data analysis

Useful R techniques 2

Kazu Nozue / 2021-03-19
Key words are key, value, inner_join(), left_join(), right_join(), full_join, semi_join(), and anti_join(). Read a book written by Hadley Wickham and Garrett Grolemund.
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() %>%…
native-plant

Native plant project v2 March-April 2020

Kazu Nozue / 2020-04-18
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March 21, 2020 […] This year Lupins and California poppies bloomed earlier than usual due to warm winter. During shelter-in place order many sidewalkers enjoyed our front yard. Some of them took pictures of plants, and others took California poppy plants and planted them to their front yards.…
native-plant

Native plant garden project v2.1

Kazu Nozue / 2019-12-30
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Toward this rainy season I started upgrading my native plant gardens. Main goals of this project (v2) are […] Fig.1 Survived lawn. […] Fig2. Replacing lawn to native plants. […] In the first project I expected spontanious disappearance of lawns from fronyard by no watering…