Re: [ferret_users] REPEAT leading to overlapping timestamps

["Ansley C. Manke" <ansley.b.manke@xxxxxxxx>]

Hi Ryo,

Thank you for reporting to the list -- as you say we've looked at it, and don't see an easy fix.  It happens only when the plots are in viewports. I have just a small addition to the examples.  In PyFerret, set a font with

set text/font=arial

or some other font name

On 5/20/2020 1:28 AM, Ryo Furue wrote:

Dear Ferret users,

This is to document a minor, known bug in Ferret and PyFerret, which seems to surface only very rarely.  It's already reported and confirmed. At present, it's not known when it will be fixed.  I also present a few workarounds we have found (Thanks to Ansley).

Suppose we have a Ferret script like this:

. . .

ppl dfltfnt TR

. . .

set view myview

. . .

repeat/L=1:3000 ( \

    . . . ; \

    fill . . . ; \

    . . .; \

    frame/file=image`L,zw=4`.png )

The timestamp on the image is eventually corrupted.  See the attached picture.  This happens only in some obscure situations. 

1) One workaround is to reset the viewport at each iteration:

repeat . . . ( \

    . . .

    cancel view; set view myview )

2) (PyFerret) Another workaround is to use a different font

ppl dfltfnt TR ! → something else

3) A third is to stop the iteration before the corruption happens:

pyferret -nodisplay -script plot.jnl       1 1000 !! image Nos.1–1000

pyferret -nodisplay -script plot.jnl 1001 2000 !! image Nos.1001–2000

. . .

(Breaking up the loop within a single pyferret session doesn't seem to fix the problem. Hence the multiple sessions as above.)

Best regards,

Ryo

-- 
Ansley Manke
Science Data Integration Group
NOAA Pacific Marine Environmental Laboratory
7600 Sand Point Way NE
Seattle WA 98115

I am currently teleworking and am available Tue-Wed-Thu.