Large Data Set

Question 1

What are trace values?

Answer 1

These are values that measure rainfall - trace means the values of rainfall are less than 0.05mm

In order to clean data (for the use of mean and sd) use 0.025mm

Does not appear overseas

Question 2

What are n/a values?

Answer 2

Not available values; values are n/a for the first two weeks of may 1987 for the variables:

-Daily total sunshine
-Daily mean windspeed (knots and Beaufort conversion)
-Daily maximum gust

Does not appear in overseas