To find the empty area between the matched MOS

Did you have a question? There's very little detail in the above, and a question (aided by a picture) would probably help...

yes i have a question, I have placed NMOS in 2 rows separated by some space in y direction between the mos (like modgen generate the matched module)  we route in pin to trunk manner where trunk is horizontal usually in metal2 through the empty space between the mos.

I would like to calculate the area of the empty space using skill .

I'm sorry to be pedantic, but you still didn't ask a question!

You just said that you would like to calculate the area of the empty space. Well, that's very nice - but presumably you were telling us for a reason?

Maybe  you're asking how to compute the area between them but without a picture, it's very hard to imagine what you are trying to compute? Maybe you you could place the NMOS in the layout, save an image of the window (using Export Image in the layout editor, ideally with rulers on to show what you're trying to find), and then post it as an attachment via the options tab when replying.

Kind Regards,

Andrew.

 This post is empty.  Perhaps you did not use the Options tab to add an image?

I'm not sure why you can't use the Options tab when replying to attach an image, as Lawrence described.

Anyway, if inst1 is the left instance and inst2 is the right instance, it would be:

xCoord(lowerLeft(inst2~>bBox))-xCoord(upperRight(inst1~>bBox))

to find the x-spacing between the two. If that's what you wanted.

As outlined in the Forum Guidelines, the more information you provide, the more likely you are to get a useful answer.

Kindest Regards,

Andrew.

Plese find the attachment. I am interested in find the area showing with marker.

xcordinate of each instances are same. 

Your code clearly wouldn't work because it's only comparing itself with itself. 

I'm assuming something along these lines would be what you're after:

cv=geGetEditCellView()
; first collect a table indexed by the xCoord of the instance origin
; each entry is a list of all the instances with the same x coord
sameXtable=makeTable('sameX nil)
foreach(inst cv~>instances
  x=xCoord(inst~>xy)
  sameXtable[x]=cons(inst sameXtable[x])
)
; then find any entry in the table with more than one instance
; and sort them in yCoord order (using the bBox in case they've been flipped), and print out the gap
; in the bBox's (in the y-direction)
foreach(x sameXtable
  insts=sameXtable[x]
  when(length(insts)>1
    insts=sort(insts lambda((a b) yCoord(lowerLeft(a~>bBox))<yCoord(lowerLeft(b~>bBox))))
    bottom=car(insts)
    foreach(inst cdr(insts)
      printf("Gap between %s and %s is %g\n" inst~>name bottom~>name
        yCoord(lowerLeft(inst~>bBox))-yCoord(upperRight(bottom~>bBox)))
    )
  )
)

Regards,

Andrew.