X scale: Minus values to zero

[merhydin]

Hello everyone!

 

I am trying to write a program which would allow to show on x axis (time) chart values from for example: -200 s to 0.

 

I would like each new data (1D array double) to have position 0 and earlier data to be shown as something what happened in the past. 

 

Unfortunately I did not have any idea how to do it. 

 

I will be very grateful for each hint. 

 

 

 

[infinitenothing]

Maybe you can accumulate the X and Y values in a shift register and use an XY graph