R/getDiffTheta.R

In TIMP: Fitting Separable Nonlinear Models in Spectroscopy and Microscopy

"getDiffTheta" <- function(th, mod) {
  modellist <- mod@modellist
  modeldiff <- mod@modeldiffs
  parorder <- list()
  if (length(modeldiff$change) != 0) {
    thA <- getDiffThetaChange(th, mod)
    th <- thA$th
    mod@parorderchange <- thA$parorder
  }
  if (length(modeldiff$free) != 0 || length(modeldiff$add) != 0) {
    for (diff in append(mod@modeldiffs$free, mod@modeldiffs$add)) {
      j <- diff$dataset[1]
      fixed <- modellist[[j]]@fvecind
      prel <- modellist[[j]]@pvecind
      model <- modellist[[diff$dataset[1]]]
      removepar <- sort(append(fixed[[diff$what]], prel[[diff$what]]))
      if (length(diff$ind) == 2) {
        whichfree <- diff$ind[2]
        if (diff$ind[1] > 1) {
          slW <- slot(model, diff$what)
          whichfree <- whichfree + sum(unlist(lapply(slW, length))[1:(diff$ind[1] - 1)])
        }
        partmp <- slot(model, diff$what)[[diff$ind[1]]][diff$ind[2]]
      } else {
        partmp <- slot(
          model,
          diff$what
        )[diff$ind]
        whichfree <- diff$ind
      }
      if (diff$what %in% model@positivepar) {
        partmp <- log(partmp)
      } else {
        if (length(model@clinde$po$name) > 0) {
          for (i in 1:length(model@clinde[[diff$what]])) {
            parapp <- log(parapp[i])
          }
        }
        if (length(model@chinde[[diff$what]]) > 0) {
          for (i in 1:length(model@chinde[[diff$what]])) {
            parapp <- log(parapp[i])
          }
        }
      }
      removepar <- which(whichfree %in% removepar)
      if (length(removepar) > 0) {
        partmp <- partmp[-removepar]
      }
      if (length(partmp) > 0) {
        ind <- (length(th) + 1):(length(th) + length(partmp))
      } else {
        ind <- vector()
      }
      parorder[[length(parorder) + 1]] <- list(
        name = diff$what,
        ind = ind, rm = removepar, dataset = diff$dataset, indm = diff$ind
      )
      th <- append(th, partmp)
    }
  }
  if (length(modeldiff$rel) != 0) {
    for (diff in modeldiff$rel) {
      removepar <- if (diff$fix) 1:length(diff$start) else vector()
      if (length(removepar) > 0) {
        partmp <- diff$start[-removepar]
      }
      ind <- if (length(partmp) > 0) {
        (length(th) +
          1):(length(th) + length(partmp))
      } else {
        vector()
      }
      parorder[[length(parorder) + 1]] <- list(
        name = diff$what1,
        ind = ind, rm = removepar, dataset = diff$dataset1, indm = diff$ind1
      )
      th <- append(th, partmp)
    }
  }
  if (length(modeldiff$dscal) != 0) {
    for (i in 1:length(modeldiff$dscal)) {
      j <- modeldiff$dscal[[i]]$to
      if (length(modellist[[j]]@drel) != 0) {
        fixed <- modellist[[j]]@fvecind
        prel <- modellist[[j]]@pvecind
        removepar <- sort(append(fixed[["drel"]], prel[["drel"]]))
        parapp <- if (length(removepar) != 0) {
          unlist(slot(
            modellist[[j]],
            "drel"
          ))[-removepar]
        } else {
          unlist(slot(
            modellist[[j]],
            "drel"
          ))
        }
        if (length(parapp) != 0) {
          ind <- (length(th) + 1):(length(th) + length(parapp))
        } else {
          ind <- vector()
        }
        parorder[[length(parorder) + 1]] <- list(
          name = "drel",
          ind = ind, rm = removepar, dataset = j,
          indm = (1:length(modellist[[j]]@drel))
        )
        th <- append(th, parapp)
      }
    }
  }
  mod@parorderdiff <- parorder
  list(theta = th, mod = mod)
}