Make the summary table with daily min max and mean tempertur

Make the summary table with daily min, max and mean temperture, I need the code instead of the results. (Prefer R, Matlab or Maple), Thanks!

Excel File: https://www.dropbox.com/s/ts8lsu53kn24oqq/table1.xls?dl=1

Simple use function =AVERAGE(B2:B8632), =MIN(B2:B8632) and =MAX(B2:B8632) to get mean, min and max temperature in this very excel file.

https://docs.google.com/spreadsheets/d/1xotE0s4QNqdq24b3dlyRxA3yMpHnPDy2mIg7-yK_Gh0/edit?usp=sharing

Let me know if you face any doubt/problem.