原来的数据格式
希望的数据格式


请问如何用gather函数进行宽变长的变换，谢谢
数据：
structure(list(conc = c(0, 0.05), HMP = c(71.014, 71.5105), hmpSD = c(2.16233,
0.44194), PP = c(71.014, 72.975), PPSD = c(2.16233, 1.20491),
    TPP = c(71.014, 72.43), TPPSD = c(2.16233, 1.24305)), .Names = c("conc",
"HMP", "hmpSD", "PP", "PPSD", "TPP", "TPPSD"), row.names = c(NA,
-2L), class = c("tbl_df", "tbl", "data.frame"))
或
"conc" "HMP" "hmpSD" "PP" "PPSD" "TPP" "TPPSD"
0 71.014 2.16233 71.014 2.16233 71.014 2.16233
0.05 71.5105 0.44194 72.975 1.20491 72.43 1.24305

或下载txt