I'm struggling to customize my barplot, especially to make it less wide.. Because I only have to plot one bar, I don't know how to make it thinner…
This is my code so far:
plot <- barplot(meand, sub = "Mean dprime with SEM", ylab = "mean d'", ylim = c(0,0.2), axes = T, width = c(0.25, 0.3))
arrows(plot, (meand-sem), plot, y1= (meand+sem), code = 3, angle = 90, xpd = T)