r-Help Form
I'm working on a "Time-Series Calendar Heatmap" using the following code.
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 how to
change my color scaling. While scale_fill_gradient(low="red", high="green")
does what I ask, that is create a color gradient from red to green it not
what I thought it would be. What I need is discreet colors something like 0
- 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 color
those cells with 0 counts.
Jeff Reichman
Calendar Heat Map
3 messages · reichm@@j m@iii@g oii sbcgiob@i@@et, Jeff Newmiller
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. Read ?cut 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 at sbcglobal.net wrote:
r-Help Form
I'm working on a "Time-Series Calendar Heatmap" using the following
code.
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
how to
change my color scaling. While scale_fill_gradient(low="red",
high="green")
does what I ask, that is create a color gradient from red to green it
not
what I thought it would be. What I need is discreet colors something
like 0
- 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
color
those cells with 0 counts.
Jeff Reichman
[[alternative HTML version deleted]]
______________________________________________ R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Sent from my phone. Please excuse my brevity.
Jeff Thanks - that?s easy enough Jeff -----Original Message----- From: Jeff Newmiller <jdnewmil at dcn.davis.ca.us> Sent: Wednesday, February 6, 2019 7:09 AM To: r-help at r-project.org; reichmanj at sbcglobal.net Subject: Re: [R] Calendar Heat Map 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. Read ?cut 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 at sbcglobal.net wrote:
r-Help Form
I'm working on a "Time-Series Calendar Heatmap" using the following
code.
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
how to change my color scaling. While scale_fill_gradient(low="red",
high="green")
does what I ask, that is create a color gradient from red to green it
not what I thought it would be. What I need is discreet colors
something like 0
- 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
color those cells with 0 counts.
Jeff Reichman
[[alternative HTML version deleted]]
______________________________________________ R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
-- Sent from my phone. Please excuse my brevity.