Try this:

i<-1
sqlcmd_ScaffLen<-sprintf('SELECT scaffold.length
FROM scaffold,scaffold2contig,contig2read
WHERE scaffold.scaffold_id=scaffold2contig.scaffold_id AND
scaffold2contig.contig_id=contig2read.contig_id AND contig2read.read_id LIKE
\'%%MG%d%%\'' ,i)
sqlcmd_ScaffLen

Your problem:
1. Need %% to create % when using sprintf
2. Need to use %d and not %s for integer values
3. Need to escape the quote marks.

On Mon, Mar 8, 2010 at 8:06 AM, alison waller <alison.waller@embl.de> wrote:

> Hello,
>
> I am using RmySQL and would like to iterate through a few queries.
>
> I would like to use sprintf but I think I'm having problems mixing and
> matching the sprintf syntax and the SQL regex.
>
> I have checked my sqlcmd and it works when I wan to match %MG1% but how
> do I iterate for i 1-72?  Escape characters,?
>
> thanks in advance
>
> i<-1
> sqlcmd_ScaffLen<-sprintf('SELECT scaffold.length
> FROM scaffold,scaffold2contig,contig2read
> WHERE scaffold.scaffold_id=scaffold2contig.scaffold_id AND
> scaffold2contig.contig_id=contig2read.contig_id AND contig2read.read_id
> LIKE
> '%MG%s%' ,i)
>
> ========= Here is my vague error message
>
> Error: unexpected input in:
>
> ______________________________________________
> 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<http://www.r-project.org/posting-guide.html>
> and provide commented, minimal, self-contained, reproducible code.
>



-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?

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