#' max_delta
#'
#' Helper function for reordering levels of calcium response based on the maximum change in reponse
#' aligned to the end of a pulse. Mainly for use in plotGCaMP_multi.R. End value is derived from input
#' in plotGCaMP_multi.R
#'
#' @export
#' @examples ggplot(aes(x = time, y = fct_reorder(animal_num, delF, max_delta)))
max_delta <- function(x, end = 60) {
# if(max(x[(end*4 - 10):(end*4 + 20)]) > 0) {
# max(x[(end*4 - 10):(end*4 + 20)]) -
# min(x[(end*4 - 10):(end*4 + 20)])
# } else {
# max(x[(end*4 - 10):(end*4 + 20)]) +
# min(x[(end*4 -10):(end*4 + 20)])
# }
#
# new version:
maxval <- max(x[(end*4):(end*4 + 20)]) - mean(x[(end*4 - 10):(end*4)])
minval <- min(x[(end*4):(end*4 + 20)]) - mean(x[(end*4 - 10):(end*4)])
if(abs(maxval) > abs(minval)) {
return(maxval)
} else {
return(minval)
}
}
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