利用gganimate可视化R-Ladies发展情况

简介

这篇博客主要基于d4tagirl（https://d4tagirl.com/2017/05/how-to-plot-animated-maps-with-gganimate），稍微有所修改。

数据加载

library(pacman)

p_load(tidyverse, gganomate, maps, ggthemes)

rladies <- read_csv(url("https://raw.githubusercontent.com/d4tagirl/R-Ladies-growth-maps/master/rladies.csv"))%>%

select(-1)

head(rladies)

## # A tibble: 6 x 7

##   screen_name     location     created_at followers age_days     lon   lat

##   <chr>           <chr>        <date>         <int>    <dbl>   <dbl> <dbl>

## 1 RLadiesSF       San Francis~ 2012-10-15       916     1673 -122     37.8

## 2 RLadiesNYC      New York     2016-09-01       309      256 - 74.0   40.7

## 3 RLadiesIstanbul <U+0130>stanbul, T~ 2016-09-06       436      251   29.0   41.0

## 4 RLadiesBCN      Barcelona, ~ 2016-10-11       377      216    2.17  41.4

## 5 RLadiesColumbus Columbus, OH 2016-10-04       179      223 - 83.0   40.0

## 6 RLadiesBoston   Boston, MA   2016-09-06       259      251 - 71.1   42.4

可视化

主要是根据地理位置信息映射到地图上

fig.height=18}

ggplot()+

borders("world", color="gray85", fill="grey80")+

geom_point(data = rladies, aes(lon, lat, size=followers), color="purple", alpha=0.5)+

scale_size_continuous(range = c(8, 24), breaks = c(250, 500, 750, 1000))+

labs(size="Followers", title="                                             The development of R-Ladies’ Twitter accounts",x=NULL,y=NULL)+

theme(text = element_text(family = "Times New Roman", color = "#EEEEEE"),

plot.title = element_text(size=40,color = "#f9ba00"),

plot.subtitle = element_text(size=14),

axis.ticks = element_blank(),

axis.text = element_blank(),

panel.grid = element_blank(),

panel.background = element_rect(fill="#333333"),

plot.background = element_rect(fill = "#333333"),

legend.position = c(0.18,0.36),

legend.background = element_blank(),

legend.key = element_blank(),

legend.text = element_text(size = 28),

legend.title = element_text(size=28, color = "#f9ba00"))+

annotate(geom = "text",

label="Made by Logos ytlogos.github.io\nOriginally from d4tagirl https://d4tagirl.com",

x=70, y=-55, size=10, family="Helvetica Black", color="#f9ba00", hjust="left")

动画展示

为了利用gganimate进行动态展示，需要构建一个映射变量：时间。同时为了使得可视化开始和结尾呈现的是空白，又构建了两个空白图层   

ghost_points_ini <- tibble(created_at=as.Date("2011-09-01"), followers=0, lon=0, lat=0)

ghost_points_fin <- tibble(created_at=seq(as.Date("2017-05-16"), as.Date("2017-05-30"),by="days"), followers=0, lon=0,lat=0)

添加frame映射

map <- ggplot()+

borders("world", color="gray85", fill="grey80")+

geom_point(data = rladies, aes(lon, lat, size=followers, frame=created_at, cumulative=TRUE), color="purple", alpha=0.5)+

scale_size_continuous(range = c(4, 16), breaks = c(250, 500, 750, 1000))+

geom_point(data = ghost_points_ini, aes(lon, lat, size=followers, frame=created_at, cumulative=TRUE), alpha=0)+

geom_point(data = ghost_points_fin, aes(lon, lat, size=followers, frame=created_at, cumulative=TRUE), alpha=0)+

labs(size="Followers", title="The development of R-Ladies’ Twitter accounts",x=NULL,y=NULL)+

theme(text = element_text(family = "Times New Roman", color = "#EEEEEE"),

plot.title = element_text(size=28, color = "#f9ba00"),

plot.subtitle = element_text(size=14),

axis.ticks = element_blank(),

axis.text = element_blank(),

panel.grid = element_blank(),

panel.background = element_rect(fill="#333333"),

plot.background = element_rect(fill = "#333333"),

legend.position = c(0.18,0.36),

legend.background = element_blank(),

legend.key = element_blank(),

legend.text = element_text(size = 18),

legend.title = element_text(size=24, color = "#f9ba00"))+

annotate(geom = "text",

label="Made by Logos ytlogos.github.io\nOriginally from d4tagirl https://d4tagirl.com",

x=70, y=-55, size=6, family="Helvetica Black", color="#f9ba00", hjust="left")

animation::ani.options(interval=0.15, ani.width=1500, ani.height=800, units="in")

gganimate::gganimate(map, filename = "d4tagirlmap.gif")

SessionInfo

sessionInfo()

## R version 3.4.3 (2017-11-30)

## Platform: x86_64-w64-mingw32/x64 (64-bit)

## Running under: Windows 10 x64 (build 16299)

##

## Matrix products: default

##

## locale:

## [1] LC_COLLATE=Chinese (Simplified)_China.936

## [2] LC_CTYPE=Chinese (Simplified)_China.936

## [3] LC_MONETARY=Chinese (Simplified)_China.936

## [4] LC_NUMERIC=C

## [5] LC_TIME=Chinese (Simplified)_China.936

##

## attached base packages:

## [1] stats     graphics  grDevices utils     datasets  methods   base

##

## other attached packages:

##  [1] ggthemes_3.4.0       maps_3.2.0           BiocInstaller_1.28.0

##  [4] forcats_0.2.0        stringr_1.2.0        dplyr_0.7.4

##  [7] purrr_0.2.4          readr_1.1.1          tidyr_0.8.0

## [10] tibble_1.4.2         ggplot2_2.2.1.9000   tidyverse_1.2.1

## [13] pacman_0.4.6

##

## loaded via a namespace (and not attached):

##  [1] reshape2_1.4.3    haven_1.1.1       lattice_0.20-35

##  [4] colorspace_1.3-2  htmltools_0.3.6   yaml_2.1.16

##  [7] utf8_1.1.3        rlang_0.1.6       pillar_1.1.0

## [10] foreign_0.8-69    glue_1.2.0        modelr_0.1.1

## [13] readxl_1.0.0      bindrcpp_0.2      bindr_0.1

## [16] plyr_1.8.4        munsell_0.4.3     gtable_0.2.0

## [19] cellranger_1.1.0  rvest_0.3.2       psych_1.7.8

## [22] evaluate_0.10.1   labeling_0.3      knitr_1.19

## [25] parallel_3.4.3    broom_0.4.3       Rcpp_0.12.15

## [28] scales_0.5.0.9000 backports_1.1.2   jsonlite_1.5

## [31] mnormt_1.5-5      hms_0.4.1         digest_0.6.15

## [34] stringi_1.1.6     grid_3.4.3        rprojroot_1.3-2

## [37] cli_1.0.0         tools_3.4.3       magrittr_1.5

## [40] lazyeval_0.2.1    crayon_1.3.4      pkgconfig_2.0.1

## [43] xml2_1.2.0        lubridate_1.7.1   assertthat_0.2.0

## [46] rmarkdown_1.8     httr_1.3.1        rstudioapi_0.7

## [49] R6_2.2.2          nlme_3.1-131      compiler_3.4.3