Evaluation of example datasets from Attachment 1 to the US EPA SOP for the NAFTA guidance • mkin

 print(p12b)

## Sums of squares:
 ##      SFO     IORE     DFOP 
@@ -742,14 +727,14 @@ overparameterisation.
 
 Example on page 13
 
-+ p13 <- nafta(NAFTA_SOP_Attachment[["p13"]])
 ## The SFO model is rejected as S_SFO is equal or higher than the critical value S_c
 ## The half-life obtained from the IORE model may be used
--plot(p13)
++plot(p13)
 
-+ print(p13)
 ## Sums of squares:
 ##      SFO     IORE     DFOP 
@@ -794,18 +779,17 @@ overparameterisation.
 
 DT50 not observed in the study and DFOP problems in PestDF
 
-+ p14 <- nafta(NAFTA_SOP_Attachment[["p14"]])
 ## Warning in sqrt(diag(covar)): NaNs produced
-## Warning in sqrt(1/diag(V)): NaNs produced
-## Warning in cov2cor(ans$covar): diag(.) had 0 or NA entries; non-finite result
-## is doubtful
+## Warning in cov2cor(ans$covar): diag(V) had non-positive or NA entries; the
+## non-finite result may be dubious
 ## The SFO model is rejected as S_SFO is equal or higher than the critical value S_c
 ## The half-life obtained from the IORE model may be used
--plot(p14)
++plot(p14)
 
-+ print(p14)
 ## Sums of squares:
 ##      SFO     IORE     DFOP 
@@ -852,18 +836,17 @@ same results in mkin and PestDF.
 
 N is less than 1 and DFOP fraction parameter is below zero
 
-+ p15a <- nafta(NAFTA_SOP_Attachment[["p15a"]])
 ## Warning in sqrt(diag(covar)): NaNs produced
-## Warning in sqrt(1/diag(V)): NaNs produced
-## Warning in cov2cor(ans$covar): diag(.) had 0 or NA entries; non-finite result
-## is doubtful
+## Warning in cov2cor(ans$covar): diag(V) had non-positive or NA entries; the
+## non-finite result may be dubious
 ## The SFO model is rejected as S_SFO is equal or higher than the critical value S_c
 ## The half-life obtained from the IORE model may be used
--plot(p15a)
++plot(p15a)
 
-+ print(p15a)
 ## Sums of squares:
 ##      SFO     IORE     DFOP 
@@ -903,16 +886,16 @@ same results in mkin and PestDF.
 ## 
 ## Representative half-life:
 ## [1] 41.33
-+ p15b <- nafta(NAFTA_SOP_Attachment[["p15b"]])
 ## Warning in summary.mkinfit(x): Could not calculate correlation; no covariance
 ## matrix
 ## The SFO model is rejected as S_SFO is equal or higher than the critical value S_c
 ## The half-life obtained from the IORE model may be used
--plot(p15b)
++plot(p15b)
 
-+ print(p15b)
 ## Sums of squares:
 ##       SFO      IORE      DFOP 
@@ -960,16 +943,16 @@ mkin and PestDF.
 
 The DFOP fraction parameter is greater than 1
 
-+ p16 <- nafta(NAFTA_SOP_Attachment[["p16"]])
 ## The SFO model is rejected as S_SFO is equal or higher than the critical value S_c
 ## The representative half-life of the IORE model is longer than the one corresponding
 ## to the terminal degradation rate found with the DFOP model.
 ## The representative half-life obtained from the DFOP model may be used
--plot(p16)
++plot(p16)
 
-+ print(p16)
 ## Sums of squares:
 ##      SFO     IORE     DFOP 
@@ -1010,10 +993,12 @@ mkin and PestDF.
 ## Representative half-life:
 ## [1] 8.93
 In PestDF, the DFOP fit seems to have stuck in a local minimum, as
-mkin finds a solution with a much lower \(\chi^2\) error level. As the half-life from
-the slower rate constant of the DFOP model is larger than the IORE
-derived half-life, the NAFTA recommendation obtained with mkin is to use
-the DFOP representative half-life of 8.9 days.
+mkin finds a solution with a much lower
+ $\chi^2$ 
+error level. As the half-life from the slower rate constant of the DFOP
+model is larger than the IORE derived half-life, the NAFTA
+recommendation obtained with mkin is to use the DFOP representative
+half-life of 8.9 days.
 
 
 Conclusions
@@ -1038,28 +1023,26 @@ Pesticide Degradation.” On this page
+  On this page
     
 

 
 
 
     
-  
-Developed by Johannes Ranke.
+  Developed by Johannes Ranke.
 
 
 
-  
-Site built with pkgdown 2.0.7.
+  Site built with pkgdown 2.1.1.
 
 
     
 
 
-  
 
-  
+
+
 
   
 
-- 
cgit v1.2.3

DT50 not observed in the study and DFOP problems in PestDF

N is less than 1 and DFOP fraction parameter is below zero

The DFOP fraction parameter is greater than 1

Conclusions @@ -1038,28 +1023,26 @@ Pesticide Degradation.” On this page + On this page

Conclusions @@ -1038,28 +1023,26 @@ Pesticide Degradation.”
On this page
+
On this page