Update of 2014_pm25_daily_average.txt --> 2015_pm25_daily_average.txt - new vars?

#1

To Whom it May Concern,

In comparing the 2014_pm25_daily_average.txt and 2015_pm25_daily_average.txt files, I see a number of changes:

  1. The date format has changed and includes data from a range of years
  2. 2014 data has a “FIPS” variable and 2015 data has a “Loc_label1” variable name
  3. 2014 data has “pm25_daily_average_ug_m3_” and “pm25_daily_average_stderr_ug_m3_” variables; 2015 data has “Prediction” and “SEpred” variables

Does anyone have insight into:

  • What the new Date variable refers to? (and why the format changed?)
  • If the FIPS and loc_label1 variables are equivalent?
  • if the “pm25_daily_average_ug_m3_” and “Prediction” variables are equivalent?
  • if the “pm25_daily_average_stderr_ug_m3_” and “SEPred” variables are equivalent?

Thanks in advance!

#2

Greetings. I am not sure which files you are referring to. Can you please provide a bit more information on the source of these files so that we can get you matched up with the appropriate person to answer your question.