CODEWITHSUNDEEP
rplotggplot2
Shreta Ghimire
Shreta Ghimire

Reputation: 1029

How do I manipulate the grids and axis with ggplot2?

I have a dataset consisting Date, maximum value, minimum value and the average. I want to plot the average value against the Date. I am using ggplot2 for this purpose. This is the code I am using:

ggplot(Data, aes(Date, Avg)) + 
  geom_point()

The plot from this code is showing several x-axis grid lines. It is plotting gridlines one for each day. But, this is not what I want.

I want to plot one grid line for one month. Lets say, the first grid line for 1st Jan, ... 12th grid for 1st Dec.

However, I am aware of assigning a new column consisting of dates, by using the following command:

seq(as.Date("2013-01-01"), as.Date("2013-12-31"), by=1)

but I want to manipulate the number of grids as per my requirement.

Thanks in advance.

Upvotes: 1

Views: 171

Answers (1)

scoa
scoa

Reputation: 19867

You can set ticks intervals on an axis with dates values with the option breaks in scale_x_datetime / scale_y_datetime. Here:

ggplot(Data, aes(Date, Avg)) + 
  geom_point() +
  scale_x_date(breaks = "1 month")

Upvotes: 1

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