我试图在R中对曲线下的区域进行着色,我不能完全正确地处理它,我也不确定为什么。曲线由下式定义
# Define the Mean and Stdev
mean=1152
sd=84
# Create x and y to be plotted
# x is a sequence of numbers shifted to the mean with the width of sd.
# The sequence x includes enough values to show +/-3.5 standard deviations in the data set.
# y is a nor