Stats

  • Locked Locked
  • Replies 1
  • Subscribers 143
  • Views 10360
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Scaling the X (time) axes of a trace in skill / ocean

Simon T

Hi,

I am extracting data with a skill script and I want to scale the X axes of the traces.
I looked through the docu and forum but could not find a easy way to do it, hence I did it by hand.

Now I am wondering if there is a neat way to do it.

To scale the Y axes one can simply multiply it with a scalar.

Here is the snippet I use:

Fullscreen 3007.x_scaler.txt Download 
(procedure (abWaveToList wave @key transpose)
    (let (xList yList xyList len
            (xVec (drGetWaveformXVec wave))
            (yVec (drGetWaveformYVec wave))
        )
        (setq len (drVectorLength xVec))
        ;-----------------------------------------------------------------
        ; Return value of this if is the list
        ;-----------------------------------------------------------------
        (if transpose
            (progn
            (for i 0 (sub1 len)
                (setq xList (tconc xList (drGetElem xVec i)))
                (setq yList (tconc yList (drGetElem yVec i)))
            )
            (list (car xList) (car yList))
        )
        ; else
            (progn
            (for i 0 (sub1 len)
                (setq xyList (tconc xyList (list (drGetElem xVec i)
                (drGetElem yVec i))))
            )
            (car xyList)
            )
        ) ; if
    ) ; let
) ; procedure

trace = getData("node_of_interest")
fprintf(trace_file "Time[ns] volts\n")
foreach( point trace_as_list
    fprintf(trace_file "%.16f %.16f\n" (car(point) / 1e-9) nth(1 point))
)
fprintf(trace_file "\n")


closeResults(cur_res_path)

Best,
Simon

  • Hi Simon,

    I found that I wrote this a few years ago for another customer

    Andrew

    /* abScaleXaxis.il

Author     A.D.Beckett
Group      Custom IC (UK), Cadence Design Systems Ltd.
Language   SKILL
Date       Dec 21, 2015 
Modified   
By         

Scale the x-axis by a factor

Note this only works with non-harmonic data (so if it's harmonic-indexed
data, extract one harmonic at a time first using the harmonic() function)

abScaleXaxis(wave 2.0)

***************************************************

SCCS Info: @(#) abScaleXaxis.il 12/21/15.14:47:07 1.1

*/

procedure(abScaleXaxis(wave scale)
  cond(
    (drIsWaveform(wave)
      let((new)
        new=drCreateWaveform(drGetWaveformXVec(wave)*scale
          drGetWaveformYVec(wave))
        famSetExpr(new `(abScaleXAxis ,famGetExpr(wave) ,scale))
        new
      ))
    (famIsFamily(wave)
      famMap('abScaleXAxis wave scale)
      )
    (t
      error("abScaleXaxis: Can't handle %L\n" wave)
    )
  )
)

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.