"ir_curve".
"plot"(x, ylim = c(), xlim = c(), lwd = 2, type = "l",
xlab = "Maturity (years)", ylab = "Zero-coupon yields (in percent)",
col = "steelblue", lty = 1, ...)"ir_curve".plot.default.plot.default.par.plot.default.plot.default.plot.default.par.par.