Mac使用R出现 vector memory exhausted (limit reached?)问

大家好，我对两列179万行的数据进行如下运算：fviz_nbclust(df, kmeans, method = "wss") + geom_vline(xintercept = 4, linetype = 2)，得到反馈Error: vector memory exhausted (limit reached?)。请问如何解决呢？

Mac版本：16 GB 1600 MHz DDR3，

2.3 GHz Intel Core i7

R 版本：

R version 3.6.1 (2019-07-05) -- "Action of the Toes"

Copyright (C) 2019 The R Foundation for Statistical Computing

Platform: x86_64-apple-darwin15.6.0 (64-bit)

谢谢！