Hi Saurabh,
Listing it is fine for me but there's a subtle thing here that is happening when you try to plot things. You need valid consecutive points in order to get line segments plotted.
For instance, April 1998 has a value of 1.15 so is moderate but March is 1.65 (strong) and May is 0.9 (neutral) so you get nothing plotted.
try
plot/thick=2/sym/line nino1,elnino1,lanina1
where elnino1 and lanina1 are defined to be moderate. See attached image where you can see the isolated points.
If you aren't getting anything it may be a problem with you Ferret version. I'm using 7.4
Russ
On 28/06/18 13:24, saurabh rathore wrote:
Dear Ferreters,
I am trying to extract enso index for magnitude >= 1 and < 1.5 but strangely it is doing something else that I am unable to understand. this is the steps for my masking
use nino34_new.nc
let nino1 = nino34
! for moderate enso !
let elnino1 = if (nino1 ge 1.0 and nino1 lt 1.5) then nino1
let lanina1 = if (nino1 le -1.0 and nino1 gt -1.5) then nino1
list elnino1, lanina1
but if I do the masking like this
let elnino1 = if nino1 ge 1.5 then nino1 ! strong enso
or
let elnino1 = if nino1 ge 1.0 then nino1 ! moderate + strong
then it works correctly and represent 1982, 1997, 2015 like strong enso cases but when I tried to extract moderate enso (bold highlight) then it is eliminating the enso events. Please help me I am unable to understand why it is so. I am also attaching the data for this purpose.
regards, saurabh
--
REGARDS
Saurabh RathoreResearch Scholar (PhD.)Centre For Oceans, Rivers, Atmosphere & Land Science TechnologyIndian Institute Of Technology, Kharagpurcontact :- 91- 8345984434