Example of a data frame from one file with one group of bullet holes.
data(DFlandy03)A data frame with 100 observations on the following 12 variables.
groupa numerical vector with group numbers 1, 2.
distancea numerical vector giving the distance to the target.
aim.xa numerical vector of x-coordinates giving the point of aim.
aim.ya numerical vector of y-coordinates giving the of point of aim.
point.xa numerical vector of absolute x-coordinates of bullet holes.
point.ya numerical vector of absolute y-coordinates of bullet holes.
ammunitiona character vector giving ammunition and lot number.
velocitya numerical vector of chronograph readings in ft/s.
filea character vector with the original file name.
groupVerba character vector designating the group by combining the original file name and ammunition.
seriesa character vector that codes each separate group in an alternative way.
seriesNumlike series but numeric.
distance.unitMeasurement unit distance to target
point.unitMeasurement unit (x,y)-coordinates
4 groups with 25 shots each of .22LR shot at a distance of 50yd. The measurement unit for coordinates is inch, for distance yards.
Data courtesy of Larry Landercasper, 2017.
combineData,
analyzeGroup,
compareGroups
data(DFlandy03)
str(DFlandy03)
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