Difference between revisions of "R1"
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(Created page with 'category:Pragmatic Programming '''Open Source Statistics with R''' =Why Bother with R?= =Linear Regression= <source lang="r"> plot(cars) res=lm(dist ~ speed, data=cars) a…') |
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=Linear Regression= | =Linear Regression= | ||
| − | <source | + | <source> |
| − | plot(cars) | + | > plot(cars) |
| − | res=lm(dist ~ speed, data=cars) | + | > res=lm(dist ~ speed, data=cars) |
| − | abline(res) | + | > abline(res) |
</source> | </source> | ||
=Significance Testing= | =Significance Testing= | ||
| − | <source | + | <source> |
> boys_2=c(90.2, 91.4, 86.4, 87.6, 86.7, 88.1, 82.2, 83.8, 91, 87.4) | > boys_2=c(90.2, 91.4, 86.4, 87.6, 86.7, 88.1, 82.2, 83.8, 91, 87.4) | ||
> girls_2=c(83.8, 86.2, 85.1, 88.6, 83, 88.9, 89.7, 81.3, 88.7, 88.4) | > girls_2=c(83.8, 86.2, 85.1, 88.6, 83, 88.9, 89.7, 81.3, 88.7, 88.4) | ||
Revision as of 16:20, 19 June 2013
Open Source Statistics with R
Why Bother with R?
Linear Regression
> plot(cars)
> res=lm(dist ~ speed, data=cars)
> abline(res)Significance Testing
> boys_2=c(90.2, 91.4, 86.4, 87.6, 86.7, 88.1, 82.2, 83.8, 91, 87.4)
> girls_2=c(83.8, 86.2, 85.1, 88.6, 83, 88.9, 89.7, 81.3, 88.7, 88.4)
> res=var.test(boys_2,girls_2)
> res=t.test(boys_2, girls_2, var.equal=TRUE, paired=FALSE)