C.2.1. - Lower-case letters
The letters
n and
i have special meaning.
By assigning
to
n you can set the number of points.
When
i is used
on the right side of an equation, its value is the index number of
the data point.
(Index numbers start at 0.)
Valid vector names are
x, y, z, r, s, t, t0, t1 and
t2. Both
r and
z refer
to the same data vector, representing
x
error bars in 2D mode
and
z
data in 3D mode.
The vector
t refers to a data
vector internal to
calc.4
that can be used to hold intermediate
results.
This data vector retains its values through subsequent calls
to
calc.4.
The vector
t0 refers to the same storage as
t, while
t1 and
t2 are additional temporary vectors.
You can assign values to vectors by placing them on the left side of an equals sign. You can use their current value by placing them on the right side of the equals sign.