Sigma character - TYPE returns 3 (function)

[deSitter]

(12-17-2023 05:38 PM)Didier Lachieze Wrote:  

(12-17-2023 01:58 PM)deSitter Wrote:  Yes but I'm curious what the function is! I looked through every parameter of every standard app and no can find.

It’s the Sigma function. Place σ in the command line and press Help:

Quote:Σ -Summation

Syntax:
Σ(expr, var, ivalue, fvalue)

Finds the sum of expr with respect to var as var goes from ivalue to fvalue in steps of 1.


Examples:
Σ(X²,X,1,5) → 55
Σ({'X^2','Y-3'},{'X','Y'},{1,3},{5,10}) → {55,28}

NOT the summation function! I may have been born yesterday but I converged all night Lower case sigma. I just want to use the Greek character. There is a collision somewhere, I assumed int statistics apps, but can't find it in there.

-drl