Reducing and Mapping

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Reducing and Mapping Vectors
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The commands in this section allow for more general operations on the
elements of vectors.

The simplest of these operations is `V A' (`calc-apply')
[`apply'], which applies a given operator to the elements of a vector.
For example, applying the hypothetical function `f' to the vector
`[1, 2, 3]' would produce the function call `f(1, 2, 3)'.
Applying the `+' function to the vector `[a, b]' gives
`a + b'.  Applying `+' to the vector `[a, b, c]' is an
error, since the `+' function expects exactly two arguments.

While `V A' is useful in some cases, you will usually find that either
`V R' or `V M', described below, is closer to what you want.

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