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				@@ -2148,7 +2148,7 @@ Operations]]).  For example 
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				   required to not convert empty fields to 0.  =f-1= is an optional 
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				   Calc format string similar to =%.1f= but leaves empty results empty. 
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				-- =if(typeof(vmean($1..$7)) == 12, string(""), vmean($1..$7); E= :: 
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				+- =if(typeof(vmean($1..$7)) == 12, string(""), vmean($1..$7)); E= :: 
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				   Mean value of a range unless there is any empty field.  Every field 
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				   in the range that is empty is replaced by =nan= which lets =vmean= 
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