solar: Energy Output From Two Solar Arrays in San Francisco

In openintro: Data Sets and Supplemental Functions from 'OpenIntro' Textbooks and Labs

Energy Output From Two Solar Arrays in San Francisco

Description

The data provide the energy output for several months from two roof-top solar arrays in San Francisco. This city is known for having highly variable weather, so while these two arrays are only about 1 mile apart from each other, the Inner Sunset location tends to have more fog.

Usage

solar

Format

A data frame with 284 observations on the following 3 variables. Each row represents a single day for one of the arrays.

location

Location for the array.

date

Date.

kwh

Number of kWh

Details

The Haight-Ashbury array is a 10.4 kWh array, while the Inner Sunset array is a 2.8 kWh array. The kWh units represents kilowatt-hours, which is the unit of energy that typically is used for electricity bills. The cost per kWh in San Francisco was about $0.25 in 2016.

Source

These data were provided by Larry Rosenfeld, a resident in San Francisco.

Examples

solar.is <- subset(solar, location == "Inner_Sunset")
solar.ha <- subset(solar, location == "Haight_Ashbury")
plot(solar.is$date, solar.is$kwh, type = "l", ylim = c(0, max(solar$kwh)))
lines(solar.ha$date, solar.ha$kwh, col = 4)

d <- merge(solar.ha, solar.is, by = "date")
plot(d$date, d$kwh.x / d$kwh.y, type = "l")

openintro documentation built on Sept. 1, 2022, 9:06 a.m.