doc: small fixes to dseries/reporting slides

doc/dseries-and-reporting/dseriesReporting.tex

@@ -436,9 +436,9 @@ would be transformed into
     \begin{alltt}
   >> ts = dseries(FILENAME);
     \end{alltt}
-    \myitem File format (\texttt{.csv, .xls}): dates in first column (using the standard format:
-    199Q1 for quarterly data, 1990Y for annual data, \dots) and (optional)
-    variable names in the first row
+    \myitem File format (\texttt{.csv, .xls}): dates (optional) in first column (using the
+    standard format: 199Q1 for quarterly data, 1990Y for annual data, \dots) and variable
+    names (optional) in the first row
     \myitem File format (\texttt{.m, .mat}): must define the variables \texttt{INIT\_\_},
     \texttt{NAMES\_\_}, and, optionally, \texttt{TEX\_\_}. More info in the
     manual. Data are vectors.
@@ -448,10 +448,10 @@ would be transformed into
       cons = randn(100,1);
     \end{alltt}
   \end{itemize}
-  Create an empty time series. Useful for programatically creating a series.
+  Create an empty time series. Useful for renaming dseries.
   \begin{itemize}
-    \myitem \texttt{ts=dseries();}
-    \myitem \texttt{ts=dseries(dates(`1999y'));}
+    \myitem \texttt{tseries = dseries();}
+    \myitem \texttt{ts = tseries(randn(3,2));}
   \end{itemize}
 \end{frame}