Displaying 20 results from an estimated 3000 matches similar to: "p-value from lm"
2009 Apr 05
4
extract the p value of F statistics from the lm class
Dear R users
I have run an regression and want to extract the p value of the F
statistics, but I can find a way to do that.
x<-summary(lm(log(RV2)~log(IV.m),data=b))
Call:
lm(formula = log(RV2) ~ log(IV.m), data = b[[11]])
Residuals:
Min 1Q Median 3Q Max
-0.26511 -0.09718 -0.01326 0.11095 0.29777
Coefficients:
Estimate Std. Error t value Pr(>|t|)
2010 Nov 29
1
extracting P values from lm model
Hello
I am trying to get out of an lm model the fstatistics, however after I run the model I write
> names(Model)
and the fstatistic does not appear only these.
names(Model)
[1] "coefficients" "residuals" "effects" "rank" "fitted.values"
[6] "assign" "qr" "df.residual"
2005 Dec 09
3
retrieving p-values in lm
Dear list,
I want to retrieve the p-value of a two-polynomial regression. For a
one-polynomial lm I can easily do this with:
summary(lm(b~a, data=c)[[4]][[8]].
But how do I find the final p-value in the two-polynomial regression? Under
$coefficients I don't find it
Any suggestions?
Patrick
alt <-(2260,2183,2189,1930,2435,
2000,2100,2050,2020,2470,
1700,2310,2090,1560,2060,
2008 Oct 31
3
getting the p-value from lm as a list object
Hi,
I'm trying to get the p-value from the 'lm' regression function as a list
object. For example, I can get r^2 from the following code by entering
summary(fm)$r.squared. Is there a way to get the p-value? If not, is there
a function where I can enter the f-value and degrees of freedom to get the
p-value? Thanks.
x <- c(1,2,3,4,5,6,7,8,9,10)
y <- c(1,2,3,4,4,5,6,8,1,9)
fm
2009 Oct 13
2
Linear Regression Question
Dear Sir or Madam,
I am a student at MSc Probability and Finance at Paris 6 University/
Ecole Polytechnique. I am using R and I can't find an answer to the
following question. I will be very thankful if you can answer it.
I have two vectors rendements_CAC40 and rendements_AlcatelLucent.
I use the lm function as follows, and then the sumarry function:
regression=lm(rendements_CAC40 ~
2011 Oct 31
1
Significance of trend
Hi everyone,
I'm trying to determine the significance of a trendline. From my internet
search months ago, I came across the following post. I modified tim and
dat for simiplicity.
tim <- 1:10
dat <- c(0.17, 1.09 ,0.11, 0.82, 0.23, 0.38 ,2.47 ,0.41 ,0.75, 1.44)
fstat <- summary(lm(dat~tim))$fstatistic
p.val <-
2012 Jun 05
1
nls: how do you know if the model is significant?
Hi all,
I'm struggling with nls. How do you know if your model is significant? For a
lm, you get a p-value, but you don't get it for a nls. Is there a way to
calculate it?
For a lm I use this:
a<-summary(lm(model ~obs))
f.stat<-a$fstatistic
p.value<-1-pf(f.stat["value"],f.stat["numdf"],f.stat["dendf"])
Is there something similar for a nls?
2012 Oct 23
2
Export summary from regression output
Hi there,
I tried it many times but didn't get it worked.
I just want to export the summary of a OLS regression (lm() function) into a
csv-file including the "call"-formula", "coefficients", "r-squared", "
adjusted r-squared" and "f statistic".
I know I can export:
write.csv2(Regression_60d_ann$coefficients,
2003 Jul 07
1
P-value for F from summary.lm (was RE: (no subject))
[Please use the subject line!]
In the help page for summary.lm, the "Value" section says that the returned
object has a component called "fstatistic", which has the F-statistic and
the associated numerator and denominator degrees of freedom. You can get
the p-value by something like:
fstat <- summary(speciallinearmodel)$fstatistic
pval <- pf(fstat[1], fstat[2],
2010 Apr 26
1
Error in pf(q, df1, df2, lower.tail, log.p) : Non-numeric argument to mathematical function
inputfille
snpid indid genotype gvariable probeid gene geneexpression
rs1040480 CHB_NA18524 C/T 2 GI_19743926-I PTPRT 5.850586
rs1040480 CHB_NA18526 C/C 1 GI_19743926-I PTPRT 6.028641
rs1040480 CHB_NA18529 C/C 3 GI_19743926-I PTPRT 5.944392
rs1040481 CHB_NA18532 C/C 1 GI_19743926-I PTPRT 5.938578
rs1040481 CHB_NA18537 C/C 2 GI_19743926-I PTPRT 5.874439
rs1040481 CHB_NA18540 C/C 3 GI_19743926-I
2005 Apr 04
1
Object item extraction
Hello
I am able to extract partial regression coefficients from a fitted model
object "model", i.e.
model <- lm(var.sel.gkm, weights = count.gkm, data = DATA)
summary(model)
write.table(model$coef, file = "C:/coef_CO_gkm.txt", row.names = TRUE,
col.names = TRUE)
I was wondering if anyone could advise me how to extract other object
items such as std. error, t-values
2006 Feb 23
2
Strange p-level for the fixed effect with lme function
Hello,
I ran two lme analyses and got expected results. However, I saw
something suspicious regarding p-level for fixed effect. Models are the
same, only experimental designs differ and, of course, subjects. I am
aware that I could done nesting Subjects within Experiments, but it is
expected to have much slower RT (reaction time) in the second
experiment, since the task is more complex, so it
2008 Jul 07
3
A quick question about lm()
I have a simple regression using lm().
If I just want to check the coefficient, I can use summary(lm())$coef; if I
need the standard error, I can use summary(lm())$s, if I need the residuals,
I can use summary(lm())$res. OK. How can I get the R-squares and Adjusted
R-squares using $...?
Is there a function, like objects(), that can show all the references for
values?
Thanks a lot!
--
View this
2011 Sep 28
2
apply lm function to dataset split by two variables
Dear all,
I am not fluent in R and am struggling to 1) apply a lm to a weight-size
dataset, thus the model has to run separately for each species, each
year; 2) extract coefs, r-squared, n, etc. The data look like this:
year sps cm w
2009 50 16 22
2009 50 17 42
2009 50 18 45
2009 51 15 45
2009 51 16 53
2009 51 17 73
2010 50 15 22
2010 50 16 41
2010 50 16 21
2010
2007 May 21
3
need some help please
We currently had dovecote 99 running and ran into some issues with it,
mainly our pop3 sessions timeout and were slow.
I upgraded to the latest version and im serving imap with pop3 using pam.
Heres my pam file:
[root at pop etc]# cat /etc/pam.d/dovecot
#%PAM-1.0
auth required pam_unix.so nullok
account required pam_unix.so
The problem I'm having is I can authenticate to
2011 Dec 22
2
Decoding only a certain frame results in different values than when decoding the entire file
To make it complete, here is the code that I am using to encode a large
file:
int __stdcall SpxEncode(unsigned char* inBuf, unsigned char* outBuf,
unsigned int inlen)
{
//char *testFile;
//FILE *ftest;
//testFile = "test";
//ftest = fopen(testFile, "wb");
//fwrite(inBuf,1,inlen,ftest);
//take every 320 bytes
//copy every short to float
2011 Apr 03
2
converting "call" objects into character
Dear all,
I would like to log the calls to my functions. I am trying to do this using the function match.call():
fTest<-function(x)
{
theCall<-match.call()
print(theCall)
return(x)
}
> fTest(2)
fTest(x = 2)
[1] 2
I can see "theCall" printed into the console, but I don't manage to convert it into a character to write it into a log file
2017 Jun 20
1
Fortran programs not writing stdout on windows
A user has reported an issue that appears when a fortran executable is
called via R on Windows. I am unsure if this expected behavior or a
bug in Fortran or in how R calls Windows executables.
The problem is that when the fortran program is called from R, stdout
gets written to a file "fort.6" instead of stdout. When the same
executable is called from the terminal it works fine and
2008 Dec 13
2
weird pasting of ".value" when list is returned
could someone explain why the name of FPVAL gets " .value" concatenated
onto it when the code below is run and temp is returned.
I've been trying to figure this out for too long. It doesn't matter when
I put the FPVAL in the return statement. It happens regardless of
whether it's first or last. Thanks.
f.lmmultenhanced <-
function(response, pred1, pred2)
{
2010 Dec 02
2
How to call R-squared values from lm's?
I would like to call both p-values and R-squared values from lm's in a function. I can get the p-values from coef(summary(name.lm))[r,c], however, I cannot figure out how to call the R-squared values without manually calling the summary and inserting them in the script - which negates the value of automating the process through a function.
Thanks,
Mike
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