[R-sig-Geo] Selecting a range of values in a specific column for R ggplot

Thu Oct 13 21:04:47 CEST 2022

The best way would probably be that you could create a new column indicating which subset each row is in and then set that to the color aesthetic in the aes call. Alternatively, you could call geom_density multiple times and overwrite the data argument and change the color.

For example
GEV$set<-  NA #initialize new column as NA's
# Now create code to fill in the set column appropriately (e.g. as "set1", "set2", "set3", etc)
ggplot(data=GEV[c(1:4, 17:21, 30:34),], aes(x=RL45, color=set)) +
geom_density() +
xlab("One-day max (mm/day)") +
ggtitle("Global one-day max Return Level (RCP 4.5)") +
xlim(300, 450)

OR

ggplot() +
geom_density(data=GEV[1:4,], mapping = aes(x=RL45), color="midnightblue") +
geom_density(data=GEV[17:21,], mapping = aes(x=RL45), color="green")+
geom_density(data=GEV[30:34,], mapping = aes(x=RL45), color="red")+
xlab("One-day max (mm/day)") +
ggtitle("Global one-day max Return Level (RCP 4.5)") +
xlim(300, 450)
________________________________
From: rain1290 using aim.com <rain1290 using aim.com>
Sent: Thursday, October 13, 2022 2:21 PM
To: Alexander Ilich <ailich using usf.edu>; bfalevlist using gmail.com <bfalevlist using gmail.com>; r-sig-geo using r-project.org <r-sig-geo using r-project.org>
Subject: Re: [R-sig-Geo] Selecting a range of values in a specific column for R ggplot

Finally, let's say that I wanted to add several lines/curves on the same plot using different subsets, how would we do this? I tried the following:

newplot1 <- ggplot(data=GEV[17:21,], aes(x=RL45)) + geom_density(color="midnightblue") + xlab("One-day max (mm/day)") + ggtitle("Global one-day max Return Level (RCP 4.5)") + xlim(300, 450) + (data=GEV[1:5,], aes(x=RL45)) + geom_density(color="blue")

I receive this error in the process:

Error: unexpected ',' in "newplot1 <- ggplot(data=GEV[17:21,], aes(x=RL45)) + geom_density(color="midnightblue") + xlab("One-day max (mm/day)") + ggtitle("Global one-day max Return Level (RCP 4.5)") + xlim(300, 450) + (d"

Here, I am identifying two different subsets to create two different lines on the same plot, but for some reason, this strange error occurs. Unless, there is a way to specify all of the subsets desired earlier in the command?

Thanks,

-----Original Message-----
From: Alexander Ilich <ailich using usf.edu>
To: bfalevlist using gmail.com <bfalevlist using gmail.com>; r-sig-geo using r-project.org <r-sig-geo using r-project.org>; rain1290 using aim.com <rain1290 using aim.com>
Sent: Thu, Oct 13, 2022 2:07 pm
Subject: Re: [R-sig-Geo] Selecting a range of values in a specific column for R ggplot

Make sure to include the comma after the numbers so that you're selecting rows x through y and all columns. For example, GEV[17:21,] not GEV[17:21]
________________________________
From: R-sig-Geo <r-sig-geo-bounces using r-project.org> on behalf of rain1290--- via R-sig-Geo <r-sig-geo using r-project.org>
Sent: Thursday, October 13, 2022 1:08 PM
To: bfalevlist using gmail.com <bfalevlist using gmail.com>; r-sig-geo using r-project.org <r-sig-geo using r-project.org>
Subject: Re: [R-sig-Geo] Selecting a range of values in a specific column for R ggplot

That you so much! Yes, this stopped the error from appearing.
>From what I see, though, when I attempt to change the subset from [1:4] to, say, [17:21] or [30:34], I end up with the exact same plots. Why could that be? The idea would be to make different curves on the same plot by changing the subset.

-----Original Message-----
From: Bede-Fazekas �kos <bfalevlist using gmail.com>
To: r-sig-geo using r-project.org
Sent: Thu, Oct 13, 2022 12:37 pm
Subject: Re: [R-sig-Geo] Selecting a range of values in a specific column for R ggplot

Hello,
try
newplot <- ggplot(data = GEV[1:4, ], aes(x = RL45)) + geom_density(color
= "midnightblue") + xlab("Location (mm/day") + ggtitle("Global Location
under RCP4.5") + xlim(300, 350)
HTH,
�kos
-----------
�kos Bede-Fazekas
Centre for Ecological Research, Hungary

2022.10.13. 18:27 keltez�ssel, rain1290--- via R-sig-Geo �rta:
> I am trying to select a range of values (i.e. the first 4 values) in a specific column from a table. The column is called "RL45". I tried the following code to create a plot in ggplot:
> newplot <- ggplot(data = GEV, aes(x = RL45[1:4])) + geom_density(color = "midnightblue") + xlab("Location (mm/day") + ggtitle("Global Location under RCP4.5") + xlim(300, 350)
>
> This results in this strange error:
>
> Error: Aesthetics must be either length 1 or the same as the data (34): x
>
> This is odd, as I selected the first 4 values in that "RL45" column.
> Any thoughts would be greatly appreciated!
> Thank you,
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>
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