Arith-methods {PivotalR} | R Documentation |
db.obj
objectsThese binary operators perform arithmetic on
db.obj
objects
## S4 method for signature 'db.obj,db.obj' e1 + e2 ## S4 method for signature 'db.obj,db.obj' e1 - e2 ## S4 method for signature 'db.obj,ANY' e1 - e2 ## S4 method for signature 'db.obj,db.obj' e1 * e2 ## S4 method for signature 'db.obj,db.obj' e1 / e2 ## S4 method for signature 'db.obj,db.obj' e1 %% e2 ## S4 method for signature 'db.obj,db.obj' e1 %/% e2 ## S4 method for signature 'db.obj,db.obj' e1 ^ e2 ## S4 method for signature 'numeric,db.obj' e1 + e2 ## S4 method for signature 'character,db.obj' e1 + e2 ## S4 method for signature 'numeric,db.obj' e1 - e2 ## S4 method for signature 'character,db.obj' e1 - e2 ## S4 method for signature 'numeric,db.obj' e1 * e2 ## S4 method for signature 'numeric,db.obj' e1 / e2 ## S4 method for signature 'numeric,db.obj' e1 %% e2 ## S4 method for signature 'numeric,db.obj' e1 %/% e2 ## S4 method for signature 'numeric,db.obj' e1 ^ e2 ## S4 method for signature 'db.obj,numeric' e1 + e2 ## S4 method for signature 'db.obj,character' e1 + e2 ## S4 method for signature 'db.obj,numeric' e1 - e2 ## S4 method for signature 'db.obj,character' e1 - e2 ## S4 method for signature 'db.obj,numeric' e1 * e2 ## S4 method for signature 'db.obj,numeric' e1 / e2 ## S4 method for signature 'db.obj,numeric' e1 %% e2 ## S4 method for signature 'db.obj,numeric' e1 %/% e2 ## S4 method for signature 'db.obj,numeric' e1 ^ e2
e1, e2 |
numeric or |
db.Rquery
object, which contains the SQL query
that computes the arithmetic operations.
A meaningful expression is generated only when the
.col.data_type
is "numeric", otherwise a "NULL" value is
generated.
"-"
and "+"
support computing the arithmetic computations between dates, timestamps, times etc.
Author: Predictive Analytics Team at Pivotal Inc.
Maintainer: Frank McQuillan, Pivotal Inc. fmcquillan@pivotal.io
db.Rquery
contains a SQL query that does the
operations.
## Not run: ## get the help for a method ## help("+,db.obj,db.obj-method") ## set up the database connection ## Assume that .port is port number and .dbname is the database name cid <- db.connect(port = .port, dbname = .dbname, verbose = FALSE) ## ---------------------------------------------------------------------- ## create a table from the example data.frame "abalone" delete("abalone", conn.id = cid) x <- as.db.data.frame(abalone, "abalone", conn.id = cid, verbose = FALSE) x$rings <- (x$rings + 2.3) * 3 # change the values x$area <- x$length * x$height # add a new column lk(x$area, 10) # view the actual values computed in database fit <- madlib.lm(rings ~ area, data = x) ## ---------------------------------------------------------------------- db.disconnect(cid, verbose = FALSE) ## End(Not run)