gpsprof: first cut at adding Altitude to gpsprof spaceplot.

It works but not finished visually.

1 files changed, 4 insertions, 1 deletions

diff --git a/gpsprof b/gpsprof
index f1d6b9e9..eb77acef 100755
--- a/gpsprof
+++ b/gpsprof
@@ -84,9 +84,12 @@ class spaceplot:
             fmt += 'set key below\n'
             fmt += 'set key title "%s"\n' % time.asctime()
             fmt += 'set size ratio -1\n'
+            fmt += 'set style line 2 pt 1\n'
             fmt += 'set style line 3 pt 2 # Looks good on X11\n'
             fmt += 'set xlabel "Meters east from %s"\n' % lonstring
             fmt += 'set ylabel "Meters north from %s"\n' % latstring
+            fmt += 'set y2label "Meters Altitude"\n'
+            fmt += 'set y2tics\n'
             fmt += 'cep=%f\n' % d((0,0), recentered[len(self.fixes)/2])
             fmt += 'set parametric\n'
             fmt += 'set trange [0:2*pi]\n'
@@ -95,7 +98,7 @@ class spaceplot:
             fmt += 'chlen = cep/20\n'
             fmt += "set arrow from -chlen,0 to chlen,0 nohead\n"
             fmt += "set arrow from 0,-chlen to 0,chlen nohead\n"
-            fmt += 'plot cx(t, cep),cy(t, cep) title "CEP (50%%) = %f meters", "%s" using 1:2 with points ls 3 title "%d GPS fixes"\n' % (cep_meters, file, len(self.fixes))
+            fmt += 'plot cx(t, cep),cy(t, cep) title "CEP (50%%) = %f meters", "%s" using 1:2 with points ls 3 title "%d GPS fixes" , "%s" using (0):($5 > -999 ? $5 : 1/0) axes x1y2 with points ls 2 title "Alt" \n' % (cep_meters, file, len(self.fixes), file)
             return fmt
 
 class uninstrumented: