Knowledge Base

Solution 12015: Algorithm Used to Calculate Xscl When Plotting a Histogram on the TI-83 Family, TI-84 Plus Family and TI-Nspire™ Handheld in TI-84 Plus Mode.

How is Xscl calculated when plotting a histogram on the TI-83 family, TI-84 Plus family and TI-Nspire handheld in TI-84 Plus mode?

When using the TI-83 family, TI-84 Plus family and TI-Nspire handheld in TI-84 Plus mode, the Xscl option can be accessed by pressing [WINDOW]. Xscl is calculated using the following formula.

(Xmax - Xmin) / N

where

N = INT(1 + log(dim) / log(2))

For example, if plotting a histogram using the following list: {1,2,3,4,5,6,7,8,9,10}

Xmax = 10
Xmin = 1
dim (dimension of list) = 10

N = INT(1 + log(10) / log(2)) = 4

Xscl = (10 - 1) / 4 = 2.25

Please see the TI-83 family and TI-84 Plus family guidebooks for additional information.

Note: TI-Nspire handheld in TI-84 Plus mode users may refer to the TI-84 Plus family guidebook.