library(ggplot2)
library(dplyr)
library(GGally)
library(scales)
library(memisc)
library(reshape)
library(gridExtra)
df<- read.csv("D:\\project4\\wineQualityReds.csv")
df
str(df)
summary(df)
df$X = factor(df$X)
# quality
summary(df$quality)
table(df$quality)
# assertion was correct here, so let's ensure the data frame semantically
# reflects that.
df$quality <- factor(df$quality, ordered = T)
str(df$quality)
# exploratory, quick histogram plots
grid.arrange(qplot(df$fixed.acidity),
qplot(df$volatile.acidity),
qplot(df$citric.acid),
qplot(df$residual.sugar),
qplot(df$chlorides),
qplot(df$free.sulfur.dioxide),
qplot(df$total.sulfur.dioxide),
qplot(df$density),
qplot(df$pH),
qplot(df$sulphates),
qplot(df$alcohol),
qplot(df$quality),
ncol = 4)
Error: unexpected ')' in "ncol = 4)"
Error: could not find function "grid.arrange"