Skip to contents

Get program specific limits

Source: R/getProgramLimit.R
getProgramLimit.Rd

Get the (most restrictive) limit that SPSS and/or Stata imposes on a specific aspect of a dataset.

Usage

getProgramLimit(
  program = c("SPSS", "Stata", "Stata 19/BE", "Stata 19/MP"),
  component = c("varNames", "varLabels", "valLabels", "stringvars", "nrows", "ncols")
)

Arguments

program

Character vector of the programs/program version that should be considered.

component

Single string. Which limits should be returned?

Value

A list of two elements: value (numeric size of the limit) and unit ("char", "byte", or "generic").

Details

SPSS and Stata impose different limits to different components of their datasets, e.g., on the length of variable names. For details and a list of relevant limits, see program_limits. Additionally, limits may vary between software versions. This primarily applies to Stata's product tiers, but also for (very) old SPSS versions.

For program, "SPSS" and "Stata" imply SPSS 30 and Stata 19/SE, respectively, as these are the most relevant version among the ones implemented here.

If more than one program/version name is given in program, the most restrictive limit will be returned.

See also

Other dataset compliance checks: checkIntOverflow(), checkLabeledFractionals()

Examples

# Show all implemented limits
program_limits
#>     component     program         value    unit
#> 1    varNames        SPSS            64    byte
#> 2    varNames       Stata            32    char
#> 3    varNames Stata 19/BE            32    char
#> 4    varNames Stata 19/MP            32    byte
#> 5   varLabels        SPSS           256 generic
#> 6   varLabels       Stata            80 generic
#> 7   varLabels Stata 19/BE            80    char
#> 8   varLabels Stata 19/MP            80    char
#> 9   valLabels        SPSS           120    char
#> 10  valLabels       Stata         30000    byte
#> 11  valLabels Stata 19/BE         30000 generic
#> 12  valLabels Stata 19/MP         30000 generic
#> 13 stringvars        SPSS         32767    char
#> 14 stringvars       Stata       2000000    char
#> 15 stringvars Stata 19/BE       2000000    char
#> 16 stringvars Stata 19/MP       2000000    byte
#> 17      nrows        SPSS    2147483647 generic
#> 18      nrows       Stata    2147483619 generic
#> 19      nrows Stata 19/BE    2147483619    char
#> 20      nrows Stata 19/MP 1099511627775    char
#> 21      ncols        SPSS    2147483647    char
#> 22      ncols       Stata         32767    byte
#> 23      ncols Stata 19/BE          2048 generic
#> 24      ncols Stata 19/MP        120000 generic

# Get the specific limit on variable name lengths under SPSS
getProgramLimit("SPSS", "varNames")
#> $value
#> [1] 64
#> 
#> $unit
#> [1] "byte"
#> 

# Get the variable name length limit a dataset has to adhere to to be compatible with
#  both SPSS and Stata 19/SE
getProgramLimit(c("Stata", "SPSS"), "varNames")
#> $value
#> [1] 32
#> 
#> $unit
#> [1] "char"
#>