geom_histogram( alpha = 1, color="black")+ title='Total Length at EarthwormSites \\n vs Total Length at Earthworm-Free Sites', x='Snout-Vent Length (mm)')+
theme我只试过玩aes(co
16 17 187 8 9 10 11 12第一行中的计算-一次只考虑两个矩阵中的四个元素(0表示填充):
(1-8)+(2-9)+(3-10)+(4-(2-9)+(3-10)+(4-11)+(5-12): This replaces 2 in initial matrix.(3-10)+(4-11)+(5-12)+(6-0): This replaces 3 in initial matrix.(4-11)+(5-12)+(6-0)+(0-0): This replac