Why doesn't ggplot2 work with my dataframe time series

Question

I created a dataframe datos_f.csv with 5 columns (date, months, pp, tmax and tmin) from meteorological .csv data.

I've been trying to plot a time series using one of these variables and the dates, but ggplot2 doesn't plot. It only shows the axis.

I'm novice in R, but I'm trying different methods and nothing is working.

Thanks so much for reading!

My dataframe (with 16071 rows) is:

> head(datos_f)
       fecha   mes  pp tmax tmin
1  1970-01-01 Enero 0.0 29.9 18.2
2  1970-01-02 Enero 0.0 30.3 18.4
3  1970-01-03 Enero 0.0 31.0 18.0
4  1970-01-04 Enero 0.0 29.9 16.8
5  1970-01-05 Enero 0.0 30.2 19.4
6  1970-01-06 Enero 0.0 31.6 18.7
7  1970-01-07 Enero 0.0 32.2 17.8
8  1970-01-08 Enero 0.0 32.0 19.2
9  1970-01-09 Enero 0.0 34.2 18.8
10 1970-01-10 Enero 0.0 33.0 17.4
11 1970-01-11 Enero 0.0 32.8 17.2
12 1970-01-12 Enero 0.0 30.6 18.3
13 1970-01-13 Enero 0.0 33.2 19.4
14 1970-01-14 Enero 0.0 29.4 19.8
15 1970-01-15 Enero 3.9 29.8 20.0

I used this simple order:

ggplot(data=datos_f,aes(x=fecha,y=tmax),geom_point(size=2))

but this shows me an empty image with only the axis:

Any ideas?

Answer 1

ggplot2 syntax is a little bit different from normal R syntaxes. It uses + operator.

ggplot(data=datos_f,aes(x=fecha,y=tmax)) + geom_point(size=2)

Here + operator overloads the function geom_point on the ggplot object