ggplot and geom_line trouble

[algodine]

Hello,
I am new to R, and by new I mean I've only started using it last Thursday..
I am trying to create a line graph showing data for separate housing units but I cant seem to figure it out. I used the following to try to plot my data

d.wastewaternew$sampledate = mdy(d.wastewaternew$ï..DateResult)
d.wastewaternew %>%
  ggplot(aes(x = ï..DateResult, y= SARS2_levels, color = Hall)) + geom_line()

and the result I got was the first image, which shows now data plots and has the dates all jumbled up

On the second try, I changed ï..DateResult in the sting to sampledate, which was the new mdy variable I had created for this data set and it gave me the following. Now instead of plotting by day its just plotting months, which is not what I need for the graph

any tips would be greatly appreciated

[andresrcs]

Hi!

To help us help you, could you please prepare a reproducible example (reprex) illustrating your issue? Please have a look at this guide, to see how to create one:

FAQ: How to do a minimal reproducible example ( reprex ) for beginners

A minimal reproducible example consists of the following items: A minimal dataset, necessary to reproduce the issue The minimal runnable code necessary to reproduce the issue, which can be run on the given dataset, and including the necessary information on the used packages. Let's quickly go over each one of these with examples: Minimal Dataset (Sample Data) You need to provide a data frame that is small enough to be (reasonably) pasted on a post, but big enough to reproduce your issue. Let's say, as an example, that you are working with the iris data frame head(iris) #> Sepal.Length Sepal.Width Petal.Length Petal.Width Species #> 1 5.1 3.5 1.4 0.…

[algodine]

> datapasta::df_paste(head(d.wastewaternew))
named list()
> reprex::reprex({
+ library("ggplot2")
+ library(lubridate)
+ library(magrittr)
+ library(dplyr)
+ d.wastewaternew$sampledate = mdy(d.wastewaternew$ï..DateResult)
+ d.wastewaternew %>%
+   ggplot(aes(x = ï..DateResult, y= SARS2_levels, color = Hall)) + geom_line()
+ datapasta::df_paste(head(d.wastewaternew))
+ data.frame(
+   stringsAsFactors = FALSE,
+      ï..DateResult = c("9/1/2020","9/4/2020",
+                        "9/10/2020","9/15/2020","9/17/2020","9/22/2020"),
+               Hall = c("Booth Hall","Booth Hall",
+                        "Booth Hall","Booth Hall","Booth Hall","Booth Hall"),
+       SARS2_levels = c(0, 0, 0, 0, 0, 0),
+         sampledate = c("2020-09-01","2020-09-04",
+                        "2020-09-10","2020-09-15","2020-09-17","2020-09-22")
+ )})

[andresrcs]

Not quite a reprex but good enough I think.

To plot dates in the x-axis you need to use a proper date variable, not character strings, and to customize the "date breaks" of your plot you can use the scale_x_date() function. Check this example:

library(tidyverse)

d.wastewaternew <- data.frame(
    stringsAsFactors = FALSE,
    ï..DateResult = c("9/1/2020","9/4/2020",
                      "9/10/2020","9/15/2020","9/17/2020","9/22/2020"),
    Hall = c("Booth Hall","Booth Hall",
             "Booth Hall","Booth Hall","Booth Hall","Booth Hall"),
    SARS2_levels = c(0, 0, 0, 0, 0, 0),
    sampledate = as.Date(c("2020-09-01","2020-09-04",
                   "2020-09-10","2020-09-15","2020-09-17","2020-09-22"))
)

d.wastewaternew %>%
    ggplot(aes(x = sampledate, y = SARS2_levels, color = Hall)) + 
    geom_line() +
    scale_x_date(date_breaks = "1 day",
                 labels = scales::label_date_short())

^{Created on 2021-04-18 by the reprex package (v2.0.0)}