[問題] 正則表達式-"\\."
[軟體熟悉度]:
魯肉腳
[問題敘述]:
coursera某篇在教strsplit的section：
>names(cameraData)
[1] "address" "direction" "street" "crossStreet" "intersection" "Location.1"
該篇教學內容主要目的是要透過strsplit將"Location.1"經由"."分離，因此要設正則
表達式：
splitNames = strsplit(names(cameraData), "\\.")
我不懂的地方在於，為何"\\"是兩個而不是一個，當我只用一個"\"的時候，會出現以下
警告：
>strsplit(names(cameraData), "\.")
錯誤: 在起始 ""\." 的字串中 '\.' 是無法辨識的跳脫字元
是否有好心大大可以解惑？謝謝
[關鍵字]:
regular expression
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