Trying to get past a frustrating error to do a "simple" Box's M
test using Java.
The Box's M test says it will work with a data.frame.
Here's the setup code:
REXP myDf = REXP.createDataFrame(new RList(
new REXP[]
{
new REXPDouble(d1),
new REXPDouble(d2),
new REXPDouble(d3),
new REXPDouble(d4),
new REXPInteger(d5)
}));
Here's the call:
REXP boxMResult = rConnection.eval( "boxM(" + myDf+ "[,-5],
" + myDf + " [, 5])");
But, I keep getting syntax errors.
If this code isn't right, how do you build a data.frame R will like? No
examples I can find, anywhere.
Not sure what to try next. I've tried just sending a string with everything
commented, but nothing I've tried works.
Can anyone please suggest something to try?
Thanks in advance.
- M
Sent from [ProtonMail](https://protonmail.com), Swiss-based encrypted email.
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On 27/10/2017 8:10 AM, Morkus via R-devel wrote:> Trying to get past a frustrating error to do a "simple" Box's M test using Java. > > The Box's M test says it will work with a data.frame. > > Here's the setup code: > > REXP myDf = REXP.createDataFrame(new RList( > new REXP[] > { > new REXPDouble(d1), > new REXPDouble(d2), > new REXPDouble(d3), > new REXPDouble(d4), > new REXPInteger(d5) > })); > > Here's the call: > > REXP boxMResult = rConnection.eval( "boxM(" + myDf+ "[,-5], " + myDf + " [, 5])");I don't really know the R Java interface, but this doesn't make sense. You are pasting an REXP object myDf into a string to evaluate. It would make sense to assign that dataframe object to an R variable, and paste the name of that variable into your expression, or to construct a language object containing the dataframe object, but I don't know how to do those things. Duncan Murdoch> > But, I keep getting syntax errors. > > If this code isn't right, how do you build a data.frame R will like? No examples I can find, anywhere. > > Not sure what to try next. I've tried just sending a string with everything commented, but nothing I've tried works. > > Can anyone please suggest something to try? > > Thanks in advance. > > - M > > Sent from [ProtonMail](https://protonmail.com), Swiss-based encrypted email. > [[alternative HTML version deleted]] > > ______________________________________________ > R-devel at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel >
Thanks for the ideas. I'll keep trying... Sent from [ProtonMail](https://protonmail.com), Swiss-based encrypted email.> -------- Original Message -------- > Subject: Re: [Rd] How to do a "Box's M" Test with > Local Time: October 27, 2017 8:50 AM > UTC Time: October 27, 2017 12:50 PM > From: murdoch.duncan at gmail.com > To: Morkus <morkus at protonmail.com>, r-devel at r-project.org <r-devel at r-project.org> > > On 27/10/2017 8:10 AM, Morkus via R-devel wrote: > >> Trying to get past a frustrating error to do a "simple" Box's M test using Java. >> The Box's M test says it will work with a data.frame. >> Here's the setup code: >> REXP myDf = REXP.createDataFrame(new RList( >> new REXP[] >> { >> new REXPDouble(d1), >> new REXPDouble(d2), >> new REXPDouble(d3), >> new REXPDouble(d4), >> new REXPInteger(d5) >> })); >> Here's the call: >> REXP boxMResult = rConnection.eval( "boxM(" + myDf+ "[,-5], " + myDf + " [, 5])"); >> >> I don't really know the R Java interface, but this doesn't make sense. >> You are pasting an REXP object myDf into a string to evaluate. It would >> make sense to assign that dataframe object to an R variable, and paste >> the name of that variable into your expression, or to construct a >> language object containing the dataframe object, but I don't know how to >> do those things. >> >> Duncan Murdoch >> But, I keep getting syntax errors. >> If this code isn't right, how do you build a data.frame R will like? No examples I can find, anywhere. >> Not sure what to try next. I've tried just sending a string with everything commented, but nothing I've tried works. >> Can anyone please suggest something to try? >> Thanks in advance. >> >> - M >> >> Sent from [ProtonMail](https://protonmail.com), Swiss-based encrypted email. >> [[alternative HTML version deleted]] >> --------------------------------------------------------------- >> >> R-devel at r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-devel[[alternative HTML version deleted]]