psthr.RdRounds numeric values and formats as "value (lower, upper)" with intelligent formatting:
Values with |x| < 0.01 or |x| > 1000: scientific notation
Other values: standard rounding with trailing zeros
psthr(x, y = 2, compact = FALSE)
psthr0(x, digits = 2)Character string with first element followed by remaining elements in parentheses
psthr0(): Compact version without spaces (for plots)