[R] Calendar Heat Map
jdnewm|| @end|ng |rom dcn@d@v|@@c@@u@
Wed Feb 6 14:09:08 CET 2019
ggplot automatically chooses continuous or discrete scales depending on the type of column you give it... so don't give it a numeric column (integers are a subset of numeric)... give it a character (lazy) or factor (better for controlling what the output looks like) value for your colour specification.
for one clean way to make a new factor column in your data set before you give it to ggplot. Note that if you don't like the labels it generates automatically you can specify them yourself.
On February 5, 2019 2:28:28 PM PST, reichmanj using sbcglobal.net wrote:
>I'm working on a "Time-Series Calendar Heatmap" using the following
>ggplot(myData, aes(monthweek, weekdayf, fill = myData $adjusted)) +
>geom_tile(colour = "white") + facet_grid(year(myData $date)~monthf) +
>scale_fill_gradient(low="red", high="green") +
>xlab("Week of Month") + ylab("") +
>ggtitle("Time-Series Calendar Heatmap ") + labs(fill = "Price")
>While the ggplot commands do (almost) what I want I can't figure out
>change my color scaling. While scale_fill_gradient(low="red",
>does what I ask, that is create a color gradient from red to green it
>what I thought it would be. What I need is discreet colors something
>- grey; 1:5 - blue; 6:10 - green etc. How to I set discrete colors for
>groups of values. A color ramp would work but I need to separately
>those cells with 0 counts.
> [[alternative HTML version deleted]]
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Sent from my phone. Please excuse my brevity.
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