Hello,
I am measuring a certain variable at given time intervals and
different concentrations of a reagent. I would like to make a scatter
plot of the values, joined by a line to highlight the temporal
measure.
I can plot this all right. Now, since I have more than one replicate,
I would like to add he error bars.
I prepared a dataframe with the mean measures and a column with the
standard deviations, but when I run the code, I get the error:
```
Error in `check_aesthetics()`:
! Aesthetics must be either length 1 or the same as the data (20): colour
Run `rlang::last_trace()` to see where the error occurred.
```
I am missing something, but what?
Thank you
WORKING EXAMPLE
```
measTime = c(1 ,2 ,4 ,24 ,48 ,1 ,2 ,4 ,24
,48 ,1 ,2 ,4 ,24 ,48 ,1 ,2 ,4 ,24 ,48)
conc = c(0.25 ,0.25 ,0.25 ,0.25 ,0.25 ,1.12 ,1.12
,1.12 ,1.12 ,1.12 ,2.5 ,2.5 ,2.5 ,2.5 ,2.5
,25 ,25 ,25 ,25 ,25)
varbl = c(0.0329999999999999 ,0.27 ,0.0785 ,0.1015
,-0.193 ,0.048 ,0.113 ,0.1695 ,-0.775 ,0.464 ,-0.257
,-0.154 ,-0.3835 ,-1.23 ,-0.513 ,1.3465 ,1.276
,1.128 ,-2.56 ,-1.813)
stdDev =c(0.646632301492381 ,0 ,1.77997087991162
,0.247683265482349 ,0 ,0.282901631902917 ,0
,0.273086677326693 ,1.03807578400295 ,0 ,0.912213425319609
,0 ,1.64371621638287 ,2.23203614068709 ,0 ,0.2615396719429
,0 ,0.54039985196149 ,2.15236180353893 ,0)
df = data.frame(Time=measTime, mM=conc, ddC=varbl, SD=stdDev)
library(ggplot2)
COLS = c("green", "red", "blue", "yellow")
ggplot(df,
aes(x=Time, y=ddC, colour=mM, group=mM)) +
geom_line(aes(x=Time, y=ddC, colour=mM, group=mM)) +
geom_errorbar(aes(x=Time, ymin=ddC-SD, ymax=ddC+SD, colour=mM, group=mM),
width=.1, colour=COLS) +
geom_point(size=6) +
scale_colour_manual(values = COLS) +
ggtitle("Exposure") +
xlab(expression(bold("Time (h)"))) +
ylab(expression(bold("Value"))) +
geom_hline(aes(yintercept=0)) +
theme_classic()
```
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