Hi Paul,
No, it's not new. it's always been the case.
http://www.pmel.noaa.gov/maillists/tmap/ferret_users/fu_2003/msg00447.html
And of course you can always set any value as the missing-value
use coads_climatology
let/bad=9999 sst_limited = if sst lt 10 then SST
shade/L=2 sst_limited
I'll add a quick note about that in the Users Guide.
Ansley
On 9/29/2010 10:41 AM, Paul Young wrote:
Hi Ansley,
Is the "else bad value" new? I always thought that "else 0"
was implied if else was left out....?
P
On Sep 29, 2010, at 11:41 AM, Ansley Manke wrote:
Hi-
Continuing what Paul suggests, to when using IF to mask a
variable, there is no need for the ELSE in definitions like
this
use coads_climatology
let sst_limited = if sst lt 10 then SST ! There is
an implied "else bad-value"
shade/L=2 sst_limited
On 9/29/2010 9:41 AM, Paul Young wrote:
Hi,
Not sure if this will help, but, if you're just
looking for where SSTs are a certain value, you can just
use an 'IF' statement without the need for looping.
e.g. Create a variable that contains the SST if SST
< 10C, and -999 if not:
use coads_climatology
let sst_limited = if sst lt 10 then SST else (-999)
!Just keep SSTs that are less than 10C
shade/lev=(-2,10,1) sst_limited[l=1]
shade/over/palette=black/lev=(-999)
sst_limited[l=1] !Black out unwanted SSTs
(No idea why you'd do this particular example!)
...You can get more sophisticated with masking etc
(e.g. using SSTs to mask some other variable) - see the
user guide for more on this.
Hope this helps,
Paul
On Sep 29, 2010, at 9:41 AM, K Wheel wrote:
Hello,
I have a problem with my ferret-script. It
includes a REPEAT and IF statement, although I
think the fault is in the IF part.
The following code has been set up:
REPEAT/i=1:362 \
( REPEAT/j=1:292 \
( IF SST[X=i, Y=j, L=1]
EQ 0 \
THEN \
LET SST[X=i, Y=j,
L=1] = 1/0 \
ENDIF \
) \
)
Which gives the following output in:
!-> REPEAT: I=1
!-> REPEAT: J=1
**ERROR: command syntax:
SST[X=i,Y=j,L=1]
IF SST[X=i,Y=j,L=1] EQ
0 THEN LET SST[X=i,Y=j,L=1] = 1/0 ENDIF
Command file, command
group, or REPEAT execurtion aborted.
Does anyone have an idea why the IF does not
recognise SST[X=1,Y=1,L=1] ?
Thank you!
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