Description Usage Arguments Details Value Author(s) See Also Examples
Function genstatistic
computes a set of statistic according to demands on evaluation of Genasis and GMP data.
1 | genstatistic(x, y=NA, input="openair", pollutant=NA, by.years=FALSE)
|
x |
vector of concentration values or data frame of "genasis"/"openair" type. See 'Details' for more detailed description of both data types. |
y |
vector of measurement dates in the case of vector input only. |
input |
type of data frame in the case of data frame input. The allowed values are |
pollutant |
name of the pollutant(s), which will be included into resulting data frame. |
by.years |
logical. Should the statistics be computed for each year separately? |
The genstatistic
function provides a set of descriptive statistics, commonly used when evaluating Genasis datasets. The resulting table contains 18 columns (19 in the variant with by.years=TRUE
):
pollutant
name of the compound as taken from x
.
year
the year, for which the summary statistics are computed (only if by.years=TRUE
).
n
number of valid results used for calculations of the summary statistics.
mean
arithmetic mean of concentration values.
sd
standard deviation of concentration values.
geom. mean
geometric mean of concentration values.
geom. sd
geometric standard deviation.
min
minimal value.
median
median of concentration values.
max
maximal value.
Pearson
Pearson correlation (product moment) to time, available if at least 3 concentration values are present.
Pp
p value of Pearson trend test, available if at least 3 concentration values are present.
Daniels
Daniels trend test, available if at least 3 concentration values are present.
Dp
p value of Daniels trend test, available if at least 3 concentration values are present.
Mann-Kendall
Mann-Kendall tau, see MannKendall, available if at least 4 concentration values are present.
MKp
p-value of Mann-Kendall trend test, for metodic, see MannKendall, available if at least 3 concentration values are present.
LS slope
linear regression line (least squares fitting) slope.
TS slope
Theil-Sen linear regression line slope.
delta
difference between the final and the initial concentration value in the period.
res |
data frame containing 18 (19 in case of |
Jiri Jarkovsky
Jiri Kalina
kalina@mail.muni.cz
genloq, genoutlier, genhistogram, genpastoact,
genanaggr, genplot, gentransform, genwhisker
1 2 3 4 5 6 7 8 9 10 11 12 | ## Vector input.
genstatistic(c(0.123,0.158,0.087,0.252,0.211,0.154),
c("2012-01-10","2012-08-17","2012-12-12",
"2013-04-09","2013-08-08","2013-12-10"),
pollutant=c("pp-DDE"),by.years=TRUE)
## Use of example data from the package:
data(kosetice.pas.genasis)
genstatistic(kosetice.pas.genasis,input="genasis")
data(kosetice.pas.openair)
genstatistic(genpastoact(genoutlier(kosetice.pas.openair[,c(1:4,20:26)],
plot=FALSE)$res,method="auto"))
|
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