Just some quick experiments with ggplot2 + magrittr to plot prices differently than the traditional ways. We will get daily data on the S&P 500 from FRED using getSymbols
and then push it through a magrittr
pipe to various alternative plots.
A couple notes for those who might be interested in magrittr. If you want to ->
or <-
but do not want the pipe fun to end, then you can use assign
like this.
mydata
%T>% assign( x="sp_df", value = ., envir = .GlobalEnv ) %>%
Also for those who want to use the special +
inside a pipe or just want your +
on a different line for tidy code and easy commenting, then you can do like this.
ggplot( ) %>%
+ geom_point()
Let me know if I have it all wrong, and now some plots as promised.
require(ggplot2)
require(dplyr)
require(magrittr)
require(quantmod)
getSymbols("SP500", src="FRED", from = "1900-01-01", auto.assign=F) %>%
na.omit %>%
data.frame(
date = index(.)
) %T>% assign( x="sp_df", value = ., envir = .GlobalEnv ) %>%
mutate( year = format(date,"%Y") ) %>%
ggplot( aes( x=SP500, group = year ) ) %>%
+ geom_density() %>%
+ facet_wrap(~year,nrow=1) %>%
+ coord_flip() %>%
+ theme_bw() %>%
+ theme(
axis.line=element_blank()
,axis.text.x=element_blank()
,axis.title.x=element_blank()
)
sp_df %>%
ggplot( aes( x = format(date,"%Y"), y = SP500 ) ) %T>%
( function(x){ print( x + geom_line() ) } ) %T>%
( function(x){ print( x + geom_point() ) } ) %T>%
( function(x){ print( x + geom_hex( bins = 20 ) ) } ) %>%
+ geom_violin()
If you are interested in seeing the source Rmd, then it is here. One more note is this is copied/pasted with only minor changes from Rstudio knitted Rmd.
Is the T meant to be in "%T>%"? I have never seen that before and your code won't run on my machine either way (with or without the T)
ReplyDeleteThe error I get it "Error in index(.) : object '.' not found"
ReplyDeleteyou'll need to get the newest magrittr with
ReplyDeletedevtools::install_github("smbache/magrittr")
If you have dplyr, you'll need to require or library(magrittr) last to make sure %>% is from magrittr. Also, it might be helfpul if you read the Readme.md from magrittr on its github page https://github.com/smbache/magrittr.
Bizarre, %T>% still doesn't work even after updating the package but I can get the chart to work without it, thanks!
ReplyDelete