Message-ID: <1349429271694-4645135.post@n4.nabble.com>
Date: 2012-10-05T09:27:51Z
From: fxen3k
Subject: Calculating the mean in one column with empty cells
Hi all,
I recently tried to calculate the mean and the median just for one column.
In this column I have numbers with some empty cells due to missing data.
So how can I calculate the mean just for the filled cells?
I tried:
mean(dataSet2$ac_60d_4d_after_ann[!is.na(master$ac_60d_4d_after_ann)],
na.rm=TRUE)
But the output was different to the calculation I died in Microsoft Excel.
Thanks in advance,
Felix
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