Hi, Rather than trying to write loops, look for Ferret transformations or functions that let you define a new variable that captures the operation you want to use. define axis/x=1:10:1 xax let array = x[gx=xax] let array_1 = array[x=@ddb] If you read the first chapter of the Users Guide, you'll start to see how best to use the program. Then the next few chapters give details about different aspects of using Ferret. Ansley On 8/23/2011 1:24 PM, PaulaOCN Nunes wrote:
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