Dear Alan,
many thanks.
2013/7/11 Alan R Williams <[email protected]>
>
> On 11/07/2013 08:22, Alessandro Oggioni wrote:
> > Dear all,
>
> Hello
>
> > For my work I usually used R to implemented processes. My idea is to
> > crate a workflow in Taverna using R scripts, to obtain plots or numeric
> > values.
> > I followed the documentation about Rshell
> > (http://dev.mygrid.org.uk/wiki/display/taverna/Rshell) and I installed
> > also Rserve on a different machine to where I run Taverna workbench. I
> > executed the very easy script (eg. y <– sin(x)) and this work fine. I
> > implemented also a workflow with different Rshell using deparse and
> > parse commands.
> > In this moment I have 2 type of problems:
> > 1. I have created R script with a R function. Which is the semantic type
> > to use in the output port in Rshell service? Could be possible to use
> > the R-expression?
>
> Yes, R-expression should be available as an output port's type.
>
Perfect I try to use R-expression in the Rshell.
>
> > 2. I have used Execute_SQL_Query Service. Which is the depth values to
> > obtain a result list that I can use as input in a Rshell?
>
> The Execute SQL query service returns a list of sub-lists. Each sub-list
> corresponds to a row of queried variables. The elements in the sub-list
> are the values for the variables.
>
> If you have, for example, an R script that takes a single integer input,
> it will not matter if you feed the results of the SQL query into it.
> Taverna will iterate over the elements of the lists and call the R
> script multiple times.
>
Please do you have an example about that.
>
> > And in Rshell
> > service what kind of semantic type should I use to the input from a SQL
> > query?
>
> It depends if you want to call the Rshell service once per value or once
> per row. You can choose a single value, such as Integer or a vector such
> as Integer vector.
>
> I hope this helps.
>
> > Many thanks in advance
> >
> > Alessandro
>
> Alan
>
Best regards
Alessandro
>
>
>
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--
PhD Ecology
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