HP 50g Graphing Calculator - Manual (Page 283)

Page 9-6
Building a vector with ARRY
The function → ARRY, available in the function catalog ( ‚N‚é, use
—˜ to locate the function), can also be used to build a vector or array in
the following way. In ALG mode, enter ARRY(vector elements, number of
elements), e.g.,
In RPN mode:
(1) Enter the n elements of the array in the order you want them to appear in
the array (when read from left to right) into the RPN stack.
(2) Enter n as the last entry.
(3) Use function ARRY.
The following screen shots show the RPN stack before and after applying
function ARRY:
Summary of Matrix Writer use for entering vectors
In summary, to enter a vector using the Matrix Writer, simply activate the writer
(
„²), and place the elements of the vector, pressing ` after each of
them. Then, press ``. Make sure that the @VEC and @GO → @ keys are
selected.
Example: „²³~„xQ2`2`5\``
produces: [‘x^2‘ 2 –5 ]