Hi Duncan,
Thanks for your help. I changed the P but the output that I get is not what
I expect. The form gets aborted without any actual output. I get the same
result with
postForm("http://www.expasy.ch/tools/protscale.html";)
just with an added message that there was no input passed on. But with the
input like I presented I get the same output. I could make some of the
examples work like for e.g
postForm("http://www.omegahat.org/RCurl/testPassword/form_validation.cgi";,
your_name = "Duncan",
your_age = "35-55",
your_sex = "m",
submit = "submit",
.opts = list(userpwd = "bob:welcome"))
which would suggest atleast the setup is correct.
I parsed the expasy protscale source code to identify the variables but the
form does not seem to go through. I can post the html body code if needed.
Regards
Sunando
On Fri, Feb 12, 2010 at 3:54 PM, Duncan Temple Lang <dun...@wald.ucdavis.edu
> wrote:
>
>
> Sunando Roy wrote:
> > Hi,
> >
> > I am trying to submit a form to the EXPASY protscale server (
> > http://www.expasy.ch/tools/protscale.html). I am using the RCurl package
> and
> > the postForm function available in it. I have extracted the variables for
> > the form from the HTML source page. According to the syntax of postForm,
> I
> > just need to mention the url and assign values to the input mentioned in
> the
> > HTML code.
> > The code that I am using is:
> > postForm("http://www.expasy.ch/tools/protscale.html";,
> > "sequence" = "
> > AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA",
> > scale = "Molecular weight",
> > window = "5",
> > weight_edges = "100",
> > weight_var = "linear",
> > norm = "no",
> > submit = "Submit"), .checkparams = TRUE)
>
>
> I don't think that is what you actually submitted to R.
> It is a syntax error as you end the cal to postForm) after "Submit"
> and then have an extra ", .checkparams = TRUE)" afterwards.
>
> But, when you remove the ')' after "Submit",
> the problem you get is that .checkparams is not a parameter
> of postForm(), but .checkParams is. R is case-sensitive
> so the problem is that .checkparams is being treated as a parameter
> of your form.
>
> So change the p to P in .checkparams, and it works.
>
> D.
>
> > the constant error that I get is:
> > Error in postForm("http://www.expasy.ch/tools/protscale.html";, .params =
> > list(sequence = "not", : STRING_ELT() can only be applied to a
> 'character
> > vector', not a 'logical'
> >
> > Is there any other way to submit an HTML form in R ?
> >
> > Thanks for the help
> >
> > Regards
> >
> > Sunando
> >
> > [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help@r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
>
[[alternative HTML version deleted]]
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