MetFns (version 2.1.0)

mag.distr: Summarized magnitude distribution

Description

Table and graphical representation of summarized magnitude distribution for a given magnitude dataset, specified meteor shower and time period.

Usage

mag.distr(data,year,month.beg,month.end=month.beg,day.beg,day.end=day.beg,
time.beg=0,time.end=2359,shw)

Arguments

data

data frame consisting of visual meteor magnitude data.

year

numeric vector of length 4 specifying year.

month.beg

numeric vector specifying the beginning month.

month.end

numeric vector specifying the ending month. By default, month.end is set to be equal to month.beg.

day.beg

numeric vector specifying the beginning day.

day.end

numeric vector specifying the ending day. By default, day.end is set to be equal to day.beg.

time.beg

numeric vector (0-2359) specifying lower boundary of time in hours and minutes, corresponding to day.beg. By default, time.beg is set to be equal to 0.

time.end

numeric vector(0-2359) specifying upper boundary of time in hours and minutes, corresponding to day.end. By default, time.end is set to be equal to 2359.

shw

character string consisting of three capital letters which represent meteor shower code.

Value

The histogram cells are intervals of length 1, with midpoints at magnitude values.

Details

Summarized magnitude distribution is formed by summing frequencies of all observers for each magnitude value.

References

http://www.imo.net/data/visual

See Also

pop.index

Examples

## select data for observations of Perseids, period 12-14th August  2007 
## and make graphics of magnitude distribution
data(magn07)
magnPer<-filter(magn07,shw="PER", year=2007, month.beg=8, day.beg=12, day.end=14)
mag.distr(magnPer,year=2007, month.beg=8, day.beg=12, day.end=14, shw="PER")