Texas Instruments TI-Nspire Reference Guide

62 TI-Nspire™ Reference Guide
median(Matrix1[, freqMatrix]) ⇒ matrix
Returns a row vector containing the medians of the columns in
Matrix1.
Each freqMatrix element counts the number of consecutive
occurrences of the corresponding element in Matrix1.
Notes:
• All entries in the list or matrix must simplify to numbers.
• Empty (void) elements in the list or matrix are ignored. For more
information on empty elements, see page 131.
MedMed
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MedMed X,Y [, Freq] [, Category, Include]]
Computes the median-median line y = (m·x+b) on lists X and Y
with frequency Freq. A summary of results is stored in the
stat.results variable. (See page 97.)
All the lists must have equal dimension except for Include.
X and Y are lists of independent and dependent variables.
Freq is an optional list of frequency values. Each element in Freq
specifies the frequency of occurrence for each corresponding X and Y
data point. The default value is 1. All elements must be integers | 0.
Category is a list of numeric or string category codes for the
corresponding X and Y data.
Include is a list of one or more of the category codes. Only those data
items whose category code is included in this list are included in the
calculation.
For information on the effect of empty elements in a list, see “Empty
(void) elements” on page 131.
Output variable Description
stat.RegEqn Median-median line equation: m·x+b
stat.m, stat.b Model coefficients
stat.Resid Residuals from the median-median line
stat.XReg List of data points in the modified X List actually used in the regression based on restrictions of Freq,
Category List, and Include Categories
stat.YReg List of data points in the modified Y List actually used in the regression based on restrictions of Freq,
Category List, and Include Categories
stat.FreqReg List of frequencies corresponding to stat.XReg and stat.YReg
mid()
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mid(sourceString, Start[, Count]) ⇒ string
Returns Count characters from character string sourceString,
beginning with character number Start.
If Count is omitted or is greater than the dimension of sourceString,
returns all characters from sourceString, beginning with character
number Start.
Count must be | 0. If Count = 0, returns an empty string.
median()
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Texas Instruments TI-Nspire Specifications

General

Type	Display
Form factor	Pocket
Product color	Blue, White
Display resolution	320 x 240 pixels
Display size (HxV) (imperial)	0 \
Compatible operating systems	Windows Vista/XP Mac OS X 10.4/10.5
Battery type	AAA
Number of batteries supported	4

Weight and Dimensions

Dimensions (WxDxH)	100 x 198.3 x 28.7 mm