Add new element to row.

[kaush]

Hi, I am very new to LabView. I am using LV8.6 .

I want to do following things

1. The main aim is to plot hysteresis and deadband of my positioner.

2. I am using OPC to read the values.

3. Please see the attached vi .

Operator will enter signal coloum. I just want to get the position reading and place it in the corresponding cell in the table. I dont know how to address particular cell inside the table.

And also i want to draw graph for the same values. (please see the image)

Please help me.

[MikeS81]

Hi kaush,

you have to read the data from your table, replace the cell you want (use array function for it) and write it back to your table.

Sorry, i can't open your vi at the moment.

Mike

[kaush]

Thanks mike.

But sorry.. i am not clear with the explanation.  😞

[MikeS81]

Hi kaush,

what do you mean? You have a table, it is a 2d array of strings. To replace part of it, you can use the "replace array subset" function.

Mike

[kaush]

I can insert the new element. But how to increment the index of the array automatically. Can i create any property node for that ?

[MikeS81]

Hi kaush,

you have to store the value in your program, you can use a shift register for it.

Mike

[kaush]

Hello mike,

Thanks..

i wand to append element to the bottom. Please see the image..

[MikeS81]

Hi kaush,

you should initialize your array first, then you can use the replace function.

See the attached example please.

Hope it helps.

Mike

[smercurio_fc]

Keep in mind that a 2D array must always be rectangular. In your screenshot you cannot simply add an element at row 2 column 2 without LabVIEW automatically adding another element at row 3 column 2 in order to keep the array rectangular. This is by design.

[kaush]

Thanks a lot for both.

I forgot to mention that there r two arrays. Please see the image.

Thanks mike for example. I am trying to modify that.