docu update

ChangeLog

@@ -12,6 +12,7 @@
 	* remapeta: add missing value support
 	* setpartab: add parameter LTYPE [request: Stefan Petri]
 	* Settime: change TIME_CONSTANT to TIME_VARIABLE if ntstep = 0
+	* yseasmean: bug fix for datasets with missing values [report: Hans-Jrgen Panitz]
 	* ntime: bug fix for datasets with time constant parameters only [report: David Wang]
 	  (also affected: ndate, nmon, nyear, showdate, showtime, showmon, showyear)
 	* Version 1.2.0 released

doc/tex/cdo_int.tex

 \chapter{Introduction}
 
-The Climate Data Operators ({\CDO}) software is a collection of many operators
+The Climate Data Operators ({\CDO}) software are a collection of many operators
 for standard processing of climate and forecast model output.
 The operators include simple statistical and arithmetic functions, data selection
 and subsampling tools, and spatial interpolation.
@@ -16,8 +16,8 @@ independent access to GRIB and netCDF datasets.
 The local data formats SERVICE, EXTRA and IEG are also supported.
 
 There are some limitations for GRIB and netCDF datasets.
-A GRIB dataset must be consistent, similar to netCDF.
-That means all time steps must have the same variables, and
+A GRIB dataset has to be consistent, similar to netCDF.
+That means all time steps need to have the same variables, and
 within a time step each variable may occur only once.
 NetCDF datasets are supported only with 2-dimensional, 3-dimensional and 4-dimensional
 variables and the attributes should follow the

doc/tex/cdo_ref.tex

@@ -2,7 +2,7 @@
 %\chapter{\label{refman}Reference manual for all operators}
 
 This section gives a description of all operators.
-Similar operators are grouped to modules.
+Related operators are grouped to modules.
 For easier description all single input files are named {\tt ifile} or {\tt ifile1}, {\tt ifile2}, etc.,
 and an unlimited number of input files are named {\tt ifiles}.
 All output files are named {\tt ofile} or {\tt ofile1}, {\tt ofile2}, etc.

doc/tex/cdoprog.tex

@@ -35,7 +35,7 @@
 \noindent
 \begin{tabular*}{3.95in}{|l|l|} \hline
 \makebox[0.85in][l]{{\bf{-a}}                  } & \makebox[2.76in][l]{Convert from a relative to an absolute time axis} \\ \hline
-\makebox[0.85in][l]{{\bf{-b}} $<\!nbits\!>$    } & \makebox[2.76in][l]{Set the number of bits for the output precision} \\
+\makebox[0.85in][l]{{\bf{-b}} $<\!nbits\!>$    } & \makebox[2.76in][l]{Set the number of bits for output precision} \\
                                                  & (32/64 for nc,nc2,nc4,srv,ext,ieg; 1 - 32 for grb) \\ \hline
 \makebox[0.85in][l]{{\bf{-f}} $<\!format\!>$   } & \makebox[2.76in][l]{Output file format (grb,nc,nc2,nc4,srv,ext,ieg)} \\ \hline
 \makebox[0.85in][l]{{\bf{-g}} $<\!grid\!>$     } & \makebox[2.76in][l]{Grid name or file} \\

doc/tex/grid.tex

@@ -21,13 +21,13 @@ The following pre-defined grid names are available:
     {\tt r<NX>x<NY>} defines a global regular grid.
     The number of the longitudes {\tt <NX>} and the latitudes {\tt <NY>}
     can be selected at will.
-    The longitudes starts at 0$^\circ$ with an increment of (360/{\tt <NX>})$^\circ$.
+    The longitudes start at 0$^\circ$ with an increment of (360/{\tt <NX>})$^\circ$.
     The latitudes go from south to north with an increment of (180/{\tt <NY>})$^\circ$.
 
 \subsection*{Global gaussian grid: {\tt t<RES>grid}}
     {\tt t<RES>grid} defines a global gaussian grid.
     Each valid triangular resolution can be used for {\tt <RES>}.
-    The longitudes starts at 0$^\circ$ with an increment of (360/nlon)$^\circ$.
+    The longitudes start at 0$^\circ$ with an increment of (360/nlon)$^\circ$.
     The gaussian latitudes go from north to south.
 
 %\subsection*{Spherical harmonics: t$<$RES$>$spec}
@@ -51,10 +51,10 @@ the first variable will be used.
 \subsection{SCRIP grids}
 
 SCRIP is a Spherical Coordinate Remapping and Interpolation Package.
-It is using a common grid description in netCDF.
+It uses a common grid description in netCDF.
 You can use it to describe curvilinear grids or unstructured grid cells.
 For more information about this format see \cite{SCRIP}.
-This grid description format is only available if the program was compiled
+That grid description format is only available if the program was compiled
 with netCDF support.
 
 \vspace{2mm}
@@ -121,7 +121,7 @@ PINGO grid description example of a T21 gaussian grid:
 
 \subsection{CDO grids}
 
-All supported grids can be also described with the {\CDO} description ASCII formatted file.
+All supported grids can also be described with the {\CDO} grid description.
 %The {\CDO} grid description is an ASCII formatted file.
 %It is a common grid description for all available grids.
 The following keywords can be used to describe a grid:
@@ -153,8 +153,8 @@ Keyword           & Datatype     & Description \\ \hline
 \vspace{4mm}
 
 Which keywords are necessary depends on the gridtype.
-The following table gives an overview of the default values or the size for the different
-grid types.
+The following table gives an overview of the default values or the size
+with respect to the different grid types.
 
 %\vspace{2mm}
 %\begin{tabular}[b]{|c|c|c|c|c|c|c|c|c|}
@@ -216,7 +216,7 @@ ybounds    & 2*ysize & 2*ysize & 4*gridsize & nv*gridsize \\
 
 \vspace{3mm}
 
-The keywords nvertex, xbounds and ybounds are optional if the area weights are not needed.
+The keywords nvertex, xbounds and ybounds are optional if area weights are not needed.
 
 \vspace{2mm}
 

doc/tex/install.tex

 \section{Building from sources}
 
 This section describes how to build {\CDO} from the sources on a UNIX system.
-{\CDO} uses the GNU configure and build system to compile the source code.
+{\CDO} uses the GNU configure and build system for compilation.
 The only requirement is a working ANSI C compiler.
 
 %First go to the \href{http://www.mpimet.mpg.de/cdo/download.html}{\tt download} page
 %({\tt http://www.mpimet.mpg.de/\\,cdo/download.html}) to get the latest distribution,
 First go to the \href{http://www.mpimet.mpg.de/cdo}{\tt download} page
 ({\tt http://www.mpimet.mpg.de/cdo}) to get the latest distribution,
-if you do not already have it.
+if you do not have it yet.
 
 To take full advantage of {\CDO} features the following additional
 library should be installed.
@@ -30,10 +30,10 @@ library should be installed.
 
 \subsection{Compilation}
 
-Compilation is now done by performing the following steps:
+Compilation is done by performing the following steps:
 
 \begin{enumerate}
-\item Unpack the archive, if you haven't already done that:
+\item Unpack the archive, if you haven't done that yet:
    
 \begin{verbatim}
     gunzip cdo-$VERSION.tar.gz    # uncompress the archive

doc/tex/mod/Arith

@@ -9,7 +9,9 @@
 
 @BeginDescription
 This module performs simple arithmetic of two datasets.
-The header and date information in @file{ofile} is the same as in @file{ifile1}.
+The number of fields in @file{ifile1} should be the same as in @file{ifile2}.
+One of the input files can contain only one time step or one field.
+The fields in @file{ofile} inherit the meta data from @file{ifile1} or @file{ifile2}.
 @EndDescription
 @EndModule
 

doc/tex/mod/Arithc

@@ -9,7 +9,7 @@
 
 @BeginDescription
 This module performs simple arithmetic with all field elements of a dataset and 
-a constant. The header and date information in @file{ofile} is the same as in @file{ifile}.
+a constant. The fields in @file{ofile} inherit the meta data from @file{ifile}.
 @EndDescription
 @EndModule
 

doc/tex/mod/Change

@@ -60,7 +60,7 @@ Changes one level of a user given code number.
 @Parameter = name oldlev newlev
 
 @BeginDescription
-Changes one level of a user given variable.
+Changes one level of a user given variable name.
 @EndDescription
 @EndOperator
 

doc/tex/mod/Comp

@@ -9,9 +9,11 @@
 
 @BeginDescription
 This module compares two datasets field by field. The resulting
-field is a mask with 1 if the comparison is true and 0 if the
-comparison is false. The type of the comparison depends on the
-actual operator.
+field is a mask containing 1 if the comparison is true and 0 if not. 
+The number of fields in @file{ifile1} should be the same as in @file{ifile2}.
+One of the input files can contain only one time step or one field.
+The fields in @file{ofile} inherit the meta data from @file{ifile1} or @file{ifile2}.
+The type of comparison depends on the actual operator.
 @EndDescription
 @EndModule
 
@@ -155,8 +157,8 @@ o(t,x) = \left\{
 
 
 @BeginExample
-To create a mask with 1 if the elements of two fields are the same and 
-0 if the elements are different, use:
+To create a mask containing 1 if the elements of two fields are the same and 
+0 if the elements are different use:
 @BeginVerbatim
    cdo eq ifile1 ifile2 ofile
 @EndVerbatim

doc/tex/mod/Compc

@@ -8,9 +8,9 @@
 @Operators = eqc nec lec ltc gec gtc
 
 @BeginDescription
-This module compares all fields of dataset with a constant. The resulting
-field is a mask with 1 if the comparison is true and 0 if the comparison 
-is false. The type of the comparison depends on the actual operator.
+This module compares all fields of a dataset with a constant. The resulting
+field is a mask containing 1 if the comparison is true and 0 if not.
+The type of comparison depends on the actual operator.
 @EndDescription
 @EndModule
 
@@ -88,7 +88,7 @@ o(t,x) = \left\{
 
 
 @BeginOperator_ltc
-@Title     = Less then constant
+@Title     = Less than constant
 @Parameter = c
 
 @BeginDescription
@@ -136,7 +136,7 @@ o(t,x) = \left\{
 
 
 @BeginOperator_gtc
-@Title     = Greater then constant
+@Title     = Greater than constant
 @Parameter = c
 
 @BeginDescription
@@ -166,7 +166,7 @@ FLOAT  Constant
 
 
 @BeginExample
-To create a mask with 1 if the field element is greater than 273.15 and 0 if not, use:
+To create a mask containing 1 if the field element is greater than 273.15 and 0 if not use:
 @BeginVerbatim
    cdo gtc,273.15 ifile ofile
 @EndVerbatim

doc/tex/mod/Cond

@@ -7,9 +7,12 @@
 @Operators = ifthen ifnotthen
 
 @BeginDescription
-This module conditional selects field elements from @file{ifile2} and writes them 
+This module selects field elements from @file{ifile2} with respect to @file{ifile1} and writes them 
 to @file{ofile}. The fields in @file{ifile1} are handled as a mask. A value 
 not equal to zero is treated as "true", zero is treated as "false".
+The number of fields in @file{ifile1} has either to be the same as in @file{ifile2} or the
+same as in one time step of @file{ifile2} or only one.
+The fields in @file{ofile} inherit the meta data from @file{ifile2}.
 @EndDescription
 @EndModule
 
@@ -19,16 +22,16 @@ not equal to zero is treated as "true", zero is treated as "false".
 
 @BeginDescription
 @IfMan
-         / i_2(t,x) if i_1(t,x) NE 0  AND  i_1(t,x) NE miss
+         / i_2(t,x) if i_1([t,]x) NE 0  AND  i_1([t,]x) NE miss
 o(t,x) =
-         \ miss     if i_1(t,x) EQ 0  OR   i_1(t,x) EQ miss
+         \ miss     if i_1([t,]x) EQ 0  OR   i_1([t,]x) EQ miss
 @EndifMan
 @IfDoc
 @BeginMath
 o(t,x) = \left\{
 \begin{array}{cll}
-   i_2(t,x) & \mbox{if} \;\;  i_1(t,x) \neq 0 & \wedge \;\; i_1(t,x) \neq \mbox{miss} \\
-\mbox{miss} & \mbox{if} \;\;  i_1(t,x)    = 0 & \vee   \;\; i_1(t,x)    = \mbox{miss} \\
+   i_2(t,x) & \mbox{if} \;\;  i_1([t,]x) \neq 0 & \wedge \;\; i_1([t,]x) \neq \mbox{miss} \\
+\mbox{miss} & \mbox{if} \;\;  i_1([t,]x)    = 0 & \vee   \;\; i_1([t,]x)    = \mbox{miss} \\
 \end{array}   \right.
 @EndMath
 @EndifDoc
@@ -41,16 +44,16 @@ o(t,x) = \left\{
 
 @BeginDescription
 @IfMan
-         / i_2(t,x) if i_1(t,x) EQ 0  AND  i_1(t,x) NE miss
+         / i_2(t,x) if i_1([t,]x) EQ 0  AND  i_1([t,]x) NE miss
 o(t,x) = 
-         \ miss     if i_1(t,x) NE 0  OR   i_1(t,x) EQ miss
+         \ miss     if i_1([t,]x) NE 0  OR   i_1([t,]x) EQ miss
 @EndifMan
 @IfDoc
 @BeginMath
 o(t,x) = \left\{
 \begin{array}{cll}
-   i_2(t,x) & \mbox{if} \;\;  i_1(t,x)    = 0 & \wedge \;\; i_1(t,x) \neq \mbox{miss} \\
-\mbox{miss} & \mbox{if} \;\;  i_1(t,x) \neq 0 & \vee   \;\; i_1(t,x)    = \mbox{miss} \\
+   i_2(t,x) & \mbox{if} \;\;  i_1([t,]x)    = 0 & \wedge \;\; i_1([t,]x) \neq \mbox{miss} \\
+\mbox{miss} & \mbox{if} \;\;  i_1([t,]x) \neq 0 & \vee   \;\; i_1([t,]x)    = \mbox{miss} \\
 \end{array}   \right.
 @EndMath
 @EndifDoc
@@ -60,7 +63,7 @@ o(t,x) = \left\{
 
 @BeginExample
 To select all field elements of @file{ifile2} if the corresponding field
-element of @file{ifile1} is greater than 0, use:
+element of @file{ifile1} is greater than 0 use:
 @BeginVerbatim
    cdo ifthen ifile1 ifile2 ofile
 @EndVerbatim

doc/tex/mod/Cond2

@@ -6,9 +6,13 @@
 @Operators = ifthenelse
 
 @BeginDescription
-This operator conditional selects field elements from @file{ifile2} or @file{ifile3} and 
-writes them to @file{ofile}. The fields in @file{ifile1} are handled as a mask.
+This operator selects field elements from @file{ifile2} or @file{ifile3} with respect to
+@file{ifile1} and writes them to @file{ofile}. The fields in @file{ifile1} are handled as a mask.
 A value not equal to zero is treated as "true", zero is treated as "false".
+The number of fields in @file{ifile1} has either to be the same as in @file{ifile2} or the 
+same as in one time step of @file{ifile2} or only one.
+@file{ifile2} and @file{ifile3} need to have the same number of fields.
+The fields in @file{ofile} inherit the meta data from @file{ifile2}.
 @EndDescription
 @EndModule
 
@@ -18,17 +22,19 @@ A value not equal to zero is treated as "true", zero is treated as "false".
 
 @BeginDescription
 @IfMan
-          / i_2(t,x) if i_1(t,x) NE 0  AND  i_1(t,x) NE miss
-o(t,x) = <  i_3(t,x) if i_1(t,x) EQ 0  AND  i_1(t,x) NE miss
-          \ miss     if i_1(t,x) EQ miss
+
+          / i_2(t,x) if i_1([t,]x) NE 0  AND  i_1([t,]x) NE miss
+o(t,x) = <  i_3(t,x) if i_1([t,]x) EQ 0  AND  i_1([t,]x) NE miss
+          \ miss     if i_1([t,]x) EQ miss
 @EndifMan
 @IfDoc
+\vspace*{4mm}
 @BeginMath
 o(t,x) = \left\{
 \begin{array}{cll}
-   i_2(t,x) & \mbox{if} \;\;  i_1(t,x) \neq 0 & \wedge \;\; i_1(t,x) \neq \mbox{miss} \\
-   i_3(t,x) & \mbox{if} \;\;  i_1(t,x)    = 0 & \wedge \;\; i_1(t,x) \neq \mbox{miss} \\
-\mbox{miss} & \mbox{if} \;\;  i_1(t,x)    = \mbox{miss} \\
+   i_2(t,x) & \mbox{if} \;\;  i_1([t,]x) \neq 0 & \wedge \;\; i_1([t,]x) \neq \mbox{miss} \\
+   i_3(t,x) & \mbox{if} \;\;  i_1([t,]x)    = 0 & \wedge \;\; i_1([t,]x) \neq \mbox{miss} \\
+\mbox{miss} & \mbox{if} \;\;  i_1([t,]x)    = \mbox{miss} \\
 \end{array}   \right.
 @EndMath
 @EndifDoc
@@ -38,7 +44,7 @@ o(t,x) = \left\{
 
 @BeginExample
 To select all field elements of @file{ifile2} if the corresponding field
-element of @file{ifile1} is greater than 0 and from @file{ifile3} otherwise, use:
+element of @file{ifile1} is greater than 0 and from @file{ifile3} otherwise use:
 @BeginVerbatim
    cdo ifthenelse ifile1 ifile2 ifile3 ofile
 @EndVerbatim

doc/tex/mod/Condc

@@ -8,7 +8,7 @@
 
 @BeginDescription
 This module creates fields with a constant value or missing value.
-The fields in @file{ifile1} are handled as a mask. A value not equal 
+The fields in @file{ifile} are handled as a mask. A value not equal 
 to zero is treated as "true", zero is treated as "false".
 @EndDescription
 @EndModule
@@ -68,7 +68,7 @@ FLOAT  Constant
 
 @BeginExample
 To create fields with the constant value 7 if the corresponding field element
-of @file{ifile} is greater than 0, use:
+of @file{ifile} is greater than 0 use:
 @BeginVerbatim
    cdo ifthenc,7 ifile ofile
 @EndVerbatim

doc/tex/mod/Copy

@@ -8,8 +8,8 @@
 @Operators = copy cat
 
 @BeginDescription
-This module contains operators to copy or concatenate datasets. Each
-input dataset must have the same variables with complete time steps.
+This module contains operators to copy or concatenate datasets. Each input
+dataset is required to have the same variables with complete time steps.
 @EndDescription
 @EndModule
 
@@ -26,7 +26,7 @@ Copies all input datasets to @file{ofile}.
 @Title     = Concatenate datasets
 
 @BeginDescription
-Concatenates all input datasets and append the result to the end 
+Concatenates all input datasets and appends the result to the end 
 of @file{ofile}. If @file{ofile} does not exist it will be created.
 @EndDescription
 @EndOperator
@@ -46,7 +46,7 @@ To concatenate 3 datasets with different time steps of the same variables use:
 @BeginVerbatim
    cdo copy ifile1 ifile2 ifile3 ofile
 @EndVerbatim
-If the output dataset already exist and you wish to extend it 
+If the output dataset already exists and you wish to extend it 
 with more time steps use:
 @BeginVerbatim
    cdo cat ifile1 ifile2 ifile3 ofile

doc/tex/mod/Daypctl

@@ -8,15 +8,14 @@
 @Operators = daypctl
 
 @BeginDescription
-This module computes percentiles over all time steps in @file{ifile1}
-of the same day.
+This module computes percentiles over all time steps of the same day in @file{ifile1}.
 The algorithm uses histograms with minimum and maximum bounds given in
 @file{ifile2} and @file{ifile3}, respectively. The default number of
 histogram bins is 100. The default can be overridden by defining the
 environment variable CDO_PCTL_NBINS. The files @file{ifile2} and
-@file{ifile3} must be the result of corresponding daymin and daymax
+@file{ifile3} should be the result of corresponding @mod{daymin} and @mod{daymax}
 operations, respectively.
-The date information for a time step in @file{ofile} is the date of the
+The date information of a time step in @file{ofile} is the date of the
 last contributing time step in @file{ifile1}.
 @EndDescription
 @EndModule
@@ -28,12 +27,15 @@ last contributing time step in @file{ifile1}.
 
 @BeginDescription
 @IfMan
-For every adjacent sequence t_1, ...,t_n of time steps of the same day, it is
+For every adjacent sequence t_1, ...,t_n of time steps of the same day it is
 
 o(t,x) = pth percentile {i(t',x), t_1<t'<=t_n}
 @EndifMan
 @IfDoc
-For every adjacent sequence \begin{math}t_1, ...,t_n\end{math} of time steps of the same day, it is: \\
+\vspace*{1mm}
+For every adjacent sequence \begin{math}t_1, ...,t_n\end{math} of time steps of the same day it is: \\
+\vspace*{1mm}
+
 @BeginMath
 o(t,x) = \mbox{\bf pth percentile} \{i(t',x), t_1 < t' \leq t_n\}
 @EndMath
@@ -55,7 +57,7 @@ Sets the number of histogram bins. The default number is 100.
 
 
 @BeginExample
-To compute the daily 90th percentile of a time series, use:
+To compute the daily 90th percentile of a time series use:
 @BeginVerbatim
    cdo daymin ifile minfile
    cdo daymax ifile maxfile

doc/tex/mod/Daystat

@@ -11,7 +11,7 @@
 This module computes statistical values over time steps of the same day.
 Depending on the actual operator the minimum, maximum, sum, average, variance
 or standard deviation of time steps of the same day is written to @file{ofile}.
-The date information for a time step in @file{ofile} is the date of the last 
+The date information of a time step in @file{ofile} is the date of the last 
 contributing time step in @file{ifile}.
 @EndDescription
 @EndModule
@@ -22,12 +22,12 @@ contributing time step in @file{ifile}.
 
 @BeginDescription
 @IfMan
-For every adjacent sequence t_1, ...,t_n of time steps of the same day, it is
+For every adjacent sequence t_1, ...,t_n of time steps of the same day it is
 
 o(t,x) = min{i(t',x), t_1<t'<=t_n}
 @EndifMan
 @IfDoc
-For every adjacent sequence \begin{math}t_1, ...,t_n\end{math} of time steps of the same day, it is: \\
+For every adjacent sequence \begin{math}t_1, ...,t_n\end{math} of time steps of the same day it is: \\
 @BeginMath
 o(t,x) = \mbox{\bf min}\{i(t',x), t_1 < t' \leq t_n\}
 @EndMath
@@ -41,12 +41,12 @@ o(t,x) = \mbox{\bf min}\{i(t',x), t_1 < t' \leq t_n\}
 
 @BeginDescription
 @IfMan
-For every adjacent sequence t_1, ...,t_n of time steps of the same day, it is
+For every adjacent sequence t_1, ...,t_n of time steps of the same day it is
 
 o(t,x) = max{i(t',x), t_1<t'<=t_n}
 @EndifMan
 @IfDoc
-For every adjacent sequence \begin{math}t_1, ...,t_n\end{math} of time steps of the same day, it is: \\
+For every adjacent sequence \begin{math}t_1, ...,t_n\end{math} of time steps of the same day it is: \\
 @BeginMath
 o(t,x) = \mbox{\bf max}\{i(t',x), t_1 < t' \leq t_n\}
 @EndMath
@@ -60,12 +60,12 @@ o(t,x) = \mbox{\bf max}\{i(t',x), t_1 < t' \leq t_n\}
 
 @BeginDescription
 @IfMan
-For every adjacent sequence t_1, ...,t_n of time steps of the same day, it is
+For every adjacent sequence t_1, ...,t_n of time steps of the same day it is
 
 o(t,x) = sum{i(t',x), t_1<t'<=t_n}
 @EndifMan
 @IfDoc
-For every adjacent sequence \begin{math}t_1, ...,t_n\end{math} of time steps of the same day, it is: \\
+For every adjacent sequence \begin{math}t_1, ...,t_n\end{math} of time steps of the same day it is: \\
 @BeginMath
 o(t,x) = \mbox{\bf sum}\{i(t',x), t_1 < t' \leq t_n\}
 @EndMath
@@ -79,12 +79,12 @@ o(t,x) = \mbox{\bf sum}\{i(t',x), t_1 < t' \leq t_n\}
 
 @BeginDescription
 @IfMan
-For every adjacent sequence t_1, ...,t_n of time steps of the same day, it is
+For every adjacent sequence t_1, ...,t_n of time steps of the same day it is
 
 o(t,x) = mean{i(t',x), t_1<t'<=t_n}
 @EndifMan
 @IfDoc
-For every adjacent sequence \begin{math}t_1, ...,t_n\end{math} of time steps of the same day, it is: \\
+For every adjacent sequence \begin{math}t_1, ...,t_n\end{math} of time steps of the same day it is: \\
 @BeginMath
 o(t,x) = \mbox{\bf mean}\{i(t',x), t_1 < t' \leq t_n\}
 @EndMath
@@ -98,12 +98,12 @@ o(t,x) = \mbox{\bf mean}\{i(t',x), t_1 < t' \leq t_n\}
 
 @BeginDescription
 @IfMan
-For every adjacent sequence t_1, ...,t_n of time steps of the same day, it is
+For every adjacent sequence t_1, ...,t_n of time steps of the same day it is
 
 o(t,x) = avg{i(t',x), t_1<t'<=t_n}
 @EndifMan
 @IfDoc
-For every adjacent sequence \begin{math}t_1, ...,t_n\end{math} of time steps of the same day, it is: \\
+For every adjacent sequence \begin{math}t_1, ...,t_n\end{math} of time steps of the same day it is: \\
 @BeginMath
 o(t,x) = \mbox{\bf avg}\{i(t',x), t_1 < t' \leq t_n\}
 @EndMath
@@ -117,12 +117,12 @@ o(t,x) = \mbox{\bf avg}\{i(t',x), t_1 < t' \leq t_n\}
 
 @BeginDescription
 @IfMan
-For every adjacent sequence t_1, ...,t_n of time steps of the same day, it is
+For every adjacent sequence t_1, ...,t_n of time steps of the same day it is
 
 o(t,x) = var{i(t',x), t_1<t'<=t_n}
 @EndifMan
 @IfDoc
-For every adjacent sequence \begin{math}t_1, ...,t_n\end{math} of time steps of the same day, it is: \\
+For every adjacent sequence \begin{math}t_1, ...,t_n\end{math} of time steps of the same day it is: \\
 @BeginMath
 o(t,x) = \mbox{\bf var}\{i(t',x), t_1 < t' \leq t_n\}
 @EndMath
@@ -136,12 +136,12 @@ o(t,x) = \mbox{\bf var}\{i(t',x), t_1 < t' \leq t_n\}
 
 @BeginDescription
 @IfMan
-For every adjacent sequence t_1, ...,t_n of time steps of the same day, it is
+For every adjacent sequence t_1, ...,t_n of time steps of the same day it is
 
 o(t,x) = std{i(t',x), t_1<t'<=t_n}
 @EndifMan
 @IfDoc
-For every adjacent sequence \begin{math}t_1, ...,t_n\end{math} of time steps of the same day, it is: \\
+For every adjacent sequence \begin{math}t_1, ...,t_n\end{math} of time steps of the same day it is: \\
 @BeginMath
 o(t,x) = \mbox{\bf std}\{i(t',x), t_1 < t' \leq t_n\}
 @EndMath
@@ -151,7 +151,7 @@ o(t,x) = \mbox{\bf std}\{i(t',x), t_1 < t' \leq t_n\}
 
 
 @BeginExample
-To compute the daily mean of a time series, use:
+To compute the daily mean of a time series use:
 @BeginVerbatim
    cdo daymean ifile ofile
 @EndVerbatim

doc/tex/mod/Detrend

@@ -41,12 +41,12 @@ o(t,x) = i(t,x) - (a(x) + b(x)t)
 
 @BeginNote
 This operator has to keep the fields of all time steps concurrently in the memory.
-If not enough memory is available, use the operators @mod{trend} and @mod{subtrend}.
+If not enough memory is available use the operators @mod{trend} and @mod{subtrend}.
 @EndNote
 
 
 @BeginExample
-To detrend the data in @file{ifile} and to store the detrended data in @file{ofile}, use:
+To detrend the data in @file{ifile} and to store the detrended data in @file{ofile} use:
 @BeginVerbatim
   cdo detrend ifile ofile
 @EndVerbatim

doc/tex/mod/Diff

@@ -9,7 +9,7 @@
 
 @BeginDescription
 Compares the contents of two datasets field by field. The input
-datasets must have the same structure and the fields must have 
+datasets need to have the same structure and its fields need to have 
 the same header information and dimensions.
 @EndDescription
 @EndModule
@@ -22,13 +22,13 @@ the same header information and dimensions.
 Provides statistics on differences between two datasets.
 For each pair of fields the operator prints one line with the following information:
 @BeginItemize
-@Item = date and time
-@Item = code number and level
-@Item = size of the grid and number of missing values
-@Item = occurrence of coefficient pairs with different signs
-@Item = occurrence of zero values
-@Item = maxima of absolute difference of coefficient pairs
-@Item = maxima of relative difference of non-zero coefficient pairs with equal signs
+@Item = Date and Time
+@Item = Code number and Level
+@Item = Size of the grid and number of Missing values
+@Item = Occurrence of coefficient pairs with different signs (S)
+@Item = Occurrence of zero values (Z)
+@Item = Maxima of absolute difference of coefficient pairs
+@Item = Maxima of relative difference of non-zero coefficient pairs with equal signs
 @EndItemize
 @EndDescription
 @EndOperator

doc/tex/mod/EcaCdd

@@ -12,7 +12,7 @@ Let @file{ifile} be a time series of daily precipitation amounts RR,
 then counted is the largest number of consecutive days where
 RR is less than 1 mm. A further output variable is the number of dry
 periods of more than 5 days.
-The date information for a time step in @file{ofile} is the date of
+The date information of a time step in @file{ofile} is the date of
 the last contributing time step in @file{ifile}.
 @EndDescription
 @EndModule
@@ -24,8 +24,8 @@ the last contributing time step in @file{ifile}.
 
 
 @BeginExample
-To get the largest number of consecutive dry days for a time series
-of daily precipitation amounts, use:
+To get the largest number of consecutive dry days of a time series
+of daily precipitation amounts use:
 @BeginVerbatim
    cdo eca_cdd rrfile ofile
 @EndVerbatim