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scale_x_date in ggplot2

How to make plots in R and ggplot2 using scale_x_date.

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## [1] ''

By Month


x <- c("04-01-10","05-01-10","06-01-10","07-01-10","08-01-10","09-01-10","10-01-10","11-01-10","12-01-10","01-01-11","02-01-11","03-01-11","04-01-11","05-01-11","06-01-11","07-01-11","08-01-11","09-01-11","10-01-11","11-01-11","12-01-11","01-01-12","02-01-12","03-01-12","04-01-12","05-01-12","06-01-12")
y <- c(120,210,130,160,190,210,80,70,110,120,140,160,130,200,110,180,210,200,90,60,100,100,120,170,100,180,120)

MySample <- data.frame(x) ## convert to dataframe
MySample$y <- y

# install.packages("lubridate")

MySample$date <- as.Date(MySample$x, "%m-%d-%y")
MySample$year <- year(MySample$date)

p <- ggplot(MySample, aes(date, y, fill = year)) +
    geom_bar(y=y,stat="identity") +
    facet_grid(. ~ year, scales = "free") +
    scale_x_date(labels = date_format("%b/%y")) +
## Error in check_breaks_labels(breaks, labels): could not find function "date_format"
p <- ggplotly(p)
## Error in ggplotly(p): object 'p' not found
# Create a shareable link to your chart
# Set up API credentials:
chart_link = plotly_POST(p, filename="scalex/month")
## Error in plotly_build(x): object 'p' not found
## Error in eval(expr, envir, enclos): object 'chart_link' not found
## Error in eval(expr, envir, enclos): object 'chart_link' not found

Inspired by Stack Overflow.

By Year


Date <- seq(as.Date("2010/1/1"), as.Date("2014/1/1"), "week")
Y <- rnorm(n=length(Date), mean=100, sd=1)
df <- data.frame(Date, Y)

df$Year <- format(df$Date, "%Y")
df$Month <- format(df$Date, "%b")
df$Day <- format(df$Date, "%d")

df$MonthDay <- format(df$Date, "%d-%b")

df$CommonDate <- as.Date(paste0("2000-",format(df$Date, "%j")), "%Y-%j")

p <- ggplot(data = df,
     mapping = aes(x = CommonDate, y = Y, shape = Year, colour = Year)) +
     geom_point() +
     geom_line() +
     facet_grid(facets = Year ~ .) +
     scale_x_date(labels = function(x) format(x, "%d-%b"))

p <- ggplotly(p)

# Create a shareable link to your chart
# Set up API credentials:
chart_link = plotly_POST(p, filename="scalex/year")

Inspired by Stack Overflow.

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