I'm getting the following error when trying to execute a glm() procedure:
Error in model.frame(formula, rownames, variables, varnames, extras,
extranames, :
invalid variable type for 'response'
The commands I'm using to import the *.csv files, construct the data frame,
and run the glm procedure are below:
response <- read.csv("Response.csv", header = TRUE, sep =
",")
seed <- read.csv("Seed.csv", header = TRUE, sep = ",")
data <- data.frame(seed, response)
model <- glm(response~seed, family=binomial(link=logit), data=data)
My Response.csv files look like this:
Response
0
0
1
...
My Seed.csv files look like this:
Seed
0.25
0.65
0.47
....
Thanks in advance for any help,
Brian
[[alternative HTML version deleted]]
The names of your variables are Response and Seed, not response and seed. The latter two are the names of your data frames. On 6/25/06, Brian Davenhall <bdavenhall at sbcglobal.net> wrote:> I'm getting the following error when trying to execute a glm() procedure: > > > > Error in model.frame(formula, rownames, variables, varnames, extras, > extranames, : > invalid variable type for 'response' > > > > The commands I'm using to import the *.csv files, construct the data frame, > and run the glm procedure are below: > > > > response <- read.csv("Response.csv", header = TRUE, sep = ",") > > seed <- read.csv("Seed.csv", header = TRUE, sep = ",") > > data <- data.frame(seed, response) > > model <- glm(response~seed, family=binomial(link=logit), data=data) > > > > My Response.csv files look like this: > > > > Response > > 0 > > 0 > > 1 > > ... > > > > My Seed.csv files look like this: > > > > Seed > > 0.25 > > 0.65 > > 0.47 > > .... > > > > Thanks in advance for any help, > > Brian > > > > > > > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html >
What are the names of 'data?' It looks like you intended the response to be data$Response and not the object response found in your workspace. If so, you need to capitalize your formula. (And what version of R is this? -- R-devel actually tells you the type in this error message, so we know it is not that.) BTW, 'data' is an R system object and you really should avoid using the name for your own data frames. Normally R works out what you mean, but this can be cause of hard-to-find errors. On Sun, 25 Jun 2006, Brian Davenhall wrote:> I'm getting the following error when trying to execute a glm() procedure: > > Error in model.frame(formula, rownames, variables, varnames, extras, > extranames, : > invalid variable type for 'response' > > The commands I'm using to import the *.csv files, construct the data frame, > and run the glm procedure are below: > > response <- read.csv("Response.csv", header = TRUE, sep = ",") > > seed <- read.csv("Seed.csv", header = TRUE, sep = ",") > > data <- data.frame(seed, response) > > model <- glm(response~seed, family=binomial(link=logit), data=data) > > > > My Response.csv files look like this: > > > > Response > > 0 > > 0 > > 1 > > ... > > > > My Seed.csv files look like this: > > > > Seed > > 0.25 > > 0.65 > > 0.47 > > .... > > > > Thanks in advance for any help, > > Brian > > > > > > > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html >-- Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595