TXtemp, obtained from the Carbon Dioxide Information and Analysis Center at Oak Ridge National Laboratory, has 17280 rows and 6 columns of data representing monthly temperature records for stations in Texas.data(TXtemp)stacode a numeric vector of the unique station code formed by combining the two-digit state number [state numbers range from 1 to 48] and the four-digit station number (values range from 0008 to 9933);
lat, long numeric vectors identifying the lattitudes and longitudes of the stations in decimal degree.
year a numeric vector comprising the year for the records
month a numeric vector of values 1 to 12, represeting the month for the data
mmtemp a numeric vector of monthly average temperature in Fahrenheit scale.
Of note, the missing values were coded as -99.99.