[빅분기 실기] T1-25 문자열 슬라이싱

데이터에서 f4가 E로 시작하면서 부산에 살고 20대인 사람은 몇 명일까요? https://www.kaggle.com/code/yimstar9/t1-27-str-slicing/edit t1-27-str_slicing Explore and run machine learning code with Kaggle Notebooks | Using data from Big Data Certification KR www.kaggle.com library(dplyr) df <- read.csv("..

/input/bigdatacertificationkr/basic1.csv") df_E<-df[grep("^E",df$f4),] ans<-df_E%>%filter(city=='부산'&(age)%/%10==2)%>%nrow() print(ans)...