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Celeration (trend) line for a single-case phase

Source: R/sced-band.R
scedCelerationLine.Rd

Fits a trend line to one phase, either by the White & Haring split-middle method (the standard SCED hand method) or by ordinary least squares.

Usage

scedCelerationLine(
  value,
  time = NULL,
  method = c("split_middle", "ols"),
  ratio_period = 7
)

Arguments

value

Numeric phase observations, or pass time/value explicitly.

time

Optional numeric session index (default seq_along(value)).

method

"split_middle" (default) or "ols".

ratio_period

Sessions spanned by the reported celeration ratio (default 7, a weekly ratio for daily data).

Value

An AnalysisResult (type = "sced_celeration") whose estimate is the slope (celeration per session), with result$intercept, result$fitted, result$bounce (the ratio of the largest positive to the largest negative residual magnitude) and result$celeration_ratio (the multiplicative change over ratio_period sessions).

References

White OR, Haring NG (1980). Exceptional Teaching, 2nd ed. Columbus, OH: Merrill.

See also

scedTwoSDBand(), scedABAB()

Examples

scedCelerationLine(c(4, 6, 5, 8, 7, 10, 9))
#> <AnalysisResult> sced_celeration 
#>   estimate: 1 
#>   method: celeration (split_middle) 
#>   fields: estimate, ci_lower, ci_upper, intercept, fitted, residuals, bounce, celeration_ratio, method, ratio_period 
#>   provenance: 1 entr(ies)