airquality
"Ozone"	"Solar.R"	"Wind"	"Temp"	"Month"	"Day"
"1"	41	190	7.4	67	5	1
"2"	36	118	8	72	5	2
"3"	12	149	12.6	74	5	3
"4"	18	313	11.5	62	5	4
"5"	NA	NA	14.3	56	5	5
fit
List of 13
 $ coefficients : Named num [1:4] -64.3421   1.6521  -3.3336   0.0598
  ..- attr(*, "names")= chr [1:4] "(Intercept)" "Temp" "Wind" "Solar.R"
 $ residuals    : Named num [1:111]   7.955   1.001 -12.823  -0.475  -9.261 ...
  ..- attr(*, "names")= chr [1:111] "1" "2" "3" "4" ...