This document provides some suggestions and resources for environmental engineers using R. This information is based on my own personal experience of learning and using R.
Jeff Walker walkerjeffd
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| # Raspberry Pi Set Up Shell Script | |
| # By Jeff Walker | |
| # I created this to make it easier to re-install/re-configure my pi in case I need to start from scratch. | |
| # Assumes Occidentalis v0.2 is being used. | |
| # Run an update | |
| # sudo apt-get update | |
| # Adafruit WebIDE |
walkerjeffd
/ r-for-engineers.md
Last active
August 29, 2015 14:02
R Programming for Environmental Engineers
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| DATETIME | RTC_TEMP_C | TEMP_C | HUMIDITY_PCT | BATTERY_LEVEL | |
|---|---|---|---|---|---|
| 2014-07-15 21:05:29 | 25.50 | 25.70 | 70.40 | 5.15 | |
| 2014-07-15 21:05:35 | 25.50 | 25.70 | 70.30 | 5.14 | |
| 2014-07-15 21:05:40 | 25.50 | 25.70 | 70.30 | 5.14 | |
| 2014-07-15 21:05:45 | 25.50 | 25.70 | 70.30 | 5.14 | |
| 2014-07-15 21:05:51 | 25.50 | 25.70 | 70.30 | 5.14 | |
| 2014-07-15 21:05:56 | 25.50 | 25.60 | 70.19 | 5.14 | |
| 2014-07-15 21:06:02 | 25.50 | 25.60 | 70.30 | 5.14 | |
| 2014-07-15 21:06:07 | 25.50 | 25.70 | 70.30 | 5.14 | |
| 2014-07-15 21:06:12 | 25.50 | 25.60 | 70.30 | 5.14 |
First try using http://blockbuilder.org, pretty sweet!
From Wikipedia:
Epicyclic gearing or planetary gearing is a gear system consisting of one or more outer gears, or planet gears, revolving about a central, or sun gear. … Epicyclic gearing systems also incorporate the use of an outer ring gear or annulus, which meshes with the planet gears.
Use the menu in the top-left to change the frame of reference, fixing the specified gear in-place.
forked from mbostock's block: Epicyclic Gearing
Used Block Builder to fork and make it go fast!
This simple bar chart is constructed from a TSV file storing the frequency of letters in the English language. The chart employs conventional margins and a number of D3 features:
- d3.tsv - load and parse data
- d3.format - format percentages
- d3.scale.ordinal - x-position encoding
- d3.scale.linear - y-position encoding
- d3.max - compute domains
- d3.svg.axis - display axes
Built with blockbuilder.org
forked from walkerjeffd's block: timeseries-uncertainty
Built with blockbuilder.org
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| require(lubridate) | |
| require(plyr) | |
| require(ggplot2) | |
| theme_set(theme_bw()) | |
| # create random dataset | |
| df <- data.frame(DATETIME = ymd("2000-01-01") + ddays(runif(100)*365*5)) | |
| # compute day/month columns | |
| df <- mutate(df, |
walkerjeffd
/ zoo_regular.R
Created
August 7, 2013 23:02
R function for creating a regular and continuous zoo object from two vectors of dates/datetimes and values with optional fill values
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| zoo.regular <- function(dates, values, by="hour", fill=NA) { | |
| # convert time series to regular zoo object | |
| require(zoo) | |
| z <- zoo(values, dates) | |
| z <- merge(z, zoo(, seq(floor_date(start(z), 'day'), | |
| ceiling_date(end(z), 'day'), | |
| by)), | |
| fill=fill) | |
| z <- z[1:(length(z)-1)] | |
| return(z) |
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