XY Graphs

[Magical Marshmallow]

Hi,

I am using a Sine wave to simulate what will eventually be an input from a pressure transducer. I have placed a Waveform Graph on the front panel to give a graphical output.

What I now want to do is to change this Waveform Graph to an XY graph. The X-axis of this should record time in seconds and the Y-Axis Pressure (in the simulated case, this is the amplitude of the sine wave).

When I run this, the scale on the XY graph is huge (3E+9) It is setup to auto scale. Also no plot trace is visible.What I want is an X-Axis which will increase its scale so as to record the Data over time. Thus giving the entire experiments pressure on one plot.

How can I solve this problem?

Cheers

[RavensFan]

How do you expect the For Loop to end if you run in an infinite number of times?

[Magical Marshmallow]

I specified a finite number of loops (10) and got what is described above.

Ignore the infinite symbol!!

How can I get the desired output?

[RavensFan]

Post your updated VI so we can play with it.

[NIquist]

Why are you using a graph at all?  It sounds like a job for the chart.

[Magical Marshmallow]

Will the chart give me a continuous output once connected to a 'real' data source? (Thermocouple/Pressure Transducer?

Cheers

[_Bryan]

You could create a simulated device in MAX and create a dummy channel, that dummy channel will put out a sinewave since it is simulated.  Then put a DAQmx read on the block diagram to read the dummy channel you made.  Set the read for a single channel waveform and hook it up to a waveform chart.  That will give you a sinewave with a timestamp which should be similar to the way you are going to be reading the data for real.

Message Edited by _Bryan on 05-28-2010 05:12 PM