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[ferret_users] Masking and set var/bad = 0



Good Afternoon,

 

I’m having an issue using the set var/bad = 0 dataset command. I’ve defined some new regions as the following, to indicate presence or absence of stratification:

 

let X = if stratified[l=1:12@sum] eq 0 then 1 else 0

let Y = if stratified[l=10:2@sum] eq 0 and stratified[l=3:9@sum] gt 0 and stratified[l=3:9@sum] le 3 then 1 else 0

 

So this creates a map of 1’s where the region matches what is described in the mask, and 0’s where it doesn’t.

 

So now I try to mask out all of the 0’s so that I can create shapefiles of the areas matching my description using:

 

Set var/bad = 0 X

Set var/bad = 0 Y

 

However, this seems to mask the entirety of my data and I get a screen telling me that no data is available.

 

Does anyone have any clues as to why this happens? Because I am lost for ideas, I think it might be to do with the fact that both of these ‘original’ datasets will have values of 0 (as seen in original definitions), and so it is masking the original dataset, does anyone know how I can make the mask apply only to my map of 1’s and 0’s?

 

Many thanks,

 

Josh

 

Sent from Mail for Windows 10

 


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