+--------------+-------------------+
| airquality   | R Documentation   |
+--------------+-------------------+

New York Air Quality Measurements
---------------------------------

Description
~~~~~~~~~~~

Daily air quality measurements in New York, May to September 1973.

Usage
~~~~~

::

    airquality

Format
~~~~~~

A data frame with 154 observations on 6 variables.

+------------+---------------+-----------+---------------------------+
| ``[,1]``   | ``Ozone``     | numeric   | Ozone (ppb)               |
+------------+---------------+-----------+---------------------------+
| ``[,2]``   | ``Solar.R``   | numeric   | Solar R (lang)            |
+------------+---------------+-----------+---------------------------+
| ``[,3]``   | ``Wind``      | numeric   | Wind (mph)                |
+------------+---------------+-----------+---------------------------+
| ``[,4]``   | ``Temp``      | numeric   | Temperature (degrees F)   |
+------------+---------------+-----------+---------------------------+
| ``[,5]``   | ``Month``     | numeric   | Month (1--12)             |
+------------+---------------+-----------+---------------------------+
| ``[,6]``   | ``Day``       | numeric   | Day of month (1--31)      |
+------------+---------------+-----------+---------------------------+

Details
~~~~~~~

Daily readings of the following air quality values for May 1, 1973 (a
Tuesday) to September 30, 1973.

-  ``Ozone``: Mean ozone in parts per billion from 1300 to 1500 hours at
   Roosevelt Island

-  ``Solar.R``: Solar radiation in Langleys in the frequency band
   4000â€“7700 Angstroms from 0800 to 1200 hours at Central Park

-  ``Wind``: Average wind speed in miles per hour at 0700 and 1000 hours
   at LaGuardia Airport

-  ``Temp``: Maximum daily temperature in degrees Fahrenheit at La
   Guardia Airport.

Source
~~~~~~

The data were obtained from the New York State Department of
Conservation (ozone data) and the National Weather Service
(meteorological data).

References
~~~~~~~~~~

Chambers, J. M., Cleveland, W. S., Kleiner, B. and Tukey, P. A. (1983)
*Graphical Methods for Data Analysis*. Belmont, CA: Wadsworth.

Examples
~~~~~~~~

::

    require(graphics)
    pairs(airquality, panel = panel.smooth, main = "airquality data")

