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authorJohannes Ranke <jranke@uni-bremen.de>2019-05-21 08:54:16 +0200
committerJohannes Ranke <jranke@uni-bremen.de>2019-05-21 08:54:16 +0200
commit84abde72967691d82bbad66eeff4d1ab161530dd (patch)
treec3cfbdaa8b5f35f733d43a50316cade40cdc0b05
parent203364b072697ac154b25569bd9c1a7ba487c9d5 (diff)
Clarify the relation of the two-component error model
in relation to the original version by Rocke and Lorenzato
-rw-r--r--man/synthetic_data_for_UBA.Rd5
1 files changed, 3 insertions, 2 deletions
diff --git a/man/synthetic_data_for_UBA.Rd b/man/synthetic_data_for_UBA.Rd
index f9d3c77b..e910297d 100644
--- a/man/synthetic_data_for_UBA.Rd
+++ b/man/synthetic_data_for_UBA.Rd
@@ -14,7 +14,7 @@
Variance component 'c' is based on the error model from Rocke and Lorenzato (1995), with the
minimum standard deviation (for small y values) of 0.5, and a proportionality constant of 0.07
for the increase of the standard deviation with y. Note that this is a simplified version
- of the error model proposed by Rocke and Lorenzato (1995), as in their model the error of the
+ of the error model proposed by Rocke and Lorenzato (1995), as in their model the error of the
measured values approximates lognormal distribution for high values, whereas we are using
normally distributed error components all along.
@@ -116,7 +116,8 @@ add_err = function(d, sdfunc, LOD = 0.1, reps = 2, seed = 123456789)
return(d_NA)
}
-# The following is the two-component model of Rocke and Lorenzato (1995)
+# The following is the simplified version of the two-component model of Rocke
+# and Lorenzato (1995)
sdfunc_twocomp = function(value, sd_low, rsd_high) {
sqrt(sd_low^2 + value^2 * rsd_high^2)
}

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