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f#deedlefslab

F# Deedle returns strange output of <fun:it@156-43>

I am getting a strange output from Deedle when I use FirstKey and LastKey on a Frame of Rows. cl is a DataFrame in the below examples.

cl.Rows.FirstKey

returns: val it : (unit -> DateTime) = <fun:it@156-43> in the FSI window.

cl.Rows.LastKey

returns: val it : (unit -> DateTime) = <fun:it@157-44> in the FSI window.

I am expecting a Key Value of DateTime. Does anyone recognize the output? Do I have to do some kind of further processing to get useful output?

Update. I edited the question so that the complete output from the FSI window is now visible.

Solution

  • The comment by John Palmer has resolved my question. The correct way to code the FirstKey and LastKey function in my example(s):

    cl.Rows.FirstKey() 
cl.Rows.LastKey()