EV

Needs more cargo space in electric vehicles!

Kazu Nozue / 2019-03-30

Electric vehicle (EV) became popular in California. Recently I can find more than one Tesla car during my daily commute. There are a couple of advantages of EV compared with gas powered vehicles; (1) higher cost efficiency (higher MPGe1), (2) lower maintainance cost, and (3) tax incentives and…

data analysis

List to data frame in R tidyverse

Kazu Nozue / 2018-12-20

Converting list object to a data frame object is common in R. There are many ways and here is another way using tidyverse packages. […] This is an efficient implementation of the common pattern of do.call(rbind, dfs) or do.call(cbind, dfs) for binding many data frames into one (cited from…