Description Usage Arguments Details Value Author(s) See Also Examples
Simulates a dataframe representing data from a method comparison study. It
is returned as a Meth
object.
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Ni 
The number of items (patient, animal, sample, unit etc.) 
Nm 
The number of methods of measurement. 
Nr 
The (maximal) number of replicate measurements for each (item,method) pair. 
nr 
The minimal number of replicate measurements for each
(item,method) pair. If 
alpha 
A vector of methodspecific intercepts for the linear equation relating the "true" underlying item mean measurement to the mean measurement on each method. 
beta 
A vector of methodspecific slopes for the linear equation relating the "true" underlying item mean measurement to the mean measurement on each method. 
mu.range 
The range across items of the "true" mean measurement. Item
means are uniformly spaced across the range. If a vector length 
sigma.mi 
A vector of methodspecific standard deviations for a method by item random effect. Some or all components can be zero. 
sigma.ir 
Methodspecific standard deviations for the item by replicate random effect. 
sigma.mir 
A vector of methodspecific residual standard deviations for a method by item by replicate random effect (residual variation). All components must be greater than zero. 
m.thin 
Fraction of the observations from each method to keep. 
i.thin 
Fraction of the observations from each item to keep. If both

Data are simulated according to the following model for an observation y_mir:
y_mir = alpha_m + beta_m*(mu_i+b_ir+c_mi) + e_mir
where
b_ir is a random item
by repl
interaction (with
standard deviation for method m the corresponding component of the
vector sigma_ir), c_mi is a random
meth
by item
interaction (with standard deviation for method
m the corresponding component of the vector sigma_mi)
and e_mir is a residual error term (with standard deviation
for method m the corresponding component of the vector
sigma_mir). The mu_i's are uniformly spaced
in a range specified by mu.range
.
A Meth
object, i.e. dataframe with columns
meth
, item
, repl
and y
, representing results
from a method comparison study.
Lyle Gurrin, University of Melbourne, http://www.epi.unimelb.edu.au/about/staff/gurrinlyle
Bendix Carstensen, Steno Diabetes Center, http://BendixCarstensen.com
summary.Meth
, plot.Meth
,
MCmcmc
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