Try the following:
X=[1:10];
Y=[11:20];
[a,b]=concatenatingAllDataSets(5,X,Y)
You need to define the arguments for X,Y and total sets either earlier or as inputs to the function..
THe output is:
a =
1.00 6.00
2.00 7.00
3.00 8.00
4.00 9.00
5.00 10.00
b =
11.00 16.00
12.00 17.00
13.00 18.00
14.00 19.00
15.00 20.00