Fold in Mathematica (or reduce in Python) works as follows:
Fold[f, x, {a, b, c}] := f[f[f[x,a],b],c]That is, f is a binary operator, x is the initial value, and the results are cascaded along the list. I've found it useful for reducing lists when I only have a function that accepts two arguments (e.g., merge in R).
Is there any R equivalent? I'm a newbie in R and having a hard time finding such one. Thank you.
Seung
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