Description Usage Arguments Details Value Note Author(s) See Also Examples
Selects data for a given visual meteor dataset and specified geographical coordinates of the observing site or interval of geographical coordinates.
1 |
data |
data frame consisting of visual meteor data (rate or magnitude data). |
lat.low |
numeric vector taking a value between -90 (default) and 90, specifying lower boundary of latitude in degrees. |
lat.up |
numeric vector taking a value between -90 and 90 (default), specifying upper boundary of latitude in degrees. |
long.low |
numeric vector taking a value between -180 (default) and 180, specifying lower boundary of longitude in degrees. |
long.up |
numeric vector taking a value between -180 and 180 (default), specifying upper boundary of longitude in degrees. |
If values of arguments lat.low
and lat.up
, as well as long.low
and long.up
, are the same,
filter.gc
selects data for particular observing site.
filter.gc
enables one to select data only by latitude or longitude, with geographical coordinates
being between given boundaries, less, greater or equal to a boundary.
filter.gc
returns data frame with the same number of columns as the argument data
,
containing observations corresponding to geographical coordinates with latitude between lat.low
and lat.up
and
longitude between long.low
and long.up
.
Argument data
has to consist of the columns named "Latitude" and "Longitude".
Kristina Veljkovic
1 2 3 4 5 6 7 8 | ## select 2015 rate and magnitude data for observing site with latitude 44.1583N
## and longitude 19.6869E
filter.gc(rate2015,lat.low=44.1583,lat.up=44.1583,long.low=19.6869,long.up=19.6869)
filter.gc(magn2015,lat.low=44.1583,lat.up=44.1583,long.low=19.6869,long.up=19.6869)
## select 2015 rate and magnitude data corresponding to sites with latitude 60N and above
filter.gc(rate2015,lat.low=60)
filter.gc(magn2015,lat.low=60)
|
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