TOXSWA_cwa. pfm 0.3-8

Usage

TOXSWA_cwa

+ +

Format

+ +

An R6Class generator object.

+ +

Description

+ +

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.

+ +

Fields

+ +

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.

+ +

Methods

+ +

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. +

+ +

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)
+<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
+