To make auto recording data

[konsang]

hi,
i am using the shift register to store higest value for continous signal.To do this, i need to compare current highest value in shift register with current signal value.If it is bigger than replace it in shift register.However, the main problem is i cant use the value in shift register to compare with my current signal(sine signal) with using exprees comparison tool.There is a error stated that i cannot connect the shift register to the input of the comparison tool.So how to solve this problem?
Thanks

[tst]

You should at least tell us which error it is, or post your code. But as a guess as to what this is, I'd say you're trying to compare two different things. Is it possible that you're wiring in your entire sample and comparing it only to the latest sample? Also, is it possible that your configuration of the VI is the problem?
What I suggest is this - use the regular greater than VI to compare your new sample with what comes out of the Shift register. If your new sample is greater, wire that into the SR, otherwise wire the old sample (use the select VI from the comparison palette).
Also, please don't post questions multiple times. People take time to answer these, and there is no reason for two people to answer the same question in two different threads.