Statistical issues about MR

[cshjin]

20 years original weather data will have a lot of missing records.

• count each weather type & compare to actual distribution. (# of hours)
• count # of hours do not have MR (<30 mins)
• cautions to datasets size.

[cshjin]

Done before: f6c705a571fadc9076f42b8f87ec22397940c396