presistance graph that hold maximum values and also display real time spectrum

[Aht22]

hello everyone!
i want to plot a real-time spectrum data to graph also plot a second waveform that contains the real-time data peak value if the incoming peak values greater than the plotted peak values it replaces with the new incoming real-time values otherwise the peak values graph remain same. and plot the incoming real-time spectrum signal and the maximum values signal plot on the same graph.

In my opinion, I plot real-time data and also compare with the next incoming data but I am confused in how to compare the previous data with the new data and hold data if new values are less then the plotted data.

kindly suggest how is it possible.
your suggestions are highly appreciated.

[GerdW]

Hi Aht,

first important note: your message would be a lot easier to read if you would use some more punctuation and capitalization!

I am confused in how to compare the previous data with the new data and hold data if new values are less then the plotted data.

This is pretty basic LabVIEW stuff: use a shift register!

(You surely noticed that "Training" section at the top of this LabVIEW board, did you?)