Array of Relative Time and Data

[Oesen]

Hello dear Labviewer

I have a Daq device which measures pressure as data in the Y-axis, and i use the relative time in the X-axis of the Waveform Chart. Now i want to make a array with 2 columns (Time and Data). I use that build array function with both my relative time and data, but how do i connect the relative time from the chart to the build array function ?.

[Aojha]

I could not get relative time of chart.

But you may use tick count or elapsled time vi to generate your own relative time data.

[Freelance_LV]

hi

check the attached picture vi.

[Oesen]

Hi Aojha.

Im afraid of there will maybe occur an offset time between the Chart time and the elapsed time, if i use that procedure ?

[Oesen]

Hi Freelance_LV

What's the relationship between this Vi and my Vi ?.

[Dennis_Knutson]

You can use the Get Waveform Time array and subtract the t0 from each element.

[Oesen]

Hi Dennis.

Is this okay?

[Dennis_Knutson]

It's okay only if you only want to write the time information and not Y data. In your first image, you had a build array to have the two columns. Why did you get rid of that?

Quite frankly, I don't understand what all of that code is doing. The wiring is a mess.

[Oesen]

The first part is to get rid of those crazy time numbers since 1. January 1904. Now i start my start time of the chart is 0 instead of something like 234324234.

The second part is to get rid of the random offset because i want to define the first data value as zero

[Oesen]

I have tried this solution, but i only get th Y-data and not the X-data (time data). Is there anything wrong ?

Thanks in advance

Oesen