Generate initial value for parameters
setinitvalues(npred = npred, np = np, npred_miss = npred_miss,
npred_sub = npred_sub, nmiss = nmiss, nsid = nsid)
number of predictors for the completed data regression model
number of second level unit i.e. proteins/genes
number of predictors for missingness
number of predictors for subjects
number of observations with missing responses values
number of subjects
u_mean initial value of second level unit mean i.e. mean of protein abundance for protein 1
u_std initial value of second level unit standard deviation i.e. std of protein abundance for protein 1
beta2_mean initial mean value for sampling unit ,i.e. subject
beta_Std inital std for sampling unit
beta2_theta_shape inital shape value for gamma distributed beta_std
beta2_theta_rate inital rate value for gamma distributed beta_std