Exploratory Data Analysis in GIS

Hi everyone!!
I finaly got some time to work on the lab.

For Section 1 by hand

1) data: 67.3, 61.8, 63.7, 62.4, 65.6, 66.2, 69.8, 63.9, 45.8, 78, 32, 68.0

a) mean: 62.04

data / number of occurrences = mean

(67.3 + 61.8 + 63.7 + 62.4 + 65.6 + 66.2 + 69.8 + 63.9 + 45.8 + 78 + 32 + 68.0) / 12 = mean

b) variance: 143.70

data – mean = (x) squared = y

67.3 - 62.04 = (5.26) squared = 27.6676 

61.8 - 62.04 = (-0.24) squared = 0.0576

63.7 - 62.04 = (1.66) squared = 2.7556

62.4 - 62.04 = (0.36) squared = 0.1296

65.6 - 62.04 = (3.56) squared = 12.6736

66.2 - 62.04 = (4.16) squared = 17.3056

69.8 - 62.04 = (7.76) squared = 60.2176

63.9 - 62.04 = (1.86) squared = 3.4596

45.8 - 62.04 = (-16.24) squared = 263.7376

78.0 - 62.04 = (15.96) squared = 254.7216

32.0 - 62.04 = (-30.04) squared = 902.4016

68.0 - 62.04 = (5.96) squared = 35.5216

(y1 +  y2 +  y3 +  y4 +  y5 +  y6 +  y7 +  y8 +  y9 +  y10 +  y11 +  y12) / 12 = variance

c) standard deviation: 11.99

Standard deviation = square root (variance)

For Section 2 of the lab using "R"

Using “R”

> commute = c(67.3, 61.8, 63.7, 62.4, 65.6, 66.2, 69.8, 63.9, 45.8, 78, 32, 68.0)

> commute

 [1] 67.3 61.8 63.7 62.4 65.6 66.2 69.8 63.9 45.8 78.0 32.0 68.0

> mean (commute)

[1] 62.04167

> sd (commute)

[1] 11.9873

> var (commute)

[1] 143.6954

INPUT into “R”….

> hist(commute, xlab ="Commute Time", main ="Histogram of Commute Time", col = 3, breaks = 6)

INPUT into “R”….

> boxplot(commute, main = "Boxplot of Commute Time", col = 5)

INPUT into “R”….

> qqnorm(commute, main = "Commute Time")                                

> qqline(commute)

For Section 3 of the lab using ArcGIS...

-I started out inputing the earthquake data, and reprojecting using....

Data Mangment Tools

>Projected and Transfomations

>Feature

> Project

Project Coordinate System

>Continential

>North America

>Noth America Equal Area Conic.prj OR Alaka Albers Equal Area Conic.prj...

-below I found the mean center/meadian center using the following tool in "tool box"

Spatial Statistic Tools

>Measuring Geographic Distrubution

>Mean Center

 OR

>Median Center

-below I used the Geostatistical Analyst Tool, first you had to go to...

Customerize

>Extenision

>Geostatistical Analyst

THEN

Customerize

>toolbars

>Geostatistical Analyst

WHEN the tool bar is present click on the...

Geostatistical Analyst

>Explore Data
 >Historgram



-below I used the Geostatistical Analyst Tool, first you had to go to...

Customerize

>Extenision

>Geostatistical Analyst

THEN

Customerize

>toolbars

>Geostatistical Analyst

WHEN the tool bar is present click on the...

Geostatistical Analyst

>Explore Data
>QQ plot

-below I found the mean center/meadian center using the following tool in "tool box"

Spatial Statistic Tools

>Measuring Geographic Distrubution

>Directional Distrubution

-below I used the Geostatistical Analyst Tool, first you had to go to...

Customerize

>Extenision

>Geostatistical Analyst

THEN

Customerize

>toolbars

>Geostatistical Analyst

WHEN the tool bar is present click on the...

Geostatistical Analyst

>Explore Data
>Voronoi Map