Graphing Data Without Time

[CamEra]

Hi,

 

I am looking at using DaqFactory as a display system for an instrument installation. we have a buoy in a lake with thermistors every 10 metres from the surface to the bottom. Every hour data is telemetered back to our office. That data is held in a csv file. I would like to get DaqFactory to read that file (no issue there as I have done that many times before) and put the data into an array such that the array contains pairs of data - depth of thermistor and the temperature (there are only 15 thermistors hence the array would be 15x2). I would then like to plot these two against each other - the bottom axis being the temperature and the Y axis as the depth.

 

I have had a go at this but haven't been able to get it sorted. Do you know if it is possible to do it?

 

Regards

 

George

[AzeoTech]

Yes, you can certainly do it.  If I knew I was always getting two measurements, I'd probably just use two 15x1 arrays, but you can do it with a 15x2.  Just use a second [] for the second dimension.  For example, to add a row at the end:

 

private len = numrows(myArray)

myArray[len][0] = depth

myArray[len][1] = temperature

 

Note that you have to get the length first, as the length will change once you do the first assignment.

 

Then to graph, put:

 

myArray[][0] 

 

for the Y expression, and:

 

myArray[][1]

 

for the X.  Change the X axis scaling to Lin so it doesn't create a trend graph.