From 5f62c6da5a8093f70b75e84122156a70059ea0ea Mon Sep 17 00:00:00 2001
From: Remko Scharroo <remko.scharroo@eumetsat.int>
Date: Sat, 4 Jan 2025 18:29:36 +0100
Subject: [PATCH] Fix GMT_App_M_1?.sh so it passes test (#8668)

---
 doc/scripts/GMT_App_M_1a.sh | 8 +++-----
 doc/scripts/GMT_App_M_1b.sh | 8 +++-----
 doc/scripts/GMT_App_M_1c.sh | 8 +++-----
 doc/scripts/GMT_App_M_1d.sh | 8 +++-----
 4 files changed, 12 insertions(+), 20 deletions(-)

diff --git a/doc/scripts/GMT_App_M_1a.sh b/doc/scripts/GMT_App_M_1a.sh
index 1234f112222..2bd5bd39b0d 100755
--- a/doc/scripts/GMT_App_M_1a.sh
+++ b/doc/scripts/GMT_App_M_1a.sh
@@ -46,13 +46,11 @@ y=0.375
 y2=0.25
 while [ $i -le $n ]
 do
-	j1=$(expr $n - $i)
-	j2=$(expr $n - $i + 1)
 	if [ $i -eq $n ]; then
-		plot $(sed -n ${j2}p tt.lis) 3.05
+		plot $(sed -n 1p tt.lis) 3.05
 	else
-		plot $(sed -n ${j1}p tt.lis) 1.55
-		plot $(sed -n ${j2}p tt.lis) 4.50
+		plot $(sed -n $(expr $n - $i    )p tt.lis) 1.55
+		plot $(sed -n $(expr $n - $i + 1)p tt.lis) 4.50
 	fi
 	i=$(expr $i + 2)
 	y=$(gmt math -Q $y $dy ADD =)
diff --git a/doc/scripts/GMT_App_M_1b.sh b/doc/scripts/GMT_App_M_1b.sh
index 20f2688cb3d..4f7752f9834 100755
--- a/doc/scripts/GMT_App_M_1b.sh
+++ b/doc/scripts/GMT_App_M_1b.sh
@@ -46,13 +46,11 @@ y=0.375
 y2=0.25
 while [ $i -le $n ]
 do
-	j1=$(expr $n - $i)
-	j2=$(expr $n - $i + 1)
 	if [ $i -eq $n ]; then
-		plot $(sed -n ${j2}p tt.lis) 3.05
+		plot $(sed -n 1p tt.lis) 3.05
 	else
-		plot $(sed -n ${j1}p tt.lis) 1.55
-		plot $(sed -n ${j2}p tt.lis) 4.50
+		plot $(sed -n $(expr $n - $i    )p tt.lis) 1.55
+		plot $(sed -n $(expr $n - $i + 1)p tt.lis) 4.50
 	fi
 	i=$(expr $i + 2)
 	y=$(gmt math -Q $y $dy ADD =)
diff --git a/doc/scripts/GMT_App_M_1c.sh b/doc/scripts/GMT_App_M_1c.sh
index cb3b2cd92ea..e808ff36e84 100755
--- a/doc/scripts/GMT_App_M_1c.sh
+++ b/doc/scripts/GMT_App_M_1c.sh
@@ -46,13 +46,11 @@ y=0.375
 y2=0.25
 while [ $i -le $n ]
 do
-	j1=$(expr $n - $i)
-	j2=$(expr $n - $i + 1)
 	if [ $i -eq $n ]; then
-		plot $(sed -n ${j2}p tt.lis) 3.05
+		plot $(sed -n 1p tt.lis) 3.05
 	else
-		plot $(sed -n ${j1}p tt.lis) 1.55
-		plot $(sed -n ${j2}p tt.lis) 4.50
+		plot $(sed -n $(expr $n - $i    )p tt.lis) 1.55
+		plot $(sed -n $(expr $n - $i + 1)p tt.lis) 4.50
 	fi
 	i=$(expr $i + 2)
 	y=$(gmt math -Q $y $dy ADD =)
diff --git a/doc/scripts/GMT_App_M_1d.sh b/doc/scripts/GMT_App_M_1d.sh
index 09835e3c6dc..7bb38219ea9 100755
--- a/doc/scripts/GMT_App_M_1d.sh
+++ b/doc/scripts/GMT_App_M_1d.sh
@@ -46,13 +46,11 @@ y=0.375
 y2=0.25
 while [ $i -le $n ]
 do
-	j1=$(expr $n - $i)
-	j2=$(expr $n - $i + 1)
 	if [ $i -eq $n ]; then
-		plot $(sed -n ${j2}p tt.lis) 3.05
+		plot $(sed -n 1p tt.lis) 3.05
 	else
-		plot $(sed -n ${j1}p tt.lis) 1.55
-		plot $(sed -n ${j2}p tt.lis) 4.50
+		plot $(sed -n $(expr $n - $i    )p tt.lis) 1.55
+		plot $(sed -n $(expr $n - $i + 1)p tt.lis) 4.50
 	fi
 	i=$(expr $i + 2)
 	y=$(gmt math -Q $y $dy ADD =)