Winsemius <dwinsem...@comcast.net> wrote:
>
>
>> On Dec 19, 2016, at 1:47 PM, Mauricio Cornejo via R-help
>> <r-help@r-project.org> wrote:
>>
>> Is there a function similar to stats::power.t.test that can handle unequal
>> variances from two
lesize do
what you need/want.
Hth -- Gerrit
> On Dec 19, 2016, at 1:47 PM, Mauricio Cornejo via R-help
> <r-help@r-project.org> wrote:
>
> Is there a function similar to stats::power.t.test that can handle unequal
> variances from two samples?
> I noticed that
Is there a function similar to stats::power.t.test that can handle unequal
variances from two samples?
I noticed that stats::t.test has an argument for indicating whether or not to
treat the two sample variances as equal. Wondering why stats::power.t.test
doesn’t have that option.
Hi
After launching newly-installed R 3.2.1 (on Windows 7), I run the following two
commands:
getwd()[1] C:/ProgramData/Microsoft/Windows/Start Menu/Programs/R
Sys.getenv('R_USER')[1] C:\\Users\\my username\\Documents
I would like the startup working directory to be that pointed to by R_USER.
I
Hello,
Is there a way to set the maximum width of character columns when printing a
data frame?
I've looked into print(), format(), and options() and have been unsuccessful.
For example, I'd like to achieve the results below without having to modify the
data itself.
x -
AM, Mauricio Cornejo wrote:
Hello,
Is there a way to set the maximum width of character columns when printing a
data frame?
I've looked into print(), format(), and options() and have been unsuccessful.
For example, I'd like to achieve the results below without having to modify
Can anyone explain (perhaps with an example) why the R Language Definitions
(Version 2.15.2, 2012-10-26, DRAFT) says the following in section 3.2.6?
To choose from a list of alternatives that already exists switch() may not be
the best way to select one for evaluation. It is often better to
Hello,
After reading help file, various threads on this board, and other online
tutorials, I've attempted to use gsub (using Perl-like syntax) to change a
currency string into something that can be converted to numeric type using only
one regular expression. Can anybody point out my error?
Arun, thanks for both of your suggestions.
I played with your second idea some more and seemed to have found a more
general solution (If not a digit nor period then replace with blank).
x - \$ 1,200,300,400.50\
gsub([^0-9|.], , x, perl=TRUE)
[1] 1200300400.50
Regards,
Mauricio
William, David, and Peter,
Thank you all so much for your help on this. Though I had read the help files
on 'subset' and '[', I had not been able to discern from that text what the
problem was. I could not have solved it without your help.
The help file on 'subset' mentions For ordinary
on logical variable
On 2012-08-28 07:44, Mauricio Cornejo wrote:
William, David, and Peter,
Thank you all so much for your help on this. Though I had read the help
files on 'subset' and '[', I had not been able to discern from that text what
the problem was. I could not have solved it without your
Hi,
Would anyone have any idea as to why I would obtain completely different
results when subsetting using the subset function vs bracket notation?
I have a data frame with 65 variables and 4382 rows. When I use execute the
following subset command I get the correct results (125 rows)
Hello,
I'm trying to figure out how to find the index of the second occurrence of /
in a string (which happens to represent a date) within a data frame column.
I've used the following code successfully to find the first instance of /.
dframe - data.frame(date=c(5/14/2011, 4/7/2011))
dframe$x1
, Mauricio Cornejo
Hello,
I'm trying to figure out how to find the index of the second occurrence of
/ in a string (which happens to represent a date) within a data frame
column.
I've used the following code successfully to find the first instance of /.
dframe - data.frame(date=c(5/14/2011
Hello,
I'm wondering if the 'mosaic' plot of the vcd package (or any other function
for that matter) can be used with a continuous variable that should be
represented via various categorical variables. All the documentation I've read
lead me to believe that it only works with counts of
-project.org r-help@r-project.org
Sent: Wednesday, September 14, 2011 1:45 PM
Subject: Re: [R] Can 'mosaic' be used with a continuous variable?
On Wed, 14 Sep 2011, Mauricio Cornejo wrote:
Hello,
I'm wondering if the 'mosaic' plot of the vcd package (or any other function
for that matter) can
choice, Choice 2=My 2nd choice, Choice
3=My 3rd choice)
[1] My 2nd choice
On Tue, Aug 16, 2011 at 4:53 PM, Mauricio Cornejo mauriciocorn...@yahoo.com
wrote:
Hi,
Does anyone know if the alternatives in the 'switch' function can be specified
as strings containing spaces? Neither
Hi,
Does anyone know if the alternatives in the 'switch' function can be specified
as strings containing spaces? Neither of the two approaches below works.
switch(expr, Choice 1=My first choice, Choice 2=My 2nd choice, Choice
3=My 3rd choice)
x - c(Choice 1, Choice 2, Choice 3)
Hi,
I have a data frame with column names 1, 2, 3, ... and I'd like to
extract
a subset based on the values in the first column. None of the methods I tried
worked (below).
x - subset(dframe, 1 = = My Text)
x - subset(dframe, 1 = = My Text)
x - subset(dframe, names(dframe)[1] = = My Text)
Q
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