我有一个数据帧,我使用xtable 将其放入一个sweave文档,但是我的一个列名很长,我想将它分成两行以节省空间
calqc_table<-structure(list(RUNID = c(1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L), ANALYTEINDEX = c(1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L), ID = structure(1:11, .Label = c("Cal A", "Cal B", "Cal C",
"Cal D", "Cal E", "Cal F", "Cal G", "Cal H", "Cal High", "Cal Low",
"Cal Mid"), class = "factor"), mean_conc = c(200.619459644855,
158.264703128903, 102.469121407733, 50.3551544728544, 9.88296440865076,
4.41727762501703, 2.53494715706024, 1.00602831741361, 199.065054555735,
2.48063347296935, 50.1499780776199), sd_conc = c(2.3275711264554,
NA, NA, NA, NA, …