It's also possible to calculate the n-th Fibonacci number directly using
the golden ratio, phi. So for this case, we can just calculate every 3rd
number since we know they are even. q)phi:0.5*1+sqrt 5
q)fibn:{reciprocal[sqrt 5]*(-/)xexp[;y]x,1-x}[phi...
If you don't cast to minutes first, you can explicitly group by
millisecond (assuming your time column is a timestamp):
q)t:([]time:.z.p+500000*til 20;col:til 20) q)select avg col by 5000000
xbar time from t // millisecond = 1000000 nanoseconds time ...
What is your QHOME variable set to? C:\Users>echo %QHOME% C:\q You may
need to set it to the correct folder location. It is also helpful to add
q to your PATH while you are at it: C:\Users>setx QHOME "D:\kDB\w64"
C:\Users>setx PATH "%PATH%;D:\kDB\w64...
