Re: [ferret_users] Masking regions that have standard deviation outside of the range I have set

[Satyesh Ghetiya <satyeshghetiya@xxxxxxxxx>]

Hi Josh,

Perhaps the syntax needs to be corrected for the condition. Corrected one --> 

let mask= if mld[l=1:120@std] lt 30 OR mld[l=1:120@std] gt 80 then 1000 else mld[l=1:120@std]

Now you should shade mask (and not mld). Because mld variable is unchanged here.

Another way which I use in ferret for masking is :

let mask=if mld[l=1:120@std] lt 30 OR mld[l=1:120@std] gt 80 then 1/0 else 1;

let mld_good=mld*mask ; 

^ So mld_good variable is my mld variable at places where std is in (30,80). Everywhere else it is bad or missing (1/0 is not commutable, hence is treated as missing .... )

Regards,

Ghetiya Satyesh,

India

On Sat, Feb 9, 2019 at 11:45 PM JoshAB1995@xxxxxxxxxxx <JoshAB1995@xxxxxxxxxxx> wrote:

Hello everyone,

 

Context: I’m trying to shade data to show regions with a standard deviation between X values. I’ve tried using the following code, however when I then go back to shade x[l=x:x@std] nothing changes.

 

yes? let mask = if mld[l=1:120@std] lt 30 gt 80 then 1000 else mld[l=1:120@std]

yes? set var/bad = 1000 mld[l=1:120@std]

yes? shade mld[l=1:120@std] !the normal unmasked map appears...

 

So with that code I’m trying to describe to ferret that if the standard deviation of that time period lies outside of 30 and 80 then it should ignore it. The outcome I am after is the plot only shading the area that fits within those bounds (with a std of between 30 and 80). Any Idea’s as to why this isn’t working? Apologies if this is simple but I’ve been stuck on this for a while as a new user!!

 

Many thanks,

 

Josh

 

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