Diffrence between two data from data aquistion

[RavensFan]

I'm not sure what you mean by real time.

If you get a waveform out of your DAQmx Read, you can use Get Waveform components from the Waveform palette to unbundle and get the raw data Y array.

With a dynamic data type, you have the blue express VI conversions.  You are using one now to convert from the blue wire to a scalar.   If you right click and do properties, you can select various other outputs such as arrays, waveforms, arrays of waveforms, ....

[oly]

Thank you, Ravens.

I tried to wire Amplitude output with a 1-D array. However, only the first item in the array was keeping changing. All others are still zeros...I must have done something wrong.

What I tried to do is to store all the data from DAQ system into an array. Then later on, I can operate data in the array just like what we do in C or Matlab. For example, if we can store data in an array A[4]= (1, 2, 3, 4), after that, I can get any data out of the array by referring A[1]...A[4]....I am just wondering whether LabView can do this...Thank you!

[RavensFan]

Of course.  LabVIEW has the Index Array function to be able to access individual elements of an array.

We'd have to see your code to give any more help.