Run a command in an external application.

Syntax

xrun command

xrun is used to run a command in an external COM application (either R or MATLAB). An existing connection to the external application must have already been opened using xopen. xrun should be followed by the command you wish to run.

Examples

xopen(type=m, case=upper)

xput Y

xput XS

xrun beta = inv(XS'*XS)*XS'*Y

opens a connection to MATLAB, sends the series Y and the group XS to MATLAB, then runs a command which will compute the least squares coefficients from a regression of Y on XS.

The commands

xopen(type=r, case=upper)

xput(rtype=data.frame, name=cancer) age drug2 drug3 studytim

xrun z<-glm(STUDYTIM~AGE+1+DRUG2+DRUG3, family=Gamma(link=log),data=cancer)

send data to R and estimate GLM model.

Note that the statconnDCOM package does not always automatically capture all of your R output. Consequently, you may find that using xrun to issue a command that displays output in R may only return a subset of the usual output to your log window. In the most extreme case, you may see a simple “OK” message displayed in your log window. To instruct statconnDCOM to show all of the output, you should use enclose your command inside an explicit print statement in R. Thus, to display the contents of a matrix X, you must issue the command

xrun print(X)

instead of the more natural

xrun X

Cross-references

See “EViews COM Automation Client Support (MATLAB and R)” for a discussion.