Summary

(No information yet)

License

unknown (from Weka repository)

Dependencies

Tags

arff slurped Weka

Attribute Types

Integer,String

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# Instances: 323 / # Attributes: 13
HDF5 (61.2 KB) XML CSV ARFF LibSVM Matlab Octave

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Original Data Format

arff

Name

solar-flare

Version mldata

0

Comment

1. TItle: Solar Flare database

2. Source Information -- Donor: Gary Bradshaw gbradshaw@clipr.colorado.EDU -- Date: 3/89

3. Past Usage: -- Gary Bradshaw: (Class Attributes were collapsed to 0 and >0) -- See the past-usage file for a note written by Gary Bradshaw

4. Relevant Information: -- The database contains 3 potential classes, one for the number of times a certain type of solar flare occured in a 24 hour period. -- Each instance represents captured features for 1 active region on the sun. -- The data are divided into two sections. The second section (flare.data2) has had much more error correction applied to the it, and has consequently been treated as more reliable.

5. Number of Instances: flare.data1: 323, flare.data2: 1066

6. Number of attributes: 13 (includes 3 class attributes)

7. Attribute Information:

8. Code for class (modified Zurich class) (A,B,C,D,E,F,H)

9. Code for largest spot size (X,R,S,A,H,K)

10. Code for spot distribution (X,O,I,C)

11. Activity (1 = reduced, 2 = unchanged)

12. Evolution (1 = decay, 2 = no growth, 3 = growth)

13. Previous 24 hour flare activity code (1 = nothing as big as an M1, 2 = one M1, 3 = more activity than one M1)

14. Historically-complex (1 = Yes, 2 = No)

15. Did region become historically complex (1 = yes, 2 = no) on this pass across the sun's disk

16. Area (1 = small, 2 = large)

17. Area of the largest spot (1 = <=5, 2 = >5)

From all these predictors three classes of flares are predicted, which are represented in the last three columns.

1. C-class flares production by this region Number
   in the following 24 hours (common flares)

2. M-class flares production by this region Number in the following 24 hours (moderate flares)

3. X-class flares production by this region Number in the following 24 hours (severe flares)

4. Missing values: None

5. Class Distribution:

flare.data1:
0 1 2 4 Total C-class flares 287 29 7 0 323 M-class flares 291 24 6 2 323 X-class flares 316 7 0 0 323

flare.data2:

                0    1  2  3  4  5  6  7  8  Total

C-class flares 884 112 33 20 9 4 3 0 1 1066 M-class flares 1030 29 3 2 1 0 1 0 0 1066 X-class flares 1061 4 1 0 0 0 0 0 0 1066

Information about the dataset CLASSTYPE: nominal CLASSINDEX: last

Names

class,largest_spot_size,spot_distribution,Activity,Evolution,Previous_24_hour_flare_activity_code,Historically-complex,Did_region_become_historically_complex,Area,Area_of_the_largest_spot,

Types

1. nominal:B,C,D,E,F,H
2. nominal:A,H,K,R,S,X
3. nominal:C,I,O,X
4. nominal:1,2
5. nominal:1,2,3
6. nominal:1,3
7. nominal:1,2
8. nominal:1,2
9. nominal:1,2
10. nominal:1,2

Data (first 10 data points)

class	larg...	spot...	Acti...	Evol...	Prev...	Hist...	Did_...	Area	Area...	...
C	S	O	1	2	1	1	2	1	2	...
D	S	O	1	3	1	1	2	1	2	...
C	S	O	1	3	1	1	2	1	1	...
D	S	O	1	3	1	1	2	1	2	...
D	A	O	1	3	1	1	2	1	2	...
D	A	O	1	2	1	1	2	1	2	...
D	A	O	1	2	1	1	2	1	1	...
D	A	O	1	2	1	1	2	1	2	...
D	K	O	1	3	1	1	2	1	2	...
C	R	O	1	3	1	1	2	1	1	...
...	...	...	...	...	...	...	...	...	...	...

Description

A gzip'ed tar containing UCI and UCI KDD datasets (uci-20070111.tar.gz, 17,952,832 Bytes)

URLs

(No information yet)

Publications

Data Source

http://www.ics.uci.edu/~mlearn/MLRepository.html http://kdd.ics.uci.edu/

Measurement Details

Usage Scenario

revision 1

by mldata on 2010-11-06 09:58

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