How to plot the graph using all the dates in x axis using R?

[Gokul Anand]

I want to plot a graph with all the dates in x axis.

Here is the code I used

```

library(tidyverse)

library(readxl)

data <- readxl::read_excel("Sentinel-1 Metadata info.xls")

centroid <- slice(data,1)

data %>% 

  ggplot(aes(`Date of acquisition`, `Bperp(m)`)) +

  geom_point() +

  geom_segment(aes(x = centroid$`Date of acquisition`, y = centroid$`Bperp(m)`, 

                   xend = `Date of acquisition`, yend = `Bperp(m)`)) +

  theme_minimal()

```

I got the graph like this

But I want to display all the dates in the format DDMMYYYY.

[Brandon Hurr]

Check out the docs for ggplot2::scale_x_date()

https://ggplot2.tidyverse.org/reference/scale_date.html

Should be something like

base + scale_x_date(date_labels = "%d%m%Y")

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[Gokul Anand]

The error comes like

Error in data %>% ggplot(aes(`Date of acquisition`, `Bperp(m)`)) : 
  could not find function "%>%"

[Roman Luštrik]

If I search the internet for your error message (could not find function "%>%"), even on ecosia, this is the first hit:

https://stackoverflow.com/questions/30248583/error-could-not-find-function

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In God we trust, all others bring data.

[Gokul Anand]

Still not working sir

On Thursday, April 9, 2020 at 8:40:21 PM UTC+5:30, Gokul Anand wrote:

[Roman Luštrik]

When claiming that something is not working, it would help if you show what you tried (a reproducible example goes a long way here) and what is not working. Are there any errors?

Cheers,

Roman

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[Gokul Anand]

According to the stackoverflow I tried and got output like this. I am very new to R but I could understand the concept if I get a direct example which is equivalent to what I am trying.

> library(tidyverse) > library(readxl) > library(magrittr) # needs to be run every time you start R and want to use %>% > library(dplyr) # alternatively, this also loads %>% > > data <- read_excel("Desktop/Sentinel-1 Metadata info.xls")

> centroid <- slice(data,1) > > > data %>%

+ ggplot(aes(`Date of acquisition`, `Bperp(m)`)) + + geom_point() +

+ geom_segment(aes(x = centroid$`Date of acquisition`, y = centroid$`Bperp(m)`,

+ xend = `Date of acquisition`, yend = `Bperp(m)`)) + + scale_x_date(date_labels = "%d/%m/%Y") + + theme_minimal() Error: Invalid input: date_trans works with objects of class Date only

>

On Thursday, April 9, 2020 at 8:40:21 PM UTC+5:30, Gokul Anand wrote:

[Roman Luštrik]

Two things,

you should not pass values to arguments within `aes`. For example, you do

aes(x = centroid$`Date of acquisition`...)

but should be

aes(x = `Date of acquisition`...)

The error message says that your variable is (Date of acquisition) is not in the proper Date format. You will have to use `as.Date` to properly convert what you have now to a Date format. If help file for as.Date is not clear enough, please search the internet. This question has been answered many times.

Cheers,

Roman 

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