小結(jié)（1）
上述9種方法（10個(gè)月份）轉(zhuǎn)換“月和季的英文名稱”所花時(shí)間結(jié)果整理如下：
type fun mean
1 Month for_if 3.252180e-01
2 Month for_if_else 3.054237e-01
3 Month for_ifelse 5.160331e-01
4 Month for_switch 9.307517e-02
5 Month which 3.935091e-01
6 Month str_replace_all 3.372382e+00
7 Month join 2.467942e+00
8 Month ddply.parallel 7.441605e+01
9 Month ddply 9.836038e+00
10 result for_if 9.601528e-01
11 result for_if_else 8.065160e-01
12 result for_ifelse 1.007159e+00
13 result for_switch 7.728128e-01
14 result which 8.868605e-01
15 result str_replace_all 4.431068e+00
16 result join 2.523177e+00
17 result ddply.parallel 1.939038e+01
18 result ddply 1.924074e+01
19 Season for_if 3.223124e-01
20 Season for_if_else 2.256315e-01
21 Season for_ifelse 3.162032e-01
22 Season for_switch 8.748225e-02
23 Season which 1.571115e-01
24 Season str_replace_all 8.145484e+01
25 Season join 3.546876e+00
26 Season ddply.parallel 7.299754e+01
27 Season ddply 9.877732e+00
#根據(jù)上述數(shù)據(jù)生成圖
data<-read.csv("/home/xh/300G/筆記/R/Book1.csv",)
ggplot(data,aes(fun,mean,fill=type))+
geom_col()+
facet_wrap(~type)+
theme(axis.text.x = element_text(angle=90),legend.position="none")
coord_flip()
Rplot.png
從上圖可以看出，tidyverse包中的這幾個(gè)函數(shù)（ddply*,str_repalce_all, join）花費(fèi)的時(shí)間都明顯長(zhǎng)，而R自帶的基本函數(shù)花費(fèi)時(shí)間較短。
說(shuō)明
本結(jié)果是基于隨機(jī)的10個(gè)月數(shù)據(jù)統(tǒng)計(jì)的結(jié)果，其結(jié)果具有很大的隨機(jī)性
本結(jié)果執(zhí)行的平臺(tái)信息為：
more /proc/cpuinfo | grep "model name" #CPU
grep MemTotal /proc/meminfo #內(nèi)存
lsb_release -a #操作系統(tǒng)
model name : Intel(R) Core(TM) i3-2328M CPU @ 2.20GHz
model name : Intel(R) Core(TM) i3-2328M CPU @ 2.20GHz
model name : Intel(R) Core(TM) i3-2328M CPU @ 2.20GHz
model name : Intel(R) Core(TM) i3-2328M CPU @ 2.20GHz
MemTotal: 10043876 kB
LSB Version: n/a
Distributor ID: ManjaroLinux
Description: Manjaro Linux
Release: 18.1.5
Codename: Juhraya
（未完！待續(xù)……）
