Survfit returns an "Error in temp[, 1] : incorrect number of
dimensions" error message when I attempt to use newdata to validate my
models. The syntax I am using is "sfit <- survfit(mod1,
newdata=testd, individual=T)". The dataframe testd has two columns
and 39 rows (see below). The rows are th
The 'basehaz' function is just a wrapper for survfit, and includes only some of
the arguments of the former. It's main reason for existence is that another
more well known (but inferior :-) package uses that term.
I don't understand the final comment in the exchange, however:
> I had been hopi
Yes, Thank you. I did not separate the arguments for basehaz from
those for survfit in the documentation. I had been hoping the tedious
alignment of the baseline curve with the value of the variables in the
new data set would be [somehow] handled for me.
On Apr 7, 12:27 pm, "Austin, Matt" <[EMAI
l Leader, denosumab PMO
Biostatistics Director
Amgen, Inc
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of mah
Sent: Monday, April 07, 2008 10:01 AM
To: r-help@r-project.org
Subject: Re: [R] basehaz and newdata
Thanks Roland, but using data frames does not
Thanks Roland, but using data frames does not resolve the issue. See
revised code and output below:
> test1 <- data.frame(
+ time= c(4, 3,1,1,2,2,3),
+ status=c(1,NA,1,0,1,1,0),
+ x= c(0, 2,1,1,1,0,0),
+ sex= c(0, 0,0,0,1,1,1
Hi,
just looked at it briefly and I don't know if it is the real cause for
your problems. But 'data' as well as 'newdata' require a data.frame and
not a list as input.
Does this help?
Best,
Roland
mah wrote:
> I am unable to get the basehaz function to apply a proportional
> hazards model to
I am unable to get the basehaz function to apply a proportional
hazards model to a new data frame. I replicated my specific situation
with the example for coxph in the help, where I changed the x value of
the first record from 0 to 1. Is there something incorrect in the
syntax that I am using? T
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