scidb (version 1.1-2)

subset-methods: Methods for Function subset in Package scidb

Description

SciDB filter operations.

Usage

## S3 method for class 'scidb':
subset(X,subset,eval)
## S3 method for class 'scidbdf':
subset(X,subset,eval)

Arguments

X

A scidb or scidbdf object.

subset

A character string representing a SciDB filter expression.

eval

(Optional) If true, execute the query. Otherwise defer evaluation.

Value

• A scidb, scidbdf reference object.

Details

Perform a SciDB filter operation on a SciDB array. The subset filter expression argument can be any valid SciDB filter operation.

Examples

# Create a copy of the iris data frame in a 1-d SciDB array named "iris."
# Note that SciDB attribute names will be changed to conform to SciDB
# naming convention.
x <- as.scidb(iris,name="iris")

y <- subset(x,"Species='setosa'")