data analysis

Heat pump water heater

Kazu Nozue / 2021-01-07
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library(tidyverse) library(lubridate) library(scales) Buring gas produce CO2. Reducing gas usage is critical to reduce CO2 production from our house. Here is the history of our gas usage of my house since 2012 November. # reading data gasdata <-…
data analysis

Heart rate data analysis 1

Kazu Nozue / 2021-01-01
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An Apple watch measures heart rate and you can download its raw data. Here I plotted my daughter’s data in this year. Please see Taras Kaduk’s blog ( https://taraskaduk.com/2019/03/23/apple-health/) for details. library(XML) library(tidyverse) library(lubridate) library(scales) library(ggthemes)…
data analysis

Useful R techniques 1

Kazu Nozue / 2020-12-24
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mtcars %>% rownames_to_column() %>% filter(str_detect(rowname,"Mazda")) ## rowname mpg cyl disp hp drat wt qsec vs am gear carb ## 1 Mazda RX4 21 6 160 110 3.9 2.620 16.46 0 1 4 4 ## 2 Mazda RX4 Wag 21 6 160 110 3.9 2.875 17.02 0 1 4 4 mtcars %>% rownames_to_column() %>%…
data analysis

Evaluation of team rank prediction in sports league by sum of residuals

Kazu Nozue / 2019-12-29
J1_2019_pred_results <- read_csv(file.path("/Volumes","data_personal","Kazu_blog14","resources","日刊スポーツ・サッカー担当の19年J1順位予想と結果.csv")) ## ## ── Column specification ──────────────────────────────────────────────────────── ## cols( ## rank =…
EV

Needs more cargo space in electric vehicles!

Kazu Nozue / 2019-03-30
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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

Slide presentation in R with xarigan package

Kazu Nozue / 2019-01-30
As an audience of a seminar, it is difficut to follow presentation when screen is scrolling down that happens in regular websites. Esay convertion from RMarkdown to slides are described in Rmarkdown book. To make slides for presentation of your RMarkdown documents, xarigan package developed by Yihui…