following x-axis

[jastel]

I don't know if I am saying this right, But i want the x-axis to float, meaning I want the plot to stay in the middle of the graph while it is collecting data, but i don't want it to auto scale and bunch everything up. any help would be nice

[muks]

Then you can uncheck the autoscaling feature. If that is what you meant

[Dimitrios]

Do as muks suggested and then you can click in the minimum or maximum number of your x-scale and edit/change it manually accordingly.

[jastel]

I have done this already, but what I am looking for is if there is a way I can set this up to stay current in time. This program is running for 45 min, but you only look at about 30-60 sec worth of data at a time and I need it to stay current in time without having to manually adjust. any ideas?

[Dimitrios · Accepted solution]

I think i know what you are asking.

If for example now it stays for 60sec worth of data and you want to be able to fit 45mins then do that.

Right-click the graph on the front panel and select 'chart history length' the default value is 1024 make that 45x1024=46080 (in fact make it a bit bigger say 50000.

Then when you click the maximum x-axis point to edit it you should be able to enter 49999 which is enough number to fit your 45mins data.

Just a hint, if you know how often you aquire data (delay in your loop) you can go to graph Propeties--->Scales--->Time(X-Axis) and change your 'multiplier' so the x-axis is displayed in seconds instead of points aquired. So for example if you aquire at 10Hz (loop delay 100ms) if you change your multiplier to 0.1 the x-axis will be in seconds.

Then if you do it that way you need to change your maximum x-axis point from 50000 to 45minx60sec=2700.

Have a look at the example i made for you. If you don't have LV2009 let me know and i will downgrade it.

Try them one by one not all of them at the same time.

Hope that helps

[jastel]

That is exactly what I am trying to do. but for some reason I don't have that chart history option.....when I right click on yours its there, but on mine its not. is there another place to find it

[Dennis_Knutson]

You need to actually be using a chart (not a graph) to have the option.

[jastel]

never mind, i recreated the graph and it was there, thank you