Re: [R] How to plot both lines and points by group on ggplot2
Thank you that is exactly it!
The problem was to connect each point of the series 'Conc' with a line.
Best regards
Luigi
On Sat, Jul 1, 2023 at 8:33 PM Chris Evans wrote:
>
>
> On 01/07/2023 19:20, Luigi Marongiu wrote:
> > Hello,
> > I have a dataframe with measurements stratified by the concentration
> > of a certain substance. I would like to plot the points of the
> > measures and connect the points within each series of concentrations.
> > When I launch ggplot2 I get the error
> > ```
> > geom_path: Each group consists of only one observation. Do you need to
> > adjust the
> > group aesthetic?
> > ```
> > and no lines are drawn.
> > Where am I going wrong?
> > Thank you
> > Luigi
> >
> > ```
> > df = data.frame(Conc = c(rep(1, 3), rep(2, 3), rep(5, 3)),
> > Time = rep(1:3, 3),
> > Value = c(0.91, 0.67, 0.71, 0.91, 0.65, 0.74, 0.95, 0.67,
> > 0.67))
> > df$Time <- as.factor(df$Time)
> > levels(df$Time) = c(1, 4, 24)
> > df$Conc <- as.factor(df$Conc)
> > levels(df$Conc) = c(1, 2, 5)
> > library(ggplot2)
> > ggplot(df, aes(x=Time, y=Value, colour=Conc)) +
> >geom_point(size=6) +
> >geom_line(aes(x=Time, y=Value, colour=Conc)) +
> >scale_colour_manual(values = c("darkslategray3", "darkslategray4",
> > "deepskyblue4")) +
> >ggtitle("Working example") +
> >xlab(expression(bold("Time (h)"))) +
> >ylab(expression(bold("Concentration (mM)")))
> > ```
>
> If I understand what you want then I think all you need is to add "group
> = Conc". That's what that message is telling you.
>
> df = data.frame(Conc = c(rep(1, 3), rep(2, 3), rep(5, 3)),
> Time = rep(1:3, 3),
> Value = c(0.91, 0.67, 0.71, 0.91, 0.65, 0.74, 0.95,
> 0.67, 0.67))
> df$Time <- as.factor(df$Time)
> levels(df$Time) = c(1, 4, 24)
> df$Conc <- as.factor(df$Conc)
> levels(df$Conc) = c(1, 2, 5)
> library(ggplot2)
> ggplot(df, aes(x=Time, y=Value, colour=Conc, group = Conc)) +
>geom_point(size=6) +
>geom_line(aes(x=Time, y=Value, colour=Conc)) +
>scale_colour_manual(values = c("darkslategray3", "darkslategray4",
> "deepskyblue4")) +
>ggtitle("Working example") +
>xlab(expression(bold("Time (h)"))) +
>ylab(expression(bold("Concentration (mM)")))
>
> Very best,
>
>
> Chris
>
> --
> Chris Evans (he/him)
> Visiting Professor, UDLA, Quito, Ecuador & Honorary Professor,
> University of Roehampton, London, UK.
> Work web site: https://www.psyctc.org/psyctc/
> CORE site: http://www.coresystemtrust.org.uk/
> Personal site: https://www.psyctc.org/pelerinage2016/
> Emeetings (Thursdays):
> https://www.psyctc.org/psyctc/booking-meetings-with-me/
> (Beware: French time, generally an hour ahead of UK)
>
--
Best regards,
Luigi
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Re: [R] How to plot both lines and points by group on ggplot2
Às 19:20 de 01/07/2023, Luigi Marongiu escreveu:
Hello,
I have a dataframe with measurements stratified by the concentration
of a certain substance. I would like to plot the points of the
measures and connect the points within each series of concentrations.
When I launch ggplot2 I get the error
```
geom_path: Each group consists of only one observation. Do you need to
adjust the
group aesthetic?
```
and no lines are drawn.
Where am I going wrong?
Thank you
Luigi
```
df = data.frame(Conc = c(rep(1, 3), rep(2, 3), rep(5, 3)),
Time = rep(1:3, 3),
Value = c(0.91, 0.67, 0.71, 0.91, 0.65, 0.74, 0.95, 0.67,
0.67))
df$Time <- as.factor(df$Time)
levels(df$Time) = c(1, 4, 24)
df$Conc <- as.factor(df$Conc)
levels(df$Conc) = c(1, 2, 5)
library(ggplot2)
ggplot(df, aes(x=Time, y=Value, colour=Conc)) +
geom_point(size=6) +
geom_line(aes(x=Time, y=Value, colour=Conc)) +
scale_colour_manual(values = c("darkslategray3", "darkslategray4",
"deepskyblue4")) +
ggtitle("Working example") +
xlab(expression(bold("Time (h)"))) +
ylab(expression(bold("Concentration (mM)")))
```
Hello,
Here are two solutions. I have removed the redundant aes() from
geom_line in both plots.
1. If you do not coerce Time to factor, the x axis will be continuous.
The plot will be as expected but you wi have to include a
scale_x_continuous to have the wanted labels.
df = data.frame(Conc = c(rep(1, 3), rep(2, 3), rep(5, 3)),
Time = rep(1:3, 3),
Value = c(0.91, 0.67, 0.71, 0.91, 0.65, 0.74, 0.95,
0.67, 0.67))
library(ggplot2)
df$Conc <- factor(df$Conc, levels = c(1, 2, 5))
ggplot(df, aes(x=Time, y=Value, colour=Conc)) +
geom_point(size=6) +
geom_line() +
scale_colour_manual(values = c("darkslategray3", "darkslategray4",
"deepskyblue4")) +
scale_x_continuous(breaks = 1:3, labels = c(1, 2, 24)) +
ggtitle("Working example") +
xlab(expression(bold("Time (h)"))) +
ylab(expression(bold("Concentration (mM)")))
2. Time is coerced to factor. Then, tell geom_line the data is grouped
by Conc. This is probably the solution you should use.
df$Time <- factor(df$Time, labels = c(1, 4, 24))
ggplot(df, aes(x=Time, y=Value, colour=Conc)) +
geom_point(size=6) +
geom_line(aes(group = Conc)) +
scale_colour_manual(values = c("darkslategray3", "darkslategray4",
"deepskyblue4")) +
ggtitle("Working example") +
xlab(expression(bold("Time (h)"))) +
ylab(expression(bold("Concentration (mM)")))
Hope this helps,
Rui Barradas
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Re: [R] How to plot both lines and points by group on ggplot2
... and so ignore my previous missive, as you *did* provide data.
Sorry for the noise.
-- Bert
On Sat, Jul 1, 2023 at 11:53 AM Chris Evans via R-help
wrote:
>
> [Whoops, forgot that default reply-to is to the sender.]
>
>
> On 01/07/2023 19:20, Luigi Marongiu wrote:
> > Hello,
> > I have a dataframe with measurements stratified by the concentration
> > of a certain substance. I would like to plot the points of the
> > measures and connect the points within each series of concentrations.
> > When I launch ggplot2 I get the error
> > ```
> > geom_path: Each group consists of only one observation. Do you need to
> > adjust the
> > group aesthetic?
> > ```
> > and no lines are drawn.
> > Where am I going wrong?
> > Thank you
> > Luigi
> >
> > ```
> > df = data.frame(Conc = c(rep(1, 3), rep(2, 3), rep(5, 3)),
> > Time = rep(1:3, 3),
> > Value = c(0.91, 0.67, 0.71, 0.91, 0.65, 0.74, 0.95, 0.67, 0.67))
> > df$Time <- as.factor(df$Time)
> > levels(df$Time) = c(1, 4, 24)
> > df$Conc <- as.factor(df$Conc)
> > levels(df$Conc) = c(1, 2, 5)
> > library(ggplot2)
> > ggplot(df, aes(x=Time, y=Value, colour=Conc)) +
> > geom_point(size=6) +
> > geom_line(aes(x=Time, y=Value, colour=Conc)) +
> > scale_colour_manual(values = c("darkslategray3", "darkslategray4",
> > "deepskyblue4")) +
> > ggtitle("Working example") +
> > xlab(expression(bold("Time (h)"))) +
> > ylab(expression(bold("Concentration (mM)")))
> > ```
>
> If I understand what you want then I think all you need is to add "group
> = Conc". That's what that message is telling you.
>
> df = data.frame(Conc = c(rep(1, 3), rep(2, 3), rep(5, 3)),
> Time = rep(1:3, 3),
> Value = c(0.91, 0.67, 0.71, 0.91, 0.65, 0.74, 0.95,
> 0.67, 0.67))
> df$Time <- as.factor(df$Time)
> levels(df$Time) = c(1, 4, 24)
> df$Conc <- as.factor(df$Conc)
> levels(df$Conc) = c(1, 2, 5)
> library(ggplot2)
> ggplot(df, aes(x=Time, y=Value, colour=Conc, group = Conc)) +
>geom_point(size=6) +
>geom_line(aes(x=Time, y=Value, colour=Conc)) +
>scale_colour_manual(values = c("darkslategray3", "darkslategray4",
> "deepskyblue4")) +
>ggtitle("Working example") +
>xlab(expression(bold("Time (h)"))) +
>ylab(expression(bold("Concentration (mM)")))
>
> Very best,
>
>
> Chris
>
> --
> Chris Evans (he/him)
> Visiting Professor, UDLA, Quito, Ecuador & Honorary Professor, University of
> Roehampton, London, UK.
> Work web site: https://www.psyctc.org/psyctc/
> CORE site: http://www.coresystemtrust.org.uk/
> Personal site: https://www.psyctc.org/pelerinage2016/
> Emeetings (Thursdays): https://www.psyctc.org/psyctc/booking-meetings-with-me/
> (Beware: French time, generally an hour ahead of UK)
>
>
> __
> R-help@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.
__
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Re: [R] How to plot both lines and points by group on ggplot2
[Whoops, forgot that default reply-to is to the sender.]
On 01/07/2023 19:20, Luigi Marongiu wrote:
Hello,
I have a dataframe with measurements stratified by the concentration
of a certain substance. I would like to plot the points of the
measures and connect the points within each series of concentrations.
When I launch ggplot2 I get the error
```
geom_path: Each group consists of only one observation. Do you need to
adjust the
group aesthetic?
```
and no lines are drawn.
Where am I going wrong?
Thank you
Luigi
```
df = data.frame(Conc = c(rep(1, 3), rep(2, 3), rep(5, 3)),
Time = rep(1:3, 3),
Value = c(0.91, 0.67, 0.71, 0.91, 0.65, 0.74, 0.95, 0.67, 0.67))
df$Time <- as.factor(df$Time)
levels(df$Time) = c(1, 4, 24)
df$Conc <- as.factor(df$Conc)
levels(df$Conc) = c(1, 2, 5)
library(ggplot2)
ggplot(df, aes(x=Time, y=Value, colour=Conc)) +
geom_point(size=6) +
geom_line(aes(x=Time, y=Value, colour=Conc)) +
scale_colour_manual(values = c("darkslategray3", "darkslategray4",
"deepskyblue4")) +
ggtitle("Working example") +
xlab(expression(bold("Time (h)"))) +
ylab(expression(bold("Concentration (mM)")))
```
If I understand what you want then I think all you need is to add "group
= Conc". That's what that message is telling you.
df = data.frame(Conc = c(rep(1, 3), rep(2, 3), rep(5, 3)),
Time = rep(1:3, 3),
Value = c(0.91, 0.67, 0.71, 0.91, 0.65, 0.74, 0.95,
0.67, 0.67))
df$Time <- as.factor(df$Time)
levels(df$Time) = c(1, 4, 24)
df$Conc <- as.factor(df$Conc)
levels(df$Conc) = c(1, 2, 5)
library(ggplot2)
ggplot(df, aes(x=Time, y=Value, colour=Conc, group = Conc)) +
geom_point(size=6) +
geom_line(aes(x=Time, y=Value, colour=Conc)) +
scale_colour_manual(values = c("darkslategray3", "darkslategray4",
"deepskyblue4")) +
ggtitle("Working example") +
xlab(expression(bold("Time (h)"))) +
ylab(expression(bold("Concentration (mM)")))
Very best,
Chris
--
Chris Evans (he/him)
Visiting Professor, UDLA, Quito, Ecuador & Honorary Professor, University of
Roehampton, London, UK.
Work web site: https://www.psyctc.org/psyctc/
CORE site: http://www.coresystemtrust.org.uk/
Personal site: https://www.psyctc.org/pelerinage2016/
Emeetings (Thursdays): https://www.psyctc.org/psyctc/booking-meetings-with-me/
(Beware: French time, generally an hour ahead of UK)
__
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
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Re: [R] How to plot both lines and points by group on ggplot2
Can your post a few lines of your data frame (e.g. via
dput(head(...))) to make it clearer. I found this statement confusing:
"... measurements stratified by the concentration
of a certain substance. I would like to plot the points of the
measures and connect the points within each series of concentrations."
This might or might not be the source of your problems, but I think
showing us (enough of) your data would help clarify things. I don't
use ggplot, but someone who does might have a better chance of
pinpointing the problem if you provide such data.
Cheers,
Bert
On Sat, Jul 1, 2023 at 11:21 AM Luigi Marongiu wrote:
>
> Hello,
> I have a dataframe with measurements stratified by the concentration
> of a certain substance. I would like to plot the points of the
> measures and connect the points within each series of concentrations.
> When I launch ggplot2 I get the error
> ```
> geom_path: Each group consists of only one observation. Do you need to
> adjust the
> group aesthetic?
> ```
> and no lines are drawn.
> Where am I going wrong?
> Thank you
> Luigi
>
> ```
> df = data.frame(Conc = c(rep(1, 3), rep(2, 3), rep(5, 3)),
> Time = rep(1:3, 3),
> Value = c(0.91, 0.67, 0.71, 0.91, 0.65, 0.74, 0.95, 0.67,
> 0.67))
> df$Time <- as.factor(df$Time)
> levels(df$Time) = c(1, 4, 24)
> df$Conc <- as.factor(df$Conc)
> levels(df$Conc) = c(1, 2, 5)
> library(ggplot2)
> ggplot(df, aes(x=Time, y=Value, colour=Conc)) +
> geom_point(size=6) +
> geom_line(aes(x=Time, y=Value, colour=Conc)) +
> scale_colour_manual(values = c("darkslategray3", "darkslategray4",
> "deepskyblue4")) +
> ggtitle("Working example") +
> xlab(expression(bold("Time (h)"))) +
> ylab(expression(bold("Concentration (mM)")))
> ```
> --
> Best regards,
> Luigi
>
> __
> R-help@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.
__
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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and provide commented, minimal, self-contained, reproducible code.
