diff --git a/release-packaging/HelpSource/Classes/FluidDataSetQuery.schelp b/release-packaging/HelpSource/Classes/FluidDataSetQuery.schelp
index 1d8e57b..9b736b9 100644
--- a/release-packaging/HelpSource/Classes/FluidDataSetQuery.schelp
+++ b/release-packaging/HelpSource/Classes/FluidDataSetQuery.schelp
@@ -137,7 +137,7 @@ fork{
 ~query.filter(0,">",0.03);
 ~query.and(1,"<",1.08);
 ~query.or(2,">",2.98);
-~query.addRange(1,2);
+~query.addRange(2,2);
 ~query.transform(~dataSet, ~out);
 
 // Check the results
diff --git a/release-packaging/HelpSource/Classes/FluidPCA.schelp b/release-packaging/HelpSource/Classes/FluidPCA.schelp
index 869d035..f23a4d8 100644
--- a/release-packaging/HelpSource/Classes/FluidPCA.schelp
+++ b/release-packaging/HelpSource/Classes/FluidPCA.schelp
@@ -138,6 +138,11 @@ w.drawFunc = {
 w.refresh;
 w.front;
 )
+
+// transform a single point with arbitrary value
+~inbuf = Buffer.loadCollection(s,0.5.dup(12));
+~outbuf = Buffer.new(s);
+~pca.transformPoint(~inbuf,~outbuf,{|x,y|x.postln;y.postln;})
 ::
 
 subsection:: Server Side Queries