User Guide

quantities represent unknown values with a central tendency. For more in-
formation on central tendency, refer to any text on error analysis for the
physical sciences or engineering.
Quantities with Uncertainty
Creating To construct quantities with uncertainty, use the Quantity com-
mand. You must specify the value and uncertainty. The uncertainty can be
defined absolutely, relatively, or in units of the last digit. For more informa-
tion on uncertainty specification, refer to the ?ScientificErrorAnalys-
is[Quantity] help page.
The output displays the value and uncertainty of the quantity.
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(3.13)
To specify the error in units of the last digit, the value must be of floating-
point type.
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To access the value and uncertainty of a quantity with uncertainty, use the
evalf and ScientificErrorAnalysis[GetError] commands.
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112 • 3 Performing Computations