Bug Fix For R Ggplot2 Error Panel

 

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Today’s article was created to help you if you get ggplot2 error streaks.

 

 

This mini-workshop describes how to create an error bar chart using R software and the ggplot2 package. There are several types of error bars that can be created using the following functions:

• geom_errorbar ()
• geom_linerange ()
• geom_pointrange ()
• geom_crossbar ()
• geom_errorbarh ()

Prepare The Data

Teeth growth data will most likely be used. It describes the effect of vitamin C on tooth growth in guinea pigs. Three doses of vitamin C (0.5, 1 and 2 mg) are used, each with two dosage regimens [orange juice (OJ) plus ascorbic acid (VC)]:

  library (ggplot2)df  

  ## Len Supp dose## at least one 4.2 VC 0.5## only two 11.5 VC 0.5## 7.3 Vc 0.5## 4 5.8 HP 0.5## 5 6. 6 HP 0.5## 6 10.0 vc 0.5  

• len: length of the tooth
• Dose: Dose in milligrams (0.5, 1, 2)
• supp: optional type or (vc JO)

In the product below, we plot the average length of the teeth in each group. The cutter deflection stroke is used to plot your own error bands on the graph.

First of all, the auxiliary work below is used to calculate some standard and average deviations for each variable of interest in each group of people:

  # +++++++++++++++++++++++++++# Function to calculate total standard deviation and mean  # for both groups# +++++++++++++++++++++++++++++++# data: fre  m data# varname: the type of column name that contains your variable  # to sum up# groupnames: a vector of column names to use as  # Grouping variablesdata_summary  

  df2  

  ## supp dose len sd## pure OJ 0.5 13.23 4.459709## 2 OJ 1 22.70 3.910953## 3 OJ 2 2 6.06 2.655058## 4 VK 0.5 7.98 2.746634## 5 CV 1 16.77 2.515309## seven VK three 26.14 4.797731  

Histogram With Error Bars

The geom_errorbar () function can be used to generate nightclub errors:

  library (ggplot2)# Standard histogramp  

Please note that you have chosen to use only the highest error bars

  # Keep top error bars only ggplot (df2, aes (x = dose, y = len, fill = supp)) +  geom_bar (stat = "identity", color = "black", position = position_dodge ()) +  geom_errorbar (aes (ymin = len, ymax = len + sd), width = .2,                 position = position_dodge (.9))  

Error Bars Line Diagram

  # Standard line schemap  

You can also use the geom_pointrange () or geom_linerange () functions instead of most of them with geom_errorbar ()

  # Use geom_pointrangeggplot (df2, aes (x = dose, y = len, group = supp, color = supp)) +geom_pointrange (aes (ymin = len-sd, ymax = len + sd))# Use geom_line () + geom_pointrange ()ggplot (df2, aes (x = dose, y = len, group = supp, color = supp)) +  geom_line () +  geom_pointrange (aes (ymin = len-sd, ymax = len + sd))  

Average +/- can be added as a horizontal line, a nice error bar, or a range of points:

  p  

This analysis was done with R-Software (version 3.2.4) and ggplot2 (version 2.1.0)

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