metaSDTreg (version 0.2.1)

starting.vals.PPO: Starting values from PPO

Description

Used by metaSDTreg to calculate starting values using the partial proportional odds model as implemented in ordinal. Internal function.

Usage

starting.vals.PPO(formula0, data0, control0, L0, K0, n.covar0)

Value

A named vector of starting values.

Arguments

formula0

See metaSDTreg.

data0

Data frame.

control0

See metaSDTcontrol.

L0

Number of levels in ordinal type 2 response.

K0

Number of levels of ordinal response 'A'.

n.covar0

Number of covariates aside from the 'signal' variable.

Details

The function calls the clm function using all.vars(update(formula0, . ~ . - signal)) as the formula argument and using ~ signal as the nominal argument (also see metaSDTreg for the meaning of the signal variable). The coefficients of the signal variable are weighted together within the noise- and signal-specific type 2 responses using their inverse standard errors as weights.