TOXSWA_cwa. pfm 0.3-7

Usage

TOXSWA_cwa

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Format

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An R6Class generator object.

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Description

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An R6 class for holding TOXSWA cwa concentration data and some associated statistics. -Usually, an instance of this class will be generated by read.TOXSWA_cwa.

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Fields

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filename: Length one character vector.
basedir: Length one character vector.
segment: Length one integer, specifying for which segment the cwa data were read.
cwas: Dataframe holding the concentrations.
events: List of dataframes holding the event statistics for each threshold.
windows: Matrix of maximum time weighted average concentrations (TWAC_max) -and areas under the curve in µg/day * h (AUC_max_h) or µg/day * d (AUC_max_d) -for the requested moving window sizes in days.

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Methods

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get_events(threshold, total = FALSE): - Populate a datataframe with event information for the specified threshold value - in µg/L. If total = TRUE, the total concentration including the amount - adsorbed to suspended matter will be used. The resulting dataframe is stored in the - events field of the object. -
moving_windows(windows, total = FALSE): - Add to the windows field described above. - Again, if total = TRUE, the total concentration including the amount - adsorbed to suspended matter will be used. -

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Examples

H_sw_R1_stream  <- read.TOXSWA_cwa("00003s_pa.cwa",
-                                 basedir = "SwashProjects/project_H_sw/TOXSWA",
-                                 zipfile = system.file("testdata/SwashProjects.zip",
-                                             package = "pfm"))
-H_sw_R1_stream$get_events(c(2, 10))
-H_sw_R1_stream$moving_windows(c(7, 21))
-print(H_sw_R1_stream)
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-<TOXSWA_cwa> data from file 00003s_pa.cwa segment 20 
-               datetime     t t_firstjan t_rel_to_max cwa_mug_per_L
-20  1978-10-01 00:00:00 0.000   273.0000      -55.333             0
-40  1978-10-01 01:00:00 0.042   273.0417      -55.291             0
-60  1978-10-01 02:00:00 0.083   273.0833      -55.250             0
-80  1978-10-01 03:00:00 0.125   273.1250      -55.208             0
-100 1978-10-01 04:00:00 0.167   273.1667      -55.166             0
-120 1978-10-01 05:00:00 0.208   273.2083      -55.125             0
-    cwa_tot_mug_per_L
-20                  0
-40                  0
-60                  0
-80                  0
-100                 0
-120                 0
-Moving window analysis
-   window  max_TWAC max_AUC_h max_AUC_d
-1  7 days 2.3926551  401.9660  16.74859
-2 21 days 0.8369248  421.8101  17.57542
-Event statistics for threshold 2 
-  t_start   cwa_max duration pre_interval     AUC_h     AUC_d
-1  44.375  4.167238    0.208       44.375  17.77202  0.740501
-2  55.042 40.584010    0.583       10.459 398.21189 16.592162
-Event statistics for threshold 10 
-  t_start  cwa_max duration pre_interval   AUC_h    AUC_d
-1  55.083 40.58401    0.459       55.083 379.433 15.80971
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