zscore {quickcode}

Calculates Z-Scores of a distribution

Description

Calculates Z-Scores based on data

Usage

zscore(.data, round, na.rm = TRUE)

zscoreGrowthCurve(Xi, Mi, Si, Li = !0)

Arguments

.data

data object

round

round output to how many decimal place description

na.rm

remove NA values before calculating z-scores

Xi

physical measurement (e.g. weight, length, head circumference, stature or calculated BMI value)

Mi

values from the table (see reference) corresponding to the age in months of the child

Si

values from the table (see reference) corresponding to the age in months of the child

Li

values from the table (see reference) corresponding to the age in months of the child

Value

zscore calculated based on data object or parameters

References

CDC growth chart Z score calculation: https://www.cdc.gov/growthcharts/cdc-data-files.htm

Examples

# Capture z-score from the following distribution x
x = c(6, 7, 7, 12, 13, 13, 15, 16, 19, 22)
z_scores = zscore(x, round = 2) # limit to 2 decimal place
z_scores = zscore(x) # no decimal place limit

df = data.frame(val = x, zscore = z_scores)
head(df)
#EXAMPLE for zscore based on CDC growth chart

# Calculate the zscore for a patient weighing 50kg
Li=-0.1600954
Mi=9.476500305
Si=0.11218624
Xi=50
zscoreGrowthCurve(Xi,Mi,Si,Li)