Opasnet Base Connection for R: Difference between revisions

From Opasnet
Jump to navigation Jump to search
Line 168: Line 168:
  } else acctype <- 4  
  } else acctype <- 4  
  } else acctype <- 4
  } else acctype <- 4
  if (acttype != 4&5) stop ("proper acttype not given")
  if (acttype != 4 & acttype != 5) stop ("proper acttype not given")
  <nowiki>sqlQuery(db, paste('INSERT INTO act (acttype_id, who, comments) VALUES (', acttype, ',"', who, '","R upload")', sep = ''))</nowiki>
  <nowiki>sqlQuery(db, paste('INSERT INTO act (acttype_id, who, comments) VALUES (', acttype, ',"', who, '","R upload")', sep = ''))</nowiki>
  act_id <- sqlQuery(db, "SELECT id FROM act ORDER BY id DESC LIMIT 1")[1,1]
  act_id <- sqlQuery(db, "SELECT id FROM act ORDER BY id DESC LIMIT 1")[1,1]

Revision as of 07:43, 12 October 2010


Code for R for the purpose of interacting with the Opasnet Base is collected on this page. To use it, copy paste the code to R; this defines the functions, after which they can be called for in R.

Package dependencies

These packages are required for most of the code to work. Load these first (copy-pasteable). 

library(utils)
library(RODBC)

Setup

Establishes the connection to the database. Copy paste first. 

db <- odbcConnect("opasnet_base")
  • Assuming "opasnet_base" is a correctly defined DSN.
    • Note that uploading requires writing permissions.

Downloading data

Functions

  • Now simplified, a lot faster. Copy paste second.
op_baseGetData <- function(db, ident) {
	obj_id <- sqlQuery(db, paste('SELECT id FROM obj WHERE ident = "', ident, '"', sep=''))[1,1]
	series_id <- sqlQuery(db, paste('SELECT series_id FROM actobj WHERE obj_id = ', obj_id, 
		' ORDER BY series_id DESC LIMIT 1'))[1,1]
	Data <- sqlQuery(db, paste('SELECT cell.id, res.obs, obj.name AS ind, loc.location AS loc, res.result', 
		' FROM actobj LEFT JOIN cell ON actobj.id = cell.actobj_id LEFT JOIN res ON cell.id =', 
		' res.cell_id LEFT JOIN loccell ON cell.id = loccell.cell_id LEFT JOIN loc ON loccell.loc_id',
		' = loc.id LEFT JOIN obj ON loc.obj_id_i = obj.id WHERE actobj.obj_id = ', obj_id, 
		' AND actobj.series_id = ', series_id, ' ORDER BY id, obs, ind', sep = ''))
	nind <- length(levels(Data[,3]))
	nres <- nrow(Data)/nind
	dataframe <- Data[1:nres*nind, c(1,2)]
	for (i in nind:1) {
		dataframe[,2 + nind - i + 1] <- Data[1:nres*nind - i + 1, 4]
		colnames(dataframe)[2 + nind - i + 1] <- as.character(Data[nind - i + 1, 3])
	}
	dataframe[,3 + nind] <- Data[1:nres*nind, 5]
	colnames(dataframe)[3 + nind] <- "Result"
	rownames(dataframe) <- 1:nres
	dataframe
}

Usage

variable <- op_baseGetData(db, "page identifier")
  • Result will be in a table format with columns: id, obs, ind1, ind2 ... indn, Result.

Manipulating data

Functions

DataframeToArray <- function(dataframe) {
	DimNames <- rep(vector("list", 1), ncol(dataframe) - 2)
	names(DimNames) <- c(colnames(dataframe)[2:(ncol(dataframe) - 1)])
	nind <- length(names(DimNames))
	indlengths <- 0
	for (i in 1:nind) {
		DimNames[[i]] <- levels(factor(dataframe[,1 + i]))
		indlengths[i] <- length(DimNames[[i]])
	}
	array <- rep(NA, prod(indlengths))
	dim(array) <- indlengths
	dimnames(array) <- DimNames
	array[as.matrix(dataframe[,c(1:nind + 1)])] <- dataframe[,ncol(dataframe)]
	array
}

Usage

variable2 <- DataframeToArray(variable1)
  • variable1 must be in similar format as the result when downloading.
    • first column (id) is ignored
  • variable1 <- function(variable1) is allowed in R

Other useful stuff

as.data.frame(as.table(array))
dataframe[is.na(dataframe[,ncol(dataframe)])==FALSE,]
  • First line returns an array from a data frame.
  • Second line returns rows without empty values.
dataframe[grep("location", dataframe$index, ignore.case = TRUE),]
  • Returns all rows of a data frame where column "index" value is "location".
dataframe[order(dataframe[,"col1"],dataframe[,"col2"], ... ,dataframe[,"coln"]),]
  • Returns dataframe ordered by col1, col2, ... , coln.
read.csv("table.csv", sep = ",")
  • Returns a data.frame from a .csv file, sep is the separator used in the file.

Uploading data

  • Tested and works.
    • Very efficient.
  • Probabilistic data supported, albeit with following weaknesses:
    • Varying numbers of iterations between cells not supported.
    • Probabilistic data must also follow a certain sorting order (indices first, obs last).
  • Uploading indices and locations relies on updating a dummy column when a duplicate is encountered.
    • Those dummy columns are "newest" and "roww" for indices and locations respectively, which are obsolete anyway.
    • Using a dummy column is probably faster and simpler than some other workaround.

Functions

op_baseWrite <- function(db, input, ident = NULL, name = NULL, unit = NULL, objtype_id = NULL, who = NULL, acttype = NULL) {
	
	#Coerce input into a data frame if it isn't one already; get rid of empty cells
	
	if (is.array(input)) dataframe <- as.data.frame(as.table(input)) else dataframe <- input
	rescol <- colnames(dataframe) == "Freq"
	if (length(rescol[rescol==TRUE]) >= 1) rescol <- "Freq" else {
		rescol <- colnames(dataframe) == "Result"
		if (length(rescol[rescol==TRUE]) >= 1) rescol <- "Result" else {
			rescol <- colnames(dataframe) == "result"
			if (length(rescol[rescol==TRUE]) >= 1) rescol <- "result"
		}
	}
	values <- dataframe[,rescol]
	cond <- (is.na(values) == FALSE)
	dataframe <- dataframe[cond,]
	
	#Add page to database (if it doesn't already exist)
	
	if (is.null(ident)==TRUE) if (interactive()) ident <- readline(paste("What is the identifier of this object?", 
		"\n", sep = "")) else stop("indentifier of object no given")
	wiki_name <- substring(ident, 1, 5)
	if (wiki_name=="Op_en") {wiki_id <- 1; page <- substring(ident, 6, nchar(ident))} else if (wiki_name=="Op_fi") {
		wiki_id <- 2; page <- substring(ident, 6, nchar(ident))} else {wiki_id <- 0; page <- 0}
	obj_id <- sqlQuery(db, paste('SELECT id FROM obj WHERE ident = "', ident, '"', sep = ''))[1,1]
	if (is.na(obj_id)==TRUE) {
		if (is.null(name)==TRUE) if (interactive()) name <- readline(paste("What is the name of this object?", 
			"\n", sep = "")) else stop("object name not given")
		if (is.null(unit)==TRUE) if (interactive()) unit <- readline(paste("What is the unit of this object?", 
			"\n", sep = "")) else stop("unit not given")
		if (is.null(objtype_id)==TRUE) if (interactive()) objtype_id <- readline(paste("What type of object is", 
			" this (id)?", paste(paste(sqlQuery(db, "SELECT id FROM objtype")[,1], sqlQuery(db, "SELECT objtype",
			" FROM objtype")[,1], sep = " - "), collapse = ", "), "\n", collapse = " ")) else {
			stop("object type not given")}
		sqlQuery(db, paste('INSERT INTO obj (ident, name, unit, objtype_id, page, wiki_id) VALUES ("', paste(ident, 
			name, unit, sep = '","'), '",', paste(objtype_id, page, wiki_id, sep = ','), ')', sep = ''))
		obj_id <- sqlQuery(db, paste('SELECT id FROM obj WHERE ident = "', ident, '"', sep = ''))[1,1]
	}
	
	#Write act and actobj
	
	if (is.null(who)==TRUE) if (interactive()) {who <- readline(paste("What is the name of the uploader?", "\n", sep = "")) 
		} else stop("uploader name not given")
	series_id <- sqlQuery(db, paste("SELECT series_id FROM actobj WHERE obj_id = ", obj_id, " ORDER BY series_id DESC LIMIT 1", 
		sep = ""))[1,1]
	if (is.na(series_id)==FALSE) {if (is.null(acttype)==TRUE) if (interactive()) {acttype <- readline(paste("What type of upload", 
		" is this? 4 - new data to replace any existing, 5 - new data to be appended to existing data (must have the same", 
		" indices).", "\n", sep = "")) 
		} else acctype <- 4 
		} else acctype <- 4
	if (acttype != 4 & acttype != 5) stop ("proper acttype not given")
	sqlQuery(db, paste('INSERT INTO act (acttype_id, who, comments) VALUES (', acttype, ',"', who, '","R upload")', sep = ''))
	act_id <- sqlQuery(db, "SELECT id FROM act ORDER BY id DESC LIMIT 1")[1,1]
	if (acttype == 4) series_id <- act_id
	sqlQuery(db, paste('INSERT INTO actobj (act_id, obj_id, series_id) VALUES (', paste(act_id, obj_id, series_id, sep = ','), 
		')', sep = ''))
	actobj_id <- sqlQuery(db, paste('SELECT id FROM actobj WHERE act_id = ', act_id, sep = ''))[1,1]
	
	#Write indexes
	
	ColNames <- colnames(dataframe[(colnames(dataframe) == "id") == FALSE])
	ColNames <- ColNames[(ColNames == "obs") == FALSE]
	ColNames <- ColNames[(ColNames == "Result") == FALSE]
	ColNames <- ColNames[(ColNames == "result") == FALSE]
	ColNames <- ColNames[(ColNames == "Freq") == FALSE]
	nind <- length(ColNames)
	DimNames <- rep(vector("list", 1), nind)
	names(DimNames) <- ColNames
	indlengths <- 0
	for (i in 1:nind) {
		DimNames[[i]] <- levels(factor(dataframe[, ColNames[i]]))
		indlengths[i] <- length(DimNames[[i]])
	}
	
	indQuery <- NA
	indQuery[1:nind*5 - 4] <- gsub(" ", "_", ColNames)
	indQuery[1:nind*5 - 3] <- '","'
	indQuery[1:nind*5 - 2] <- ColNames
	indQuery[1:nind*5 - 1] <- '",6'
	indQuery[1:(nind - 1)*5] <- '),("'
	sqlQuery(db, paste('INSERT INTO obj (ident, name, objtype_id) VALUES ("', paste(indQuery, collapse = ''), ')', 
		' ON DUPLICATE KEY UPDATE newest = 0', sep = ''))
	
	IndIds <- sqlQuery(db, paste('SELECT id, ident FROM obj WHERE ident IN("', paste(gsub(" ", "_", ColNames), 
		collapse = '","'), '")', sep = ''))
	DimIds <- DimNames
	DimN <- 1:nind
	names(DimN) <- gsub(" ", "_", ColNames)
	for (i in 1:nrow(IndIds)) {
		names(DimIds)[DimN[IndIds[i,2]]] <- IndIds[grep(gsub(" ", "_", ColNames[i]), IndIds$ident), 1]
	}
	
	#Write locations
	
	y <- 1
	LocNames <- as.data.frame(matrix(rep(NA, 2*sum(indlengths)), sum(indlengths), 2))
	for (i in 1:nind) {
		LocNames[y:(y + indlengths[i] - 1),1:2] <- matrix(c(rep(ColNames[i], indlengths[i]), 
			levels(factor(dataframe[,ColNames[i]]))), indlengths[i], 2)
		y <- y + indlengths[i]
	}
	LocNames[,1] <- names(DimIds)[DimN[LocNames[,1]]]
	
	nloc <- nrow(LocNames)
	locQuery <- NA
	locQuery[1:nloc*4 - 3] <- LocNames[,1]
	locQuery[1:nloc*4 - 2] <- ',"'
	locQuery[1:nloc*4 - 1] <- LocNames[,2]
	locQuery[1:(nloc - 1)*4] <- '"),('
	sqlQuery(db, paste('INSERT INTO loc (obj_id_i, location) VALUES (', paste(locQuery, collapse = ''), '")', 
		' ON DUPLICATE KEY UPDATE roww = 0', sep = ''))
	
	LocIds <- sqlQuery(db, paste('SELECT id, obj_id_i, location FROM loc WHERE location IN("', paste(LocNames[,2], 
		collapse = '","'), '") AND obj_id_i IN(', paste(names(DimIds), collapse = ','), ')', sep = ''))
	LocMap <- NA
	y <- 1
	for (i in 1:nind) {
		LocMap <- LocIds[grep(names(DimIds)[i], LocIds$obj_id_i), 1]
		names(LocMap) <- LocIds[grep(names(DimIds)[i], LocIds$obj_id_i), 3]
		DimIds[[i]] <- LocMap[DimNames[[i]]]
	}
	
	#Changing location names in table into ids
	
	for (i in 1:nind) {
		dataframe[,ColNames[i]] <- factor(dataframe[,ColNames[i]])
		levels(dataframe[,ColNames[i]]) <- DimIds[[i]]
	}
	
	#A hidden parameter for adjusting query packet sizes, the higher the faster, though crash becomes likelier
	
	maxrows <- 50000
	
	#Writing cell
	
	obscol <- colnames(dataframe) == "obs"
	if (length(obscol[obscol==TRUE]) >= 1) {
		obscol <- TRUE
		n <- length(levels(factor(dataframe[,"obs"])))} else {
		obscol <- FALSE
		n <- 1
	}
	ncell <- nrow(dataframe)/n
	cellQuery <- NA
	cellQuery[1:ncell*6-5] <- actobj_id
	cellQuery[1:ncell*6-4] <- ","
	if (n == 1) {
		cellQuery[1:ncell*6-3] <- dataframe[,rescol]} else {
		cellQuery[1:ncell*6-3] <- apply(matrix(dataframe[,rescol], n, ncell), 2, mean)
	}
	cellQuery[1:ncell*6-2] <- ","
	cellQuery[1:ncell*6-1] <- n
	cellQuery[1:(ncell-1)*6] <- "),("
	if (ncell >= maxrows) {
		for (i in 1:(ncell%/%maxrows)) {
			sqlQuery(db, paste('INSERT INTO cell (actobj_id, mean, n) VALUES (', paste(cellQuery[
				((i-1)*6*maxrows+1):(i*6*maxrows-1)], collapse = ''), ')', sep = ''))
		}
	}
	if (ncell%%maxrows != 0) sqlQuery(db, paste('INSERT INTO cell (actobj_id, mean, n) VALUES (', paste(cellQuery[(ncell%/%
		maxrows*6*maxrows+1):length(cellQuery)], collapse = ''), ')', sep = ''))
	
	#Writing res
	
	cell_id <- sqlQuery(db, paste("SELECT id FROM cell WHERE actobj_id = ", actobj_id, " ORDER BY ID", sep = ""))[,1]
	if (ncell != length(cell_id)) stop("Number of cells written does not match with expected value")
	resQuery <- NA
	resQuery[1:nrow(dataframe)*6-5] <- rep(cell_id, each = n)
	resQuery[1:nrow(dataframe)*6-4] <- ","
	if (n==1) resQuery[1:nrow(dataframe)*6-3] <- "0" else resQuery[1:nrow(dataframe)*6-3] <- dataframe[,"obs"]
	resQuery[1:nrow(dataframe)*6-2] <- ","
	resQuery[1:nrow(dataframe)*6-1] <- dataframe[,rescol]
	resQuery[1:(nrow(dataframe)-1)*6] <- "),("
	if (nrow(dataframe) >= maxrows) {
		for (i in 1:(nrow(dataframe)%/%maxrows)) {
			sqlQuery(db, paste('INSERT INTO res (cell_id, obs, result) VALUES (', paste(resQuery[((i-1)
				*4*maxrows+1):(i*4*maxrows-1)], collapse = ''), ')', sep = ''))
		}
	}
	if (nrow(dataframe)%%maxrows != 0) sqlQuery(db, paste('INSERT INTO res (cell_id, obs, result) VALUES (', paste(resQuery[
		(nrow(dataframe)%/%maxrows*4*maxrows+1):length(resQuery)], collapse = ''), ')', sep = ''))
	
	#Writing loccell
	
	locidmatrix <- rep(NA, nind*ncell)
	dim(locidmatrix) <- c(nind,ncell)
	for (i in 1:nind) {
		locidmatrix[i,] <- as.character(dataframe[1:ncell*n - n + 1,ColNames[i]])
	}
	loccellQuery <- rep(NA, 4*nind*ncell)
	dim(loccellQuery) <- c(4*nind, ncell)
	loccellQuery[1:nind*4-3, 1:ncell] <- rep(cell_id, each = nind)
	loccellQuery[1:nind*4-2, 1:ncell] <- ","
	loccellQuery[1:nind*4-1, 1:ncell] <- locidmatrix
	loccellQuery[1:nind*4, 1:ncell] <- "),("
	loccellQuery[nind*4, ncell] <- ""
	if (ncell >= maxrows) {
		for (i in 1:(ncell%/%maxrows)) {
			loccellQuery[nind*4, i*maxrows] <- ""
			sqlQuery(db, paste('INSERT INTO loccell (cell_id, loc_id) VALUES (', paste(loccellQuery[,
				((i-1)*maxrows+1):(i*maxrows)], collapse = ''), ')', sep = ''))
		}
	}
	if (ncell%%maxrows != 0) sqlQuery(db, paste('INSERT INTO loccell (cell_id, loc_id) VALUES (', paste(loccellQuery[,
		(ncell%/%maxrows*maxrows+1):ncell], collapse = ''), ')', sep = ''))
}

Usage

op_baseWrite(db, input, ident = NULL, name = NULL, unit = NULL, objtype_id = NULL, who = NULL, acttype = NULL)
  • Db and input must be defined, the rest if not defined is prompted for by the function as needed.
Restrictions
  • Input may be given in either array or data.frame form.
    • Input in data.frame form must contain a "Freq", "Result" or "result" column, this is where the numerical value is read.
    • Probabilistic input must contain a dimension (in case of array) or a column (in case of data.frame) named "obs". Also: all cells must have values for each "obs" value. And the sorting order must be: indices first, obs last; for arrays this means that the first index must be "obs".
Retrieved from "https://en.opasnet.org/index.php?title=Opasnet_Base_Connection_for_R&oldid=17263"