您好，
我是java的新手..
使用正则表达式我需要从下面的文本中获取值....
`trace` -
structure(list("a" = structure(c(0.748701,0.243802,0.227221,0.752231,0.261118,0.263976,1.19737,0.22047,0.222584,0.835411), .Dim = structure(c(3L,20000L,1L), .Names = c("","iteration","chain"))),
"b" = structure(c(1.4019,0.486955,-0.127144,0.642778,0.379787,-0.105249,1.0063,0.613083,-0.165703,0.695775), .Dim = structure(c(3L,20000L,1L), .Names = c("","iteration","chain")))),
.Names = c("a", "b"))
现在我想得到“a”=结构的值（c（.....）和“b”=结构（c（.....）我想要结构之间的值（c（。 ....）