Hi Gerd,
Thanks for your response. I agree with you that 2nd shift register would yield the same value. It is a mistake. Actually I planned to increment
the 'i' value by 1 on each execution and feed it in to 'array subset.vi' inside the case structure. In the build array, the current data value will be added to index '0' of output array and the previous data values will be logged on to consecutive indices. Say at 21 min, the output array will have total 21 elements. The value at index '0' is 21st min value i.e. current value, which will be extracted by 'index array.vi'. The remaining 20 elements starting from index'1' to index'20' will be extracted by 'array subset.vi'. So for each iteration data values for latest 20 min duration will be extracted by incrementing 'i' value by 1. Unfortunately it could not be done as per you mentioned that for loop iterates once. Is any way could I increment 'i'?
Instead of 'feed back' node is it not possible to use the shift registers?
Senthil
