Note: If we had entered the elements in lists L4 and L3 as integers, the infinite symbol would be shown whenever a division by zero occurs. To produce the following result you need to re-enter the lists as integer (remove decimal points) using Exact mode:

If the lists involved in the operation have different lengths, an error message (Invalid Dimensions) is produced. Try, for example, L1-L4.

The plus sign (

), when applied to lists, acts a concatenation operator,

 

+

 

 

putting together the two lists, rather than adding them term-by-term. For

example:

 

 

 

In order to produce term-by-term addition of two lists of the same length, we need to use operator ADD. This operator can be loaded by using the function

catalog (

). The screen below shows an application of ADD to add

lists L1 and L2, term-by-term:

Functions‚Napplied to lists

Real number functions from the keyboard (ABS, ex, LN, 10x, LOG, SIN, x2, , COS, TAN, ASIN, ACOS, ATAN, yx) as well as those from the MTH/HYPERBOLIC menu (SINH, COSH, TANH, ASINH, ACOSH, ATANH), and MTH/REAL menu (%, etc.), can be applied to lists, e.g.,

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HP 49g manual Functions‚Napplied to lists, When applied to lists, acts a concatenation operator, Example