Some (very) basic R commands for simple statistics: Difference between revisions
(Created page with "==Statistical Methods== '''(Very) Basic R Commands''' To install packages: ''install.packages("package")'' To run library: "library(package)" '''Useful packages:''' library(...") |
No edit summary |
||
| (One intermediate revision by one other user not shown) | |||
| Line 1: | Line 1: | ||
To install packages: <code>install.packages("package")</code> | |||
To run library: <code>library(package)</code> | |||
To run library: | |||
'''Useful packages:''' | '''Useful packages:''' | ||
<code> | |||
library(xlsx) | library(xlsx) | ||
| Line 26: | Line 24: | ||
library(lme4) | library(lme4) | ||
</code> | |||
'''The help function:''' | '''The help function:''' | ||
<code>?? query</code> (I.e. <code>?? lm</code>) | |||
'''To import data on an excel sheet:''' | '''To import data on an excel sheet:''' | ||
<code> | |||
library(xlsx) | |||
Data <- read.xlsx("Data.xlsx", sheet no.) | |||
attach(Data) | |||
</code> | |||
'''To generate a subset of a dataframe:''' | '''To generate a subset of a dataframe:''' | ||
<code>subset.data <- subset(Data, factor=="group1")</code> | |||
'''Linear Analysis:''' | '''Linear Analysis:''' | ||
<code> | |||
"m <- lm(a ~ b, data=Data)" | "m <- lm(a ~ b, data=Data)" | ||
| Line 60: | Line 60: | ||
"boxcoxfit(Data$a)" | "boxcoxfit(Data$a)" | ||
</code> | |||
'''Diagnostic tests:''' | '''Diagnostic tests:''' | ||
<code> | |||
"par(mfrow=c(2, 3))" | "par(mfrow=c(2, 3))" | ||
"plot(m, which=1:6)" | "plot(m, which=1:6)" | ||
</code> | |||
'''Plotting:''' | '''Plotting:''' | ||
| Line 73: | Line 76: | ||
Other basic plotting; | Other basic plotting; | ||
<code> | |||
"plot(x, y)" | "plot(x, y)" | ||
| Line 78: | Line 82: | ||
"abline(m, col="red")" | "abline(m, col="red")" | ||
</code> | |||
===Back To Main Page=== | |||
[[Main Page]] | |||
Latest revision as of 19:54, 1 April 2016
To install packages: install.packages("package")
To run library: library(package)
Useful packages:
library(xlsx)
library(geoR)
library(ggplot2)
library(HH)
library(nortest)
library(tseries)
library(fUtilities)
library(nlme)
library(lme4)
The help function:
?? query (I.e. ?? lm)
To import data on an excel sheet:
library(xlsx)
Data <- read.xlsx("Data.xlsx", sheet no.)
attach(Data)
To generate a subset of a dataframe:
subset.data <- subset(Data, factor=="group1")
Linear Analysis:
"m <- lm(a ~ b, data=Data)"
"summary(m)"
"drop1(m, test="F")"
"ancova(a ~ b*factor, data=Data)"
"t.test(Data$a, Data$b)"
"cor.test(Data$a, Data$b, method="spearman")"
"ad.test(Data$a)"
"boxcoxfit(Data$a)"
Diagnostic tests:
"par(mfrow=c(2, 3))"
"plot(m, which=1:6)"
Plotting:
The package "ggplot2" makes lovely figures and there are many guides for how to use it on the web.
Other basic plotting;
"plot(x, y)"
"m <- lm(y ~ x)"
"abline(m, col="red")"
