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\label{Spreadsheet_Functions}
The following functions are available in the spreadsheet:
\begin{itemize}
\item \texttt{\&NUM(range)} - number of non-empty cells in range
\index{NUM}
\item \texttt{\&BIN(low, high, range)} - number of non-empty cells in
range with values between low and high
\index{BIN}
\item \texttt{\&SUM(range)} - sum of the non-empty cells in range
\index{SUM}
\item \texttt{\&MEAN(range)} - mean value of non-empty cells in range
\index{MEAN}
\item \texttt{\&STDDEV(range)} - standard deviation of non-empty cells
in range
\index{STDDEV}
\item \texttt{\&PROD(range)} - product of non-empty cells in range
\index{PROD}
\item \texttt{\&MAX(range)} - maximum value of non-empty cell in range
\index{MAX}
\item \texttt{\&MIN(range)} - minimum value of non-empty cells in
range
\index{MIN}
\item \texttt{\&SUMMAX(n ,range)} - sum of the maximum n non-empty
cells in range
\index{SUMMAX}
\item \texttt{\&SUMMIN(n, range)} - sum of the minimum n non-empty
cells in range
\index{SUMMIN}
\item \texttt{\&EXT(expression)} - access to EXT function in lonnet
\index{EXT}
\end{itemize}
In addition, non-IO Perl functions work in cells, which is internally
evaluated within a safe space. Field names and Column-Row combinations
can be used as variables.
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