}i+w2.70i/0.125i+h+jTC -Ctt.left.cpt -B0 
 	gmt colorbar -D4.50i/${y}i+w2.70i/0.125i+h+jTC -Ctt.right.cpt -B0 
 	gmt colorbar -D1.55i/${y2}i+w2.70i/0.125i+h+jTC -Ctt.left2.cpt -Bf0.25

diff --git a/doc/scripts/GMT_App_M_1b.sh b/doc/scripts/GMT_App_M_1b.sh
@@ -48,10 +48,10 @@ do
 	j=`expr $i + 1`
 	left=`sed -n ${j}p tt.lis`
 	right=`sed -n ${i}p tt.lis`
-	gmt makecpt -C$left > tt.left.cpt
-	gmt makecpt -C$left -T-1/1/0.25 > tt.left2.cpt
-	gmt makecpt -C$right > tt.right.cpt
-	gmt makecpt -C$right -T-1/1/0.25 > tt.right2.cpt
+	gmt makecpt -H -C$left > tt.left.cpt
+	gmt makecpt -H -C$left -T-1/1/0.25 > tt.left2.cpt
+	gmt makecpt -H -C$right > tt.right.cpt
+	gmt makecpt -H -C$right -T-1/1/0.25 > tt.right2.cpt
 	gmt colorbar -D1.55i/${y}i+w2.70i/0.125i+h+jTC -Ctt.left.cpt -B0 
 	gmt colorbar -D4.50i/${y}i+w2.70i/0.125i+h+jTC -Ctt.right.cpt -B0
 	gmt colorbar -D1.55i/${y2}i+w2.70i/0.125i+h+jTC -Ctt.left2.cpt -Bf0.25 

diff --git a/doc/scripts/GMT_App_M_1c.sh b/doc/scripts/GMT_App_M_1c.sh
@@ -46,10 +46,10 @@ do
 	j=`expr $i + 1`
 	left=`sed -n ${j}p tt.lis`
 	right=`sed -n ${i}p tt.lis`
-	gmt makecpt -C$left > tt.left.cpt
-	gmt makecpt -C$left -T-1/1/0.25 > tt.left2.cpt
-	gmt makecpt -C$right > tt.right.cpt
-	gmt makecpt -C$right -T-1/1/0.25 > tt.right2.cpt
+	gmt makecpt -H -C$left > tt.left.cpt
+	gmt makecpt -H -C$left -T-1/1/0.25 > tt.left2.cpt
+	gmt makecpt -H -C$right > tt.right.cpt
+	gmt makecpt -H -C$right -T-1/1/0.25 > tt.right2.cpt
 	gmt colorbar -D1.55i/${y}i+w2.70i/0.125i+h+jTC -Ctt.left.cpt -B0 
 	gmt colorbar -D4.50i/${y}i+w2.70i/0.125i+h+jTC -Ctt.right.cpt -B0 
 	gmt colorbar -D1.55i/${y2}i+w2.70i/0.125i+h+jTC -Ctt.left2.cpt -Bf0.25 

diff --git a/doc/scripts/GMT_App_O_9.sh b/doc/scripts/GMT_App_O_9.sh
@@ -9,8 +9,8 @@ gmt set FORMAT_GEO_MAP ddd:mm:ssF FONT_ANNOT_PRIMARY +9p FONT_TITLE 22p
 gmt project -E-74/41 -C-17/28 -G10 -Q > great_NY_Canaries.txt
 gmt project -E-74/41 -C2.33/48.87 -G100 -Q > great_NY_Paris.txt
 km=`echo -17 28 | gmt mapproject -G-74/41+uk -fg --FORMAT_FLOAT_OUT=%.0f -o2`
-gmt makecpt -Clightred,lightyellow,lightgreen -T0,3,6,100 -N > ttt.cpt
-gmt grdimage @App_O_ttt.nc -Itopo5_int.nc -Cttt.cpt $R -JM5.3i -nc+t1 
+gmt makecpt -Clightred,lightyellow,lightgreen -T0,3,6,100 -N
+gmt grdimage @App_O_ttt.nc -Itopo5_int.nc -C $R -JM5.3i -nc+t1 
 gmt grdcontour @App_O_ttt.nc -C0.5 -A1+u" hour"+v+f8p,Bookman-Demi \
 	-GL80W/31N/17W/26N,17W/28N/17W/50N -S2
 gmt plot -Wfatter,white great_NY_Canaries.txt

diff --git a/doc/scripts/GMT_CPTscale.sh b/doc/scripts/GMT_CPTscale.sh
@@ -21,10 +21,10 @@ gmt plot -R0/6/0/6 -Jx1i -W0.25p << EOF
 5	0.785
 EOF
 gmt colorbar -Cglobe -Baf -Dx3i/1.5i+w2.8i/0.15i+jCM -W0.001 
-gmt makecpt -Cglobe -T-500/3000 > t.cpt
-gmt colorbar -Ct.cpt -Baf -Dx5i/1.5i+w2.0i/0.15i+jLM -W0.001 
-gmt makecpt -Cglobe -G-3000/5000 -T-500/3000 > t.cpt
-gmt colorbar -Ct.cpt -Baf -Dx1i/1.5i+w2.0i/0.15i+jRM+ma -W0.001 
+gmt makecpt -Cglobe -T-500/3000
+gmt colorbar -C -Baf -Dx5i/1.5i+w2.0i/0.15i+jLM -W0.001 
+gmt makecpt -Cglobe -G-3000/5000 -T-500/3000
+gmt colorbar -C -Baf -Dx1i/1.5i+w2.0i/0.15i+jRM+ma -W0.001 
 gmt text -N -F+f14p+j << EOF 
 0	0	LB	Scale a subset (via @%1%-G@%%)
 6	0	RB	Scale entire range

diff --git a/doc/scripts/GMT_color_interpolate.sh b/doc/scripts/GMT_color_interpolate.sh
@@ -3,14 +3,14 @@ gmt begin GMT_color_interpolate ps
 gmt basemap -Jx1i -R0/6.8/0/2.0 -B0 
 
 # Plot polar color map in the left; right (top) and wrong (bottom)
-gmt makecpt -Cpolar -T-1/1 > tmp.cpt
-gmt colorbar -D1.7/1.6+w3i/0.3i+h+jTC -Ctmp.cpt -B0.5f0.1 
-gmt colorbar -D1.7/0.7+w3i/0.3i+h+jTC -Ctmp.cpt -B0.5f0.1 --COLOR_MODEL=hsv 
+gmt makecpt -Cpolar -T-1/1
+gmt colorbar -D1.7/1.6+w3i/0.3i+h+jTC -C -B0.5f0.1 
+gmt colorbar -D1.7/0.7+w3i/0.3i+h+jTC -C -B0.5f0.1 --COLOR_MODEL=hsv 
 
 # Plot rainbow color map in the left; right (top) and wrong (bottom)
-gmt makecpt -Crainbow -T-1/1 > tmp.cpt
-gmt colorbar -D5.1/1.6+w3i/0.3i+h+jTC -Ctmp.cpt -B0.5f0.1 
-gmt colorbar -D5.1/0.7+w3i/0.3i+h+jTC -Ctmp.cpt -B0.5f0.1 --COLOR_MODEL=rgb 
+gmt makecpt -Crainbow -T-1/1
+gmt colorbar -D5.1/1.6+w3i/0.3i+h+jTC -C -B0.5f0.1 
+gmt colorbar -D5.1/0.7+w3i/0.3i+h+jTC -C -B0.5f0.1 --COLOR_MODEL=rgb 
 
 gmt plot -Sd0.1i -Wblack -Gwhite << END
 0.2 1.6

diff --git a/doc/scripts/GMT_colorbar.sh b/doc/scripts/GMT_colorbar.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 gmt begin GMT_colorbar ps
-gmt makecpt -T-15/15 -Cpolar > t.cpt
-gmt basemap -R0/20/0/1 -JM5i -BWse -Baf 
-gmt colorbar -Ct.cpt -Baf -Bx+u"\\232" -By+l@~D@~T -DJBC+e
+	gmt makecpt -T-15/15 -Cpolar
+	gmt basemap -R0/20/0/1 -JM5i -BWse -Baf 
+	gmt colorbar -C -Baf -Bx+u"\\232" -By+l@~D@~T -DJBC+e
 gmt end
diff --git a/doc/scripts/GMT_cyclic.sh b/doc/scripts/GMT_cyclic.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 gmt begin GMT_cyclic ps
-gmt makecpt -T0/100 -Cjet -Ww > t.cpt
-gmt basemap -R0/20/0/1 -JM5i -BWse -Baf
-gmt colorbar -Ct.cpt -Baf -DJBC 
+	gmt makecpt -T0/100 -Cjet -Ww
+	gmt basemap -R0/20/0/1 -JM5i -BWse -Baf
+	gmt colorbar -C -Baf -DJBC 
 gmt end
diff --git a/doc/scripts/GMT_hinge.sh b/doc/scripts/GMT_hinge.sh
@@ -1,10 +1,10 @@
 #!/usr/bin/env bash
 gmt begin GMT_hinge ps
-gmt makecpt -Cglobe -T-8000/3000 > t.cpt
-gmt colorbar -Ct.cpt  -Baf -Dx0/0+w4.5i/0.1i+h -W0.001 
-gmt colorbar -Cglobe  -Baf -Dx0/0+w4.5i/0.1i+h -W0.001 -Y0.5i 
-echo 2.25 0.1 90 0.2i | gmt plot -R0/4.5/0/1 -Jx1i -Sv0.1i+a80+b -W1p -Gblack 
-gmt text -F+f12p+jCB << EOF 
-2.25	0.35	HINGE
-EOF
+	gmt makecpt -Cglobe -T-8000/3000
+	gmt colorbar -C  -Baf -Dx0/0+w4.5i/0.1i+h -W0.001 
+	gmt colorbar -Cglobe  -Baf -Dx0/0+w4.5i/0.1i+h -W0.001 -Y0.5i 
+	echo 2.25 0.1 90 0.2i | gmt plot -R0/4.5/0/1 -Jx1i -Sv0.1i+a80+b -W1p -Gblack 
+	gmt text -F+f12p+jCB <<- EOF 
+	2.25	0.35	HINGE
+	EOF
 gmt end
diff --git a/doc/scripts/GMT_tut_14.sh b/doc/scripts/GMT_tut_14.sh
@@ -1,10 +1,10 @@
 #!/usr/bin/env bash
 gmt begin GMT_tut_14 ps
-gmt makecpt -Crainbow -T-20/60/10 > disc.cpt
-gmt makecpt -Crainbow -T-20/60 > cont.cpt
-gmt basemap -R0/6/0/9 -Jx1i -B0 -Xc 
-gmt colorbar -Dx1i/1i+w4i/0.5i+h -Cdisc.cpt -Ba -B+tdiscrete 
-gmt colorbar -Dx1i/3i+w4i/0.5i+h -Ccont.cpt -Ba -B+tcontinuous 
-gmt colorbar -Dx1i/5i+w4i/0.5i+h -Cdisc.cpt -Ba -B+tdiscrete -I0.5 
-gmt colorbar -Dx1i/7i+w4i/0.5i+h -Ccont.cpt -Ba -B+tcontinuous -I0.5 
+	gmt makecpt -H -Crainbow -T-20/60/10 > disc.cpt
+	gmt makecpt -H -Crainbow -T-20/60 > cont.cpt
+	gmt basemap -R0/6/0/9 -Jx1i -B0 -Xc 
+	gmt colorbar -Dx1i/1i+w4i/0.5i+h -Cdisc.cpt -Ba -B+tdiscrete 
+	gmt colorbar -Dx1i/3i+w4i/0.5i+h -Ccont.cpt -Ba -B+tcontinuous 
+	gmt colorbar -Dx1i/5i+w4i/0.5i+h -Cdisc.cpt -Ba -B+tdiscrete -I0.5 
+	gmt colorbar -Dx1i/7i+w4i/0.5i+h -Ccont.cpt -Ba -B+tcontinuous -I0.5 
 gmt end
diff --git a/doc/scripts/GMT_tut_15.sh b/doc/scripts/GMT_tut_15.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 gmt begin GMT_tut_15 ps
-gmt makecpt -Crainbow -T1000/5000 > topo.cpt
-gmt grdimage @tut_relief.nc -JM6i -Ba -BWSnE -Ctopo.cpt 
-gmt colorbar -DJTC -Rtut_relief.nc -Ctopo.cpt -I0.4 -Bxa -By+lm 
+	gmt makecpt -Crainbow -T1000/5000
+	gmt grdimage @tut_relief.nc -JM6i -Ba -BWSnE -C 
+	gmt colorbar -DJTC -Rtut_relief.nc -C -I0.4 -Bxa -By+lm 
 gmt end
diff --git a/doc/scripts/GMT_tut_16.sh b/doc/scripts/GMT_tut_16.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 gmt begin GMT_tut_16 ps
-gmt makecpt -Crainbow -T1000/5000 > topo.cpt
-gmt grdgradient @tut_relief.nc -Ne0.8 -A100 -fg -Gus_i.nc
-gmt grdimage tut_relief.nc -Ius_i.nc -JM6i -Ba -BWSnE -Ctopo.cpt 
-gmt colorbar -DJTC -Rtut_relief.nc -Ctopo.cpt -I0.4 -Bxa -By+lm 
+	gmt makecpt -Crainbow -T1000/5000
+	gmt grdgradient @tut_relief.nc -Ne0.8 -A100 -fg -Gus_i.nc
+	gmt grdimage tut_relief.nc -Ius_i.nc -JM6i -Ba -BWSnE -C
+	gmt colorbar -DJTC -Rtut_relief.nc -C -I0.4 -Bxa -By+lm 
 gmt end
diff --git a/doc/scripts/GMT_tut_19.sh b/doc/scripts/GMT_tut_19.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 gmt begin GMT_tut_19 ps
-  gmt makecpt -Ctopo -T1000/5000 > t.cpt
+  gmt makecpt -Ctopo -T1000/5000
   gmt grdgradient @tut_relief.nc -Ne0.8 -A100 -fg -Gus_i.nc
-  gmt grdview tut_relief.nc -JM4i -p135/35 -Qi50 -Ius_i.nc -Ct.cpt -Ba -JZ0.5i
+  gmt grdview tut_relief.nc -JM4i -p135/35 -Qi50 -Ius_i.nc -C -Ba -JZ0.5i
 gmt end
 
diff --git a/doc/scripts/GMT_tut_9.sh b/doc/scripts/GMT_tut_9.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 gmt begin GMT_tut_9 ps
-gmt makecpt -Cred,green,blue -T0,100,300,10000 > quakes.cpt
-gmt coast -R130/150/35/50 -JM6i -B5 -Ggray 
-gmt plot @tut_quakes.ngdc -Wfaint -i4,3,5,6+s0.1 -h3 -Scc -Cquakes.cpt
+	gmt makecpt -Cred,green,blue -T0,100,300,10000
+	gmt coast -R130/150/35/50 -JM6i -B5 -Ggray 
+	gmt plot @tut_quakes.ngdc -Wfaint -i4,3,5,6+s0.1 -h3 -Scc -C -Vl
 gmt end
diff --git a/src/gmt_support.c b/src/gmt_support.c
@@ -1338,7 +1338,7 @@ bool gmt_consider_current_cpt (struct GMTAPI_CTRL *API, bool *active, char **arg
 		gmt_M_str_free (*arg);
 		*arg = strdup (string);		/* Pass back the name of the current CPT with modifers */
 	}
-	else if ((*arg)[0] == '\0') {	/* Noting given */
+	else if (*arg == NULL) {	/* Noting given */
 		if ((cpt = gmt_get_current_cpt (API->GMT)) == NULL) return false;	/* No current CPT */
 		*arg = strdup (cpt);		/* Pass back the name of the current CPT */
 	}