For each group, computes the mean x/y position and a rectangular 95%
confidence interval using t(df = n-1, 0.975) * SE on each axis
independently. This matches the CI convention used by rENA / Web ENA.
Usage
group_summary(pts, x_col, y_col, group_col)
Arguments
- pts
A data.frame with at least the columns named by x_col,
y_col, and group_col.
- x_col
Name of the x-coordinate column.
- y_col
Name of the y-coordinate column.
- group_col
Name of the grouping column.
Value
A data.frame with columns group, x, y, x.low, x.high,
y.low, y.high.