Export is.im3d

* was documented but not exported

Author: jefferis

NAMESPACE

@@ -225,6 +225,7 @@ export(is.amiramesh)
 export(is.cmtkreg)
 export(is.dotprops)
 export(is.fijitraces)
+export(is.im3d)
 export(is.neuron)
 export(is.neuronlist)
 export(is.nrrd)

R/im3d.R

@@ -79,6 +79,7 @@ im3d<-function(x=numeric(0), dims=NULL, voxdims=NULL, origin=NULL,
 #' @param x Object to test
 #' @return logical
 #' @family im3d
+#' @export
 is.im3d<-function(x) inherits(x, 'im3d')
 
 #' Convert a suitable object to an im3d object.