Polish

Convert_Matlab/Documentation_texfol/documentation.tex

@@ -66,11 +66,11 @@ equivalent ways: either by a couple date $d$ and eddy index $e$ at
 that date, or by a unique identifier $n$, which we can call a \og node
 index\fg{}.
 
-For a given date, let $d$ be the corresponding number of days since January
-\nth{1}, 1950. Let $d_1$ be the value of $d$ for the first date of the
-dataset. We call date index the integer:
+For a given date, let $d$ be the corresponding number of days since
+January \nth{1}, 1950. Let $d_\mathrm{init}$ be the value of $d$ for
+the first date of the dataset. We call date index the integer:
 \begin{equation*}
-  k = d - d_1
+  k = d - d_\mathrm{init}
 \end{equation*}
 So the first value of $k$ is 0.