added Maggraph docu

.gitattributes

@@ -196,6 +196,7 @@ doc/tex/mod/Inttime -text
 doc/tex/mod/Intyear -text
 doc/tex/mod/Invert -text
 doc/tex/mod/Invertlev -text
+doc/tex/mod/Maggraph -text
 doc/tex/mod/Magplot -text
 doc/tex/mod/Magvector -text
 doc/tex/mod/Maskbox -text

OPERATORS

@@ -546,6 +546,7 @@ Operator catalog:
    Magplot       grfill          Shaded grid boxes
    Magvector     vector          Vector arrows plot
    Magvector     stream          Streamlines plot
+   Maggraph      graph           Line graph plot
 -------------------------------------------------------------
    Climate indices
 -------------------------------------------------------------

doc/tex/Modules

@@ -139,6 +139,7 @@ Strgal        Miscellaneous
 Hurr          Miscellaneous
 Magplot       Magics
 Magvector     Magics
+Maggraph      Magics
 EcaCdd        Climate indices
 EcaCfd        Climate indices
 EcaCsu        Climate indices

doc/tex/mod/Maggraph

+@BeginModule
+@NewPage
+@Name      = Maggraph
+@Title     = Line graph plot
+@Section   = Magics
+@Arguments = ifiles ofile
+@Operators = graph
+
+@BeginDescription
+This operator generates line graph plots.
+The data for the plot is read from @file{ifiles}.
+The result is written to @file{ofile}. The default format is XXX, this can be changed with the device parameter.
+
+Here is a list of all common plot parameters:
+
+@BeginTable
+ @bold{Keyname}    & @bold{Type}    & @bold{Description}      
+ device      & STRING  & Output device (ps, eps, pdf, png, gif, gif_animation, jpeg, svg, kml)
+@EndTable
+@EndDescription
+@EndModule
+
+
+@BeginOperator_graph
+@Title     = Line graph plot
+@Parameter = params
+@EndOperator
+
+
+@BeginParameter
+@Item = params
+STRING   Comma separated list of plot parameters
+@EndParameter

src/operator_help.h

@@ -4882,6 +4882,32 @@ static const char *MagvectorHelp[] = {
     NULL
 };
 
+static const char *MaggraphHelp[] = {
+    "NAME",
+    "    graph - Line graph plot",
+    "",
+    "SYNOPSIS",
+    "    graph,params  ifiles ofile",
+    "",
+    "DESCRIPTION",
+    "    This operator generates line graph plots.",
+    "    The data for the plot is read from ifiles.",
+    "    The result is written to ofile. The default format is XXX, this can be changed with the device parameter.",
+    "    ",
+    "    Here is a list of all common plot parameters:",
+    "    ",
+    "     Keyname    & Type    & Description      ",
+    "     device      & STRING  & Output device (ps, eps, pdf, png, gif, gif_animation, jpeg, svg, kml)",
+    "     projection  & STRING  & Projection (cylindrical, polar_stereographic, robinson, mercator)",
+    "     style       & STRING  & Contour line style (solid, dash, dot, chain_dash, chain_dot)",
+    "     min         & FLOAT   & Minimum value",
+    "     max         & FLOAT   & Maximum value",
+    "",
+    "PARAMETER",
+    "    params  STRING   Comma separated list of plot parameters",
+    NULL
+};
+
 static const char *EcaCddHelp[] = {
     "NAME",
     "    eca_cdd - Consecutive dry days index per time period",