samon (version 4.0.2)

samonDataCheck: Samon Data Check

Description

Checks data for intermittent missing or monotone missing pattern

Usage

samonDataCheck( data )

Value

Returns a list with items: N the number or rows in data, NT the number of columns in data, missingBaseline which is set to 1 if any baseline data is missing, and, interMissing, indicating if there are any intermittent data.

desc a matrix of dimension N by 4 with each row representing the same row in the original data. Columns are: col 1: 1 if non-missing baseline value col 2: last available time col 3: last available observation col 4: number of non missing values

Note that col2 - col4 gives the number of intermittent missing values.

missingPatterns, a list of missing patterns found in the data NmissingTables, frequencies of missing patterns, and PmissingTable the proportion of each missing pattern in the data.

Arguments

data

matrix with (i,j) entry representing value for subject i at time-point j.

Details

Returns a basic summary of samon input data. This includes a check that there is not missing data at baseline.

Examples

 # monotone missing
 data("samonPANSS1")
 chkm <- samonDataCheck( samonPANSS1 )

 # non monotone missing
 data("VAS1")
 chknm <- samonDataCheck( VAS1 )