10 Feb
2007
10 Feb
'07
9:48 a.m.
Hi all,
we have slightly changed the last part of the problem set to make
it a little bit easier for those of you who haven't used R
before. The question now reads:
"Randomly draw 100 datasets with 50 observations each from the
dataset in part (b)
with replacement (e.g. allowing the same row to be drawn multiple
times for a single
dataset) using sample(). Estimate the same regression as in (b)
for each of the 100
datasets using lm() and either a for() loop or the apply()
function. Report the
means and standard deviations of the beta estimates over all 100
datasets in the form
of a nicely formatted table."
The problem set on the website has also been updated (but you
might have to hit the reload button in your browser to get to see
the new version).
Holger
--
Holger Lutz Kern
Graduate Student
Department of Government
Cornell University
Institute for Quantitative Social Science
Harvard University
1737 Cambridge Street N350
Cambridge, MA 02138
www.people.cornell.edu/pages/hlk23
10 Feb
10 Feb
11:50 a.m.
Is anyone else getting the following error message when they try to load
the data for the homework? If so, do you know what it means?
load(url("http://isites.harvard.edu/fs/docs/icb.topic137586.files/Prob…
Holger Lutz Kern wrote:
data
Error in data.frame(y = c("-0.1328318193", "
1.7342160480"), x1 = c("
3.9920993", :
row names contain missing values
In addition: Warning message:
corrupt data frame: columns will be truncated or padded with NAs in:
format.data.frame(x, digits = digits, na.encode = FALSE)
Hi all,
we have slightly changed the last part of the problem set to make
it a little bit easier for those of you who haven't used R
before. The question now reads:
"Randomly draw 100 datasets with 50 observations each from the
dataset in part (b)
with replacement (e.g. allowing the same row to be drawn multiple
times for a single
dataset) using sample(). Estimate the same regression as in (b)
for each of the 100
datasets using lm() and either a for() loop or the apply()
function. Report the
means and standard deviations of the beta estimates over all 100
datasets in the form
of a nicely formatted table."
The problem set on the website has also been updated (but you
might have to hit the reload button in your browser to get to see
the new version).
Holger
11:53 a.m.
Matt,
please try saving it to your working directory and opening it
from there using load().
Holger
Matt Chingos wrote:
Is anyone else getting the following error message
when they try to load
the data for the homework? If so, do you know what it means?
load(url("http://isites.harvard.edu/fs/docs/icb.topic137586.files/Prob…
Holger Lutz Kern wrote:
--
Holger Lutz Kern
Graduate Student
Department of Government
Cornell University
Institute for Quantitative Social Science
Harvard University
1737 Cambridge Street N350
Cambridge, MA 02138
www.people.cornell.edu/pages/hlk23
data
Error in data.frame(y = c("-0.1328318193", "
1.7342160480"), x1 = c("
3.9920993", :
row names contain missing values
In addition: Warning message:
corrupt data frame: columns will be truncated or padded with NAs in:
format.data.frame(x, digits = digits, na.encode = FALSE)
Hi all,
we have slightly changed the last part of the problem set to make
it a little bit easier for those of you who haven't used R
before. The question now reads:
"Randomly draw 100 datasets with 50 observations each from the
dataset in part (b)
with replacement (e.g. allowing the same row to be drawn multiple
times for a single
dataset) using sample(). Estimate the same regression as in (b)
for each of the 100
datasets using lm() and either a for() loop or the apply()
function. Report the
means and standard deviations of the beta estimates over all 100
datasets in the form
of a nicely formatted table."
The problem set on the website has also been updated (but you
might have to hit the reload button in your browser to get to see
the new version).
Holger
_______________________________________________
gov2001-l mailing list
gov2001-l at lists.fas.harvard.edu
http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l
11:58 a.m.
Same error message:
Holger Lutz Kern wrote:
> Matt,
>
> please try saving it to your working directory and opening it
> from there using load().
>
> Holger
>
>
>
> Matt Chingos wrote:
>> Is anyone else getting the following error message when they try to load
>> the data for the homework? If so, do you know what it means?
>>
>> >
>>
load(url("http://isites.harvard.edu/fs/docs/icb.topic137586.files/Prob…
>> >> >>
>>
>> Holger Lutz Kern wrote:
>>> Hi all,
>>>
>>> we have slightly changed the last part of the problem set to make
>>> it a little bit easier for those of you who haven't used R
>>> before. The question now reads:
>>>
>>> "Randomly draw 100 datasets with 50 observations each from the
>>> dataset in part (b)
>>> with replacement (e.g. allowing the same row to be drawn multiple
>>> times for a single
>>> dataset) using sample(). Estimate the same regression as in (b)
>>> for each of the 100
>>> datasets using lm() and either a for() loop or the apply()
>>> function. Report the
>>> means and standard deviations of the beta estimates over all 100
>>> datasets in the form
>>> of a nicely formatted table."
>>>
>>> The problem set on the website has also been updated (but you
>>> might have to hit the reload button in your browser to get to see
>>> the new version).
>>>
>>>
>>> Holger
>>>
>>>
>> _______________________________________________
>> gov2001-l mailing list
>> gov2001-l at lists.fas.harvard.edu
>> http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l
>
load("C:/Documents and Settings/Matt/My
Documents/Courses/Gov
2001/data_ps1.RData")
ls()
[1] "data"
data
Error in data.frame(y =
c("-0.1328318193", " 1.7342160480"), x1 = c("
3.9920993", :
row names contain missing values
In addition: Warning message:
corrupt data frame: columns will be truncated or padded with NAs in:
format.data.frame(x, digits = digits, na.encode = FALSE)
data
>> Error in data.frame(y =
c("-0.1328318193", " 1.7342160480"), x1 = c("
>> 3.9920993", :
>> row names contain missing values
>> In addition: Warning message:
>> corrupt data frame: columns will be truncated or padded with NAs in:
>> format.data.frame(x, digits = digits, na.encode = FALSE)
>>
noon
Matt,
what R version and operating system do you use? It loads
semlessly on my Windows machine with R 2.4.1.
Holger
Matt Chingos wrote:
Same error message:
Holger Lutz Kern wrote:
> Matt,
>
> please try saving it to your working directory and opening it
> from there using load().
>
> Holger
>
>
>
> Matt Chingos wrote:
>> Is anyone else getting the following error message when they try to load
>> the data for the homework? If so, do you know what it means?
>>
>> >
>>
load(url("http://isites.harvard.edu/fs/docs/icb.topic137586.files/Prob…
>> >> >>
>>
>> Holger Lutz Kern wrote:
>>> Hi all,
>>>
>>> we have slightly changed the last part of the problem set to make
>>> it a little bit easier for those of you who haven't used R
>>> before. The question now reads:
>>>
>>> "Randomly draw 100 datasets with 50 observations each from the
>>> dataset in part (b)
>>> with replacement (e.g. allowing the same row to be drawn multiple
>>> times for a single
>>> dataset) using sample(). Estimate the same regression as in (b)
>>> for each of the 100
>>> datasets using lm() and either a for() loop or the apply()
>>> function. Report the
>>> means and standard deviations of the beta estimates over all 100
>>> datasets in the form
>>> of a nicely formatted table."
>>>
>>> The problem set on the website has also been updated (but you
>>> might have to hit the reload button in your browser to get to see
>>> the new version).
>>>
>>>
>>> Holger
>>>
>>>
>> _______________________________________________
>> gov2001-l mailing list
>> gov2001-l at lists.fas.harvard.edu
>> http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l
_______________________________________________
gov2001-l mailing list
gov2001-l at lists.fas.harvard.edu
http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l
--
Holger Lutz Kern
Graduate Student
Department of Government
Cornell University
Institute for Quantitative Social Science
Harvard University
1737 Cambridge Street N350
Cambridge, MA 02138
www.people.cornell.edu/pages/hlk23
load("C:/Documents and Settings/Matt/My
Documents/Courses/Gov
2001/data_ps1.RData")
ls()
[1] "data"
data
Error in data.frame(y =
c("-0.1328318193", " 1.7342160480"), x1 = c("
3.9920993", :
row names contain missing values
In addition: Warning message:
corrupt data frame: columns will be truncated or padded with NAs in:
format.data.frame(x, digits = digits, na.encode = FALSE)
data
>> Error in data.frame(y = c("-0.1328318193",
" 1.7342160480"), x1 = c("
>> 3.9920993", :
>> row names contain missing values
>> In addition: Warning message:
>> corrupt data frame: columns will be truncated or padded with NAs in:
>> format.data.frame(x, digits = digits, na.encode = FALSE)
>>
12:03 p.m.
Windows, with version 2.3.1
Holger Lutz Kern wrote:
Matt,
what R version and operating system do you use? It loads
semlessly on my Windows machine with R 2.4.1.
Holger
Matt Chingos wrote:
Same error message:
Holger Lutz Kern wrote:
> Matt,
>
> please try saving it to your working directory and opening it
> from there using load().
>
> Holger
>
>
>
> Matt Chingos wrote:
>> Is anyone else getting the following error message when they try to load
>> the data for the homework? If so, do you know what it means?
>>
>> >
>>
load(url("http://isites.harvard.edu/fs/docs/icb.topic137586.files/Prob…
>> >> >>
>>
>> Holger Lutz Kern wrote:
>>> Hi all,
>>>
>>> we have slightly changed the last part of the problem set to make
>>> it a little bit easier for those of you who haven't used R
>>> before. The question now reads:
>>>
>>> "Randomly draw 100 datasets with 50 observations each from the
>>> dataset in part (b)
>>> with replacement (e.g. allowing the same row to be drawn multiple
>>> times for a single
>>> dataset) using sample(). Estimate the same regression as in (b)
>>> for each of the 100
>>> datasets using lm() and either a for() loop or the apply()
>>> function. Report the
>>> means and standard deviations of the beta estimates over all 100
>>> datasets in the form
>>> of a nicely formatted table."
>>>
>>> The problem set on the website has also been updated (but you
>>> might have to hit the reload button in your browser to get to see
>>> the new version).
>>>
>>>
>>> Holger
>>>
>>>
>> _______________________________________________
>> gov2001-l mailing list
>> gov2001-l at lists.fas.harvard.edu
>> http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l
_______________________________________________
gov2001-l mailing list
gov2001-l at lists.fas.harvard.edu
http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l
load("C:/Documents and Settings/Matt/My
Documents/Courses/Gov
2001/data_ps1.RData")
ls()
[1] "data"
data
Error in data.frame(y =
c("-0.1328318193", " 1.7342160480"), x1 = c("
3.9920993", :
row names contain missing values
In addition: Warning message:
corrupt data frame: columns will be truncated or padded with NAs in:
format.data.frame(x, digits = digits, na.encode = FALSE)
data
>> Error in data.frame(y = c("-0.1328318193",
" 1.7342160480"), x1 = c("
>> 3.9920993", :
>> row names contain missing values
>> In addition: Warning message:
>> corrupt data frame: columns will be truncated or padded with NAs in:
>> format.data.frame(x, digits = digits, na.encode = FALSE)
>>
12:06 p.m.
Matt, and everyone else, please update to R version 2.4.1. Saved
objects apparently are not compatible with older versions of R,
and using an older version of R will also cause problems with
libraries compiled under newer R versions.
Holger
Matt Chingos wrote:
Windows, with version 2.3.1
Holger Lutz Kern wrote:
--
Holger Lutz Kern
Graduate Student
Department of Government
Cornell University
Institute for Quantitative Social Science
Harvard University
1737 Cambridge Street N350
Cambridge, MA 02138
www.people.cornell.edu/pages/hlk23
Matt,
what R version and operating system do you use? It loads
semlessly on my Windows machine with R 2.4.1.
Holger
Matt Chingos wrote:
> Same error message:
>
> > load("C:/Documents and Settings/Matt/My Documents/Courses/Gov
> 2001/data_ps1.RData")
> > ls()
> [1] "data"
> > data
> Error in data.frame(y = c("-0.1328318193", " 1.7342160480"), x1 =
c("
> 3.9920993", :
> row names contain missing values
> In addition: Warning message:
> corrupt data frame: columns will be truncated or padded with NAs in:
> format.data.frame(x, digits = digits, na.encode = FALSE)
> >
>
>
> Holger Lutz Kern wrote:
>> Matt,
>>
>> please try saving it to your working directory and opening it
>> from there using load().
>>
>> Holger
>>
>>
>>
>> Matt Chingos wrote:
>>> Is anyone else getting the following error message when they try to load
>>> the data for the homework? If so, do you know what it means?
>>>
>>> >
>>>
load(url("http://isites.harvard.edu/fs/docs/icb.topic137586.files/Prob…
>>> >
>>> > data
>>> Error in data.frame(y = c("-0.1328318193", "
1.7342160480"), x1 = c("
>>> 3.9920993", :
>>> row names contain missing values
>>> In addition: Warning message:
>>> corrupt data frame: columns will be truncated or padded with NAs in:
>>> format.data.frame(x, digits = digits, na.encode = FALSE)
>>> >
>>>
>>>
>>> Holger Lutz Kern wrote:
>>>> Hi all,
>>>>
>>>> we have slightly changed the last part of the problem set to make
>>>> it a little bit easier for those of you who haven't used R
>>>> before. The question now reads:
>>>>
>>>> "Randomly draw 100 datasets with 50 observations each from the
>>>> dataset in part (b)
>>>> with replacement (e.g. allowing the same row to be drawn multiple
>>>> times for a single
>>>> dataset) using sample(). Estimate the same regression as in (b)
>>>> for each of the 100
>>>> datasets using lm() and either a for() loop or the apply()
>>>> function. Report the
>>>> means and standard deviations of the beta estimates over all 100
>>>> datasets in the form
>>>> of a nicely formatted table."
>>>>
>>>> The problem set on the website has also been updated (but you
>>>> might have to hit the reload button in your browser to get to see
>>>> the new version).
>>>>
>>>>
>>>> Holger
>>>>
>>>>
>>> _______________________________________________
>>> gov2001-l mailing list
>>> gov2001-l at lists.fas.harvard.edu
>>> http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l
> _______________________________________________
> gov2001-l mailing list
> gov2001-l at lists.fas.harvard.edu
> http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l
_______________________________________________
gov2001-l mailing list
gov2001-l at lists.fas.harvard.edu
http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l 
12:15 p.m.
New subject: [gov2001-l] How to use Xemacs and R
Hey Everyone,
A question has come up about how to use R in xemacs (on the server). Here
is what I do when writing code,
First, I open up a terminal (red hat in the corner, system tools,
terminal). Then I open up an Xemacs window, with a *.R title. For
example, let's say I'm working on problem set 1, I'd write the following
line of code in the terminal,
xemacs pset1.R &
the "&" ensures that you can run other files when you have this xemacs
open. Now, what you have open is analagous to the "do" file in stata--but
even better. Xemacs will check to see if you have any missing parantheses
and will add color to your code to make writing it easier.
To open up R, requires a little bit of manual dexterity. With the cursor
in the xemacs window, type
'esc-x' then 'shift-R'
If this works, you'll have to hit 'enter' and then the screen should split
into two buffers, the top will be the do file and the bottom with be the
actual R execution window.
To get the code from the top buffer to the execution line is also easy.
The blue arrow pointing to the right, with a single line underneath
executes one line. If you want to highlight a number of lines to run at
once, first highlight those lines, then press the blue arrow pointing
right with three lines underneath that.
In the computing section we have a number of "cheat sheets" or great
pieces of code to speed up the process of learning, R, unix, and latex.
Check out this link for the xemacs (under emacs) in the computing folder
http://isites.harvard.edu/fs/docs/icb.topic105357.files/Emacs/Emacsrefcard.…
Lastly, if you have any questions, please do not hesistate to send them to
the list
Justin
12:06 p.m.
Matt,
Please go to
http://www.r-project.org/
and download R.2.4.1, this should eliminate the problem,
Justin
On Sat, 10 Feb 2007, Matt Chingos wrote:
Windows, with version 2.3.1
Holger Lutz Kern wrote:
Matt,
what R version and operating system do you use? It loads
semlessly on my Windows machine with R 2.4.1.
Holger
Matt Chingos wrote:
_______________________________________________
gov2001-l mailing list
gov2001-l at lists.fas.harvard.edu
http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l
Same error message:
Holger Lutz Kern wrote:
> Matt,
>
> please try saving it to your working directory and opening it
> from there using load().
>
> Holger
>
>
>
> Matt Chingos wrote:
>> Is anyone else getting the following error message when they try to load
>> the data for the homework? If so, do you know what it means?
>>
>> >
>>
load(url("http://isites.harvard.edu/fs/docs/icb.topic137586.files/Prob…
>> >> >>
>>
>> Holger Lutz Kern wrote:
>>> Hi all,
>>>
>>> we have slightly changed the last part of the problem set to make
>>> it a little bit easier for those of you who haven't used R
>>> before. The question now reads:
>>>
>>> "Randomly draw 100 datasets with 50 observations each from the
>>> dataset in part (b)
>>> with replacement (e.g. allowing the same row to be drawn multiple
>>> times for a single
>>> dataset) using sample(). Estimate the same regression as in (b)
>>> for each of the 100
>>> datasets using lm() and either a for() loop or the apply()
>>> function. Report the
>>> means and standard deviations of the beta estimates over all 100
>>> datasets in the form
>>> of a nicely formatted table."
>>>
>>> The problem set on the website has also been updated (but you
>>> might have to hit the reload button in your browser to get to see
>>> the new version).
>>>
>>>
>>> Holger
>>>
>>>
>> _______________________________________________
>> gov2001-l mailing list
>> gov2001-l at lists.fas.harvard.edu
>> http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l
_______________________________________________
gov2001-l mailing list
gov2001-l at lists.fas.harvard.edu
http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l
load("C:/Documents and Settings/Matt/My
Documents/Courses/Gov
2001/data_ps1.RData")
ls()
[1] "data"
data
Error in data.frame(y =
c("-0.1328318193", " 1.7342160480"), x1 = c(" > >>
3.9920993", :
row names contain missing values
In addition: Warning message:
corrupt data frame: columns will be truncated or padded with NAs in:
format.data.frame(x, digits = digits, na.encode = FALSE)
data
>> Error in data.frame(y = c("-0.1328318193",
" 1.7342160480"), x1 = c("
>> 3.9920993", :
>> row names contain missing values
>> In addition: Warning message:
>> corrupt data frame: columns will be truncated or padded with NAs in:
>> format.data.frame(x, digits = digits, na.encode = FALSE)
>>
12:13 p.m.
Should I uninstall the old version first? Also, is this going to screw
up how WinEdt and R work together on my computer?
Justin Ryan Grimmer wrote:
Matt,
Please go to
http://www.r-project.org/
and download R.2.4.1, this should eliminate the problem,
Justin
On Sat, 10 Feb 2007, Matt Chingos wrote:
Windows, with version 2.3.1
Holger Lutz Kern wrote:
_______________________________________________
gov2001-l mailing list
gov2001-l at lists.fas.harvard.edu
http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l
Matt,
what R version and operating system do you use? It loads
semlessly on my Windows machine with R 2.4.1.
Holger
Matt Chingos wrote:
> Same error message:
>
> > load("C:/Documents and Settings/Matt/My Documents/Courses/Gov
> 2001/data_ps1.RData")
> > ls()
> [1] "data"
> > data
> Error in data.frame(y = c("-0.1328318193", " 1.7342160480"), x1 =
c(" > >> 3.9920993", :
> row names contain missing values
> In addition: Warning message:
> corrupt data frame: columns will be truncated or padded with NAs in:
> format.data.frame(x, digits = digits, na.encode = FALSE)
> >
>
>
> Holger Lutz Kern wrote:
>> Matt,
>>
>> please try saving it to your working directory and opening it
>> from there using load().
>>
>> Holger
>>
>>
>>
>> Matt Chingos wrote:
>>> Is anyone else getting the following error message when they try to load
>>> the data for the homework? If so, do you know what it means?
>>>
>>> >
>>>
load(url("http://isites.harvard.edu/fs/docs/icb.topic137586.files/Prob…
>>> >
>>> > data
>>> Error in data.frame(y = c("-0.1328318193", "
1.7342160480"), x1 = c("
>>> 3.9920993", :
>>> row names contain missing values
>>> In addition: Warning message:
>>> corrupt data frame: columns will be truncated or padded with NAs in:
>>> format.data.frame(x, digits = digits, na.encode = FALSE)
>>> >
>>>
>>>
>>> Holger Lutz Kern wrote:
>>>> Hi all,
>>>>
>>>> we have slightly changed the last part of the problem set to make
>>>> it a little bit easier for those of you who haven't used R
>>>> before. The question now reads:
>>>>
>>>> "Randomly draw 100 datasets with 50 observations each from the
>>>> dataset in part (b)
>>>> with replacement (e.g. allowing the same row to be drawn multiple
>>>> times for a single
>>>> dataset) using sample(). Estimate the same regression as in (b)
>>>> for each of the 100
>>>> datasets using lm() and either a for() loop or the apply()
>>>> function. Report the
>>>> means and standard deviations of the beta estimates over all 100
>>>> datasets in the form
>>>> of a nicely formatted table."
>>>>
>>>> The problem set on the website has also been updated (but you
>>>> might have to hit the reload button in your browser to get to see
>>>> the new version).
>>>>
>>>>
>>>> Holger
>>>>
>>>>
>>> _______________________________________________
>>> gov2001-l mailing list
>>> gov2001-l at lists.fas.harvard.edu
>>> http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l
> _______________________________________________
> gov2001-l mailing list
> gov2001-l at lists.fas.harvard.edu
> http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l
_______________________________________________
gov2001-l mailing list
gov2001-l at lists.fas.harvard.edu
http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l
12:16 p.m.
Matt,
I *think* you can have several R versions installed at the same
time. I don't use WinEdt together with R, so I can't make any
predictions about what will happen. Maybe someone else knows?
Holger
Matt Chingos wrote:
Should I uninstall the old version first? Also, is
this going to screw
up how WinEdt and R work together on my computer?
Justin Ryan Grimmer wrote:
--
Holger Lutz Kern
Graduate Student
Department of Government
Cornell University
Institute for Quantitative Social Science
Harvard University
1737 Cambridge Street N350
Cambridge, MA 02138
www.people.cornell.edu/pages/hlk23
Matt,
Please go to
http://www.r-project.org/
and download R.2.4.1, this should eliminate the problem,
Justin
On Sat, 10 Feb 2007, Matt Chingos wrote:
_______________________________________________
gov2001-l mailing list
gov2001-l at lists.fas.harvard.edu
http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l Windows, with version 2.3.1
Holger Lutz Kern wrote:
_______________________________________________
gov2001-l mailing list
gov2001-l at lists.fas.harvard.edu
http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l
Matt,
what R version and operating system do you use? It loads
semlessly on my Windows machine with R 2.4.1.
Holger
Matt Chingos wrote:
> Same error message:
>
> > load("C:/Documents and Settings/Matt/My Documents/Courses/Gov
> 2001/data_ps1.RData")
> > ls()
> [1] "data"
> > data
> Error in data.frame(y = c("-0.1328318193", " 1.7342160480"), x1 =
c(" > >> 3.9920993", :
> row names contain missing values
> In addition: Warning message:
> corrupt data frame: columns will be truncated or padded with NAs in:
> format.data.frame(x, digits = digits, na.encode = FALSE)
> >
>
>
> Holger Lutz Kern wrote:
>> Matt,
>>
>> please try saving it to your working directory and opening it
>> from there using load().
>>
>> Holger
>>
>>
>>
>> Matt Chingos wrote:
>>> Is anyone else getting the following error message when they try to load
>>> the data for the homework? If so, do you know what it means?
>>>
>>> >
>>>
load(url("http://isites.harvard.edu/fs/docs/icb.topic137586.files/Prob…
>>> >
>>> > data
>>> Error in data.frame(y = c("-0.1328318193", "
1.7342160480"), x1 = c("
>>> 3.9920993", :
>>> row names contain missing values
>>> In addition: Warning message:
>>> corrupt data frame: columns will be truncated or padded with NAs in:
>>> format.data.frame(x, digits = digits, na.encode = FALSE)
>>> >
>>>
>>>
>>> Holger Lutz Kern wrote:
>>>> Hi all,
>>>>
>>>> we have slightly changed the last part of the problem set to make
>>>> it a little bit easier for those of you who haven't used R
>>>> before. The question now reads:
>>>>
>>>> "Randomly draw 100 datasets with 50 observations each from the
>>>> dataset in part (b)
>>>> with replacement (e.g. allowing the same row to be drawn multiple
>>>> times for a single
>>>> dataset) using sample(). Estimate the same regression as in (b)
>>>> for each of the 100
>>>> datasets using lm() and either a for() loop or the apply()
>>>> function. Report the
>>>> means and standard deviations of the beta estimates over all 100
>>>> datasets in the form
>>>> of a nicely formatted table."
>>>>
>>>> The problem set on the website has also been updated (but you
>>>> might have to hit the reload button in your browser to get to see
>>>> the new version).
>>>>
>>>>
>>>> Holger
>>>>
>>>>
>>> _______________________________________________
>>> gov2001-l mailing list
>>> gov2001-l at lists.fas.harvard.edu
>>> http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l
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chingos＠fas.harvard.edu -
hlk23＠cornell.edu -
jgrimmer＠fas.harvard.edu