title: how can i separate one month and correspond variables in R?
body: <p><img src="https://i.stack.imgur.com/hxAg6.png" alt="enter image description here" /></p>
  <p>I want to separate Time.Month.th in to 2, 1 stand for january, 2 stand for feb. i want to extract 3 column(Time.Month.th  and Temp and BFS) based on the month i separate.  I use R program</p>