Hello,

I have a dataframe with columns like:

  parameter1 parameter2 metricname value

and I'd like to transform it into a dataframe with columns:

  parameter1 parameter2 metric1 metric2 metric3

where the values for each metric would be in the appropriate column.  There are 
often multiple values for a given (parameter1, parameter2, metricname) triple.  
In this case, I want to use the minimum value.

A constant number of metrics is associated with each possible combination of 
parameters.

I've cobbled together code that performs this using nested loops and far too 
many variables.  The number of metrics has now gone up by an order of magnitude 
and I'm looking for a more elegant way of doing this.  

If anyone has a short bit of code that can deal with this, I'd really 
appreciate having a look.

Thanks much,

Barry

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