In Spotfire,we have direct option to loop thru Data Table but not for Cross Table.
Below is the python script to capture the Cross Table Data into 2D Array and then it can be used for Loop Thru as per your requirement.
import System
from System.IO import *
from Spotfire.Dxp.Data import *
from Spotfire.Dxp.Application. Visuals import *
from Spotfire.Dxp.Data.Import import *
from System import Byte
memStream = MemoryStream();
sWriter = StreamWriter(memStream);
#Exporting the data to Memory Stream
crossTable.As[CrossTablePlot]( ).ExportText(sWriter);
memStream.Seek(0, SeekOrigin.Begin);
sReader = StreamReader(memStream);
str="";
# 2D Array
lst=[[]];
i=0;
#Reading Memory Stream and then saving it to 2D Array
while(sReader.Peek() >=0):
a=sReader.ReadLine();
a=a.replace("\t", "!");
temparray=a.split("!");
j=0;
count=len(temparray);
#print count
while j < count:
lst[i].append(temparray[j]);
j=j+1;
i=i+1;
lst.append([])
del lst[len(lst)-1]
#Final Arrary
print lst