[gradsusr] Converting the grid with conditional loop in grads

[Davide Sacchetti]

yes, you could easily do this in grads

I imagine you would not convert any grid, just display grid cells that
satisfy your conditions

1950 -> t=1
2015 -> t=66 (?)

example 1)
  set gxout grfill
  d const( maskout(population(t=1),population(t=1) - 10000) *
           maskout(population(t=66),population(t=66) - 10000), 1)

in a similar way you could perform number 2 and 3

bye bye
Davide

On Fri, 2018-12-28 at 12:04 +0800, Jayakrishnan P.R wrote:
> 
> Dear All,
>            I have a gridded data of population globally from 1950 to
> 2005. I wanted to do as follows.
> 1) Convert the grid into three different types.
> ie 
> Type 1 grid>>> Display those grids if greater than value 10000 in the
> year 1950 and greater than value 10000 in the year 2015..
> Type 2 grid  Display those grids if value less than 10000 in the year
> 1950 and greater than 10000 in the year 2015...
> Type 3 grid Display those grids if less than value 10000 in the year
> 1950 and less than value 10000 in 2015
> Any thoughts in grads will be appreciated....Can we do this using
> maskout function, constant function and if else statement ?. I am
> unable to do it in grads. Trying to do in mathlab...
> Jayakrishnan 
> 
> -- 
> Sincerely
> 
> **************************************************
> Dr. Jayakrishnan P.R
> Post Doctoral Research Fellow
> Science Technology Building
> School of System Science
> Beijing Normal University
> No. 96 XInjiekouwai Street
> Beijing 100875
> China
> Tel: +86-188 11005715
> 
> ****************************************************
> 
> 
> 
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