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#' Initial verification of input
#'
#' Internal, auxiliary functions
#'
#' @param data is an input object that should be a data.frame
#' @param signal is a character object that indicates input columns of data
#' @param response is a character vector that indicates output's columns of data
#' @param side_variables is a character vector that indicates side variables' columns of data
#' @return If all initial data is valid, string "ok" is returned. Otherwise, error is given.
#' @keywords internal
#' @examples
#' data=data_example1
#' SLEMI:::func_input_checks(data=data,signal="signal",
#' response="response",side_variables="sideVar")
#'
#' # The following examples will give errors, because the data has
#' # inconsistent format for the analysis. Only to check the adequacy of
#' # initial checks.
#' # data=as.matrix(data_example1)
#' # SLEMI:::func_input_checks(data=data,signal="signal",
#' # response="response",side_variables="sideVar")
#' # data=data_example1
#' # SLEMI:::func_input_checks(data=data,signal="input",
#' # response="response",side_variables="sideVar")
func_input_checks<-function(data,signal,response,side_variables){
if (!is.data.frame(data)) {
stop('data is not in data.frame format')
}
if ( sum(colnames(data)==signal)==0 ) {
stop('There is no column described as signal in data')
}
if (!sum(colnames(data) %in% response)==length(response) ) {
stop('There is no column described as response in data')
}
if ( !sum(colnames(data)%in%side_variables)==length(side_variables) ) {
stop('There is no column described as side_variables in data')
}
if ( any(apply(data,1,function(x) any(is.na(x)) )) ) {
stop("There are NAs in data")
}
out="ok"
}
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