R Studio 中的“找不到对象”答案

【问题标题】："Object not found" in R StudioR Studio 中的“找不到对象”
【发布时间】：2023-01-01 22:31:52
【问题描述】：

我最初绘制了一个散点图，然后成功地进行了我的统计分析，但是，当我将误差线添加到我的初始图中时，它现在说 object not found 我已附上我的代码和显示的错误。任何帮助将不胜感激，因为我是 R Studio 的新手。

library(readxl)
combined <- read_excel("Data-raw/combined.xlsx")
View(combined)
ls(combined)
ls(combinedsum)


# Plotting the data  
ggplot() +
  geom_point(data = combined, aes, (Salt_concentration), y = generation_time)


# Summaries the data 
combinedsum <- combined %>% 
  group_by(Salt_concentration) %>% 
  summarise(mean = mean(generation_time),
            std = sd(generation_time),
            n = length(generation_time),
            se = std/sqrt(n))

# Running the anova 
mod <- aov(data = combined,
           generation_time ~ Salt_concentration)

summary(mod)

# Checking assumptions 
hist(mod$residuals)
shapiro.test(mod$residuals)

plot(mod, which=1)

# The results are not normally distributed, 
# Residuals not normal, and unequal variance is present. Non param-metric equilaveltn is needed. 

kruskal.test(data = combined, generation_time ~ Salt_concentration)

# There is a significant effect of Salt-concentration on generation_time. 
# To determine which groups differ Post-hoc test needed e.g., kruskalmc() in pgirmess package
install.packages('pgirmess')
library(pgirmess)
kruskalmc(data = combined, generation_time ~ Salt_concentration)

显示错误

图层错误（数据=数据，映射=映射，stat=stat，geom=GeomPoint，：找不到对象'salt_concentration'

感谢您的帮助。

【问题讨论】：

标签： r ggplot2 rstudio

【解决方案1】：

当你执行

colnames(combined)

你看到Salt_concentration列了吗？

【讨论】：

代码运行但不显示列。 – 吉姆 G
@LeahSmith：更新了我的答案。请尝试 colnames。