# [R] data analysis. R

Dylan Beaudette dylan.beaudette at gmail.com
Sun Mar 22 05:12:56 CET 2009

```On Sat, Mar 21, 2009 at 5:13 PM, UBC <cheong0618 at hotmail.com> wrote:
>
> so i am having this question
> what should i do if the give data file (.txt) has 4 columns, but different
> lengths?
> how can i read them in R?
> any idea for the following problem?
>
>
> Gas consumption (1000 cubic feet) was measured before and after insulation
> was put into
> a house. We are interested in looking at the effect of insulation on gas
> consumption. The
> average outside temperature (degrees celcius) was also measured. The data
> are included in
> the file "insulation.txt".
>
> (a) Determine if insulation in the house effects the average gas
> consumption.
> (b) How much extra gas is used when there is no insulation? Provide an
> interval estimate
> as well as a point estimate.
>
> heres the content in "insulation.txt"  (u can just copy and paste it to the
>
> Before insul    After insul.
> temp    gas     temp    gas
> -0.8    7.2    -0.7    4.8
> -0.7    6.9    0.8    4.6
> 0.4    6.4    1.0    4.7
> 2.5    6.0    1.4    4.0
> 2.9    5.8    1.5    4.2
> 3.2    5.8    1.6    4.2
> 3.6    5.6    2.3    4.1
> 3.9    4.7    2.5    4.0
> 4.2    5.8    2.5    3.5
> 4.3    5.2    3.1    3.2
> 5.4    4.9    3.9    3.9
> 6.0    4.9    4.0    3.5
> 6.0    4.3    4.0    3.7
> 6.0    4.4    4.2    3.5
> 6.2    4.5    4.3    3.5
> 6.3    4.6    4.6    3.7
> 6.9    3.7    4.7    3.5
> 7.0    3.9    4.9    3.4
> 7.4    4.2    4.9    3.7
> 7.5    4.0    4.9    4.0
> 7.5    3.9    5.0    3.6
> 7.6    3.5    5.3    3.7
> 8.0    4.0    6.2    2.8
> 8.5    3.6    7.1    3.0
> 9.1    3.1    7.2    2.8
> 10.2  2.6    7.5    2.6
>                8.0    2.7
>                8.7    2.8
>                8.8    1.3
>                9.7    1.5
>
>
>
> thx and any ideas would help.

Dude- really? This is just a funky-format version of the whiteside
data found in the MASS package:

library(MASS)
whiteside

See the posting guide (http://www.r-project.org/posting-guide.html),
especially the section on homework questions.

```