qdec.table.skeleton {fsbrain} | R Documentation |
Generate skeleton dataframe for FreeSurfer QDEC long file from subjects list.
Description
Generate skeleton dataframe for FreeSurfer QDEC long file from subjects list.
Usage
qdec.table.skeleton(
subjects_list,
isi = rep(0.8, length(subjects_list)),
isi_name = "years",
timepoint_names = c("_MR1", "_MR2")
)
Arguments
subjects_list |
vector of character strings, the Freesurfer subject IDs (cross-sectional names, without any suffixes like |
isi |
numerical vector, the inter-scan interval for the subjects, in a unit of your choice. Typically in years. |
isi_name |
character string, the name for the isi columns. Defaults to "years". |
timepoint_names |
vector of character strings, the timepoint names. These are mandatory for QDEC, so there should be very little reason to change them. Leave along unless you know what you are doing. |
Value
data.frame with 3 columns named fsid and fsid-base and 'isi_name', a data.frame to use with the demographics.to.qdec.table.dat
function.
See Also
The function demographics.to.qdec.table.dat
to write the result to a QDEC file.
Examples
dem = data.frame("ID"=paste("subject", seq(5), sep=""),
"age"=sample.int(20, 5)+10L, "isi"=rnorm(5, 2.0, 0.1)); #sample data.
qdec.table.skeleton(dem$ID, dem$isi);