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| ===Old R-code=== | | ===Old R-code=== |
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| <rcode name="answer" label="Initialise functions" include="page:OpasnetBaseUtils|name:generic">
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| ############### decisions.applyx takes a decision table and applies that to an assessment.
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| ## dec is a decision data.frame that must have columns Decision, Option, Variable, Cell, Change, Result. It can have several variables.
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| decisions.applyx <- function(dec, assessment = NULL) {
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| out <- as.list(unique(dec$Variable))
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| names(out) <- as.character(unique(dec$Variable))
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| for(variables in unique(dec$Variable)) { # Take one variable at a time.
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| dec.var <- dec[dec$Variable == variables, ] # dec.var = variable-specific decisions
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| scenarios <- data.frame(temp = 1)
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| for(decisions in unique(dec.var$Decision)) { # Add BAU option to each decision and merge decisions.
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| temp <- as.character(dec.var[dec.var$Decision == decisions, "Option"])
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| temp <- data.frame(Options = c(temp, "BAU"))
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| colnames(temp) <- decisions
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| scenarios <- merge(scenarios, temp)
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| }
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| if(!is.null(assessment)) {
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| var <- assessment@vars[[as.character(dec.var$Variable[1])]]
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| } else {
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| if(exists(as.character(dec.var$Variable[1])))
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| {var <- get(as.character(dec.var$Variable[1]))
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| } else {
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| stop()
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| }
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| }
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| var <- merge(scenarios[colnames(scenarios) != "temp"], var)
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| for(s in 1:nrow(dec.var)) { # Each row in decision handled separately
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| cell <- gsub("^[ \t]+|[ \t]+$", "", as.character(dec$Cell[s])) # Leading and trailing whitespaces removed.
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| cell <- gsub(":[ \t]+", ":", cell) # Whitespaces removed after :
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| cell <- gsub(";[ \t]+", ";", cell) # Whitespaces removed after ;
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| cell <- gsub("[ \t]+:", ":", cell) # Whitespaces removed before :
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| cell <- gsub("[ \t]+;", ";", cell) # Whitespaces removed before ;
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| cell <- strsplit(cell, split = ";") # Separate cell identifiers (indices and locations)
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| cell <- strsplit(cell[[1]], split = ":")
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| cond <- as.character(dec.var$Decision[s])
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| cond <- var[, cond] == as.character(dec.var$Option[s]) # Only the rows with the relevant option.
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| for(r in 1:length(cell)) { # All Cell conditions extracted and combined with AND.
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| cond <- cond * (var[, cell[[r]][1]] == cell[[r]][2])
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| }
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| cond <- as.logical(cond)
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| if(dec.var$Change[s] == "Replace" ) {var[cond, "Result"] <- dec.var$Result[s]}
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| if(dec.var$Change[s] == "Add" ) {var[cond, "Result"] <- dec.var$Result[s] + var[cond, "Result"]}
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| if(dec.var$Change[s] == "Multiply") {var[cond, "Result"] <- dec.var$Result[s] * var[cond, "Result"]}
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| }
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| out[[variables]] <- var
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| }
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| return(out)
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| }
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| </rcode>
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| '''Test code | | '''Test code |
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| out <- as.list(unique(dec$Variable)) | | out <- as.list(unique(dec$Variable)) |
| names(out) <- as.character(unique(dec$Variable)) | | names(out) <- as.character(unique(dec$Variable)) |
| for(variables in unique(dec$Variable)) { # Take one variable at a time. | | # for(variables in unique(dec$Variable)) { # Take one variable at a time. |
| | variables <- unique(dec$Variable)[1] |
| dec.var <- dec[dec$Variable == variables, ] # dec.var = variable-specific decisions | | dec.var <- dec[dec$Variable == variables, ] # dec.var = variable-specific decisions |
| scenarios <- data.frame(temp = 1) | | scenarios <- data.frame(temp = 1) |
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| {var <- get(as.character(dec.var$Variable[1])) | | {var <- get(as.character(dec.var$Variable[1])) |
| } else { | | } else { |
| stop() | | stop(paste(variables, " not defined, aborting...")) |
| } | | } |
| } | | } |
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| out[[variables]] <- var | | out[[variables]] <- var |
| }
| | # } |
| out | | return(out) |
| </rcode> | | </rcode> |
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