visualFields (version 0.6.2)

poplr: permutation of Pointwise Linear Regression (PoPLR)

Description

performs the PoPLR analysis from a series of visual-field threshold sensitivities, or TD or PD values over time

Usage

poplr( vf, nperm = 5000, sltest = NULL, truncVal = 1 )

Arguments

vf

vf object with threshold sensitivities, td, or pd values

nperm

number of permutations. Default is 5000

sltest

values for the 1-tailed hypothesis test for all locations. The reference value is not restricted, but it should be either zero (was there any progression?) or negative (was the progression greater than test value?). Default is NULL

truncVal

p-value cut-off for truncation. Default is 1

References

[1] N. O'Leary, B. C. Chauhan, and P. H. Artes. Visual field progression in glaucoma: estimating the overall significance of deterioration with permutation analyses of pointwise linear regression (PoPLR). Investigative Ophthalmology and Visual Science, 53, 2012

See Also

poplr_cstat, poplr_pstat, vflayout_poplr, vfplot_plr

Examples

# NOT RUN {
  
# }
# NOT RUN {
    res <- poplr( vf91016right )
  
# }