difference between XY graph and wave form graph

[maple72]

whats the difference between XY graph and waveform graph cant get it , if  any one can explain it to me thnaks alot for your help

[chilly_charly]

A waveform is a data structure composed of time equidistant values. Basically, you could consider it as a cluster containing  two scalar values : the start time, the time increment and an array : the signal values. And of course, a waveform graph is the graph constructed from a waveform, using the time information to construct the t (X) scale and the signal values as Y values.

An XY graph is a graph built from data which do not need to be time equidistant. The data are two arrays for the X and Y axis, combined into a cluster (you can also use an array of clusters of Xand Y values)

For instance, you could record temperature and pressure at fixed time intervals and present the results as two waveform graphs : T = f(time) and P = f(time). But to present the evolution of pressure against temperature, you will need an XY graph.

[maple72]

I have this VI program , hope u can help me with it , I am capturing the graph of a signal from an HP8569B S.A., I am taking the peak value of the frequnecy , at each time I run the VI , I want to draw a graph of the peak value versus x values ranging from 0 step 1.2 , is my VI right < I am stuck i cant do more to establish my task plz help me

attached is my VI , the main file is HP8569B and the other files are  subVis inside this maing VI file

thnaks

[chilly_charly]

A cluster is not a random packet of values, you have to wire it, not only in the proper order, but also with the right input types.

In your vi, the graph is fed with wrong data.

You should study the examples shipped with LabVIEW and the example I gave you in my previous message