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README.md
**1. Title: Relative CPU Performance Data**
**2. Source Information**
-- Creators: Phillip Ein-Dor and Jacob Feldmesser
-- Ein-Dor: Faculty of Management; Tel Aviv University; Ramat-Aviv;
Tel Aviv, 69978; Israel
-- Donor: David W. Aha (aha@ics.uci.edu) (714) 856-8779
-- Date: October, 1987
**3. Past Usage:**
1. Ein-Dor and Feldmesser (CACM 4/87, pp 308-317)
-- Results:
-- linear regression prediction of relative cpu performance
-- Recorded 34% average deviation from actual values
2. Kibler,D. & Aha,D. (1988). Instance-Based Prediction of
Real-Valued Attributes. In Proceedings of the CSCSI (Canadian
AI) Conference.
-- Results:
-- instance-based prediction of relative cpu performance
-- similar results; no transformations required
- Predicted attribute: cpu relative performance (numeric)
4. Relevant Information:
-- The estimated relative performance values were estimated by the authors
using a linear regression method. See their article (pp 308-313) for
more details on how the relative performance values were set.
5. Number of Instances: 209
6. Number of Attributes: 10 (6 predictive attributes, 2 non-predictive,
1 goal field, and the linear regression's guess)
7. Attribute Information:
1. vendor name: 30
(adviser, amdahl,apollo, basf, bti, burroughs, c.r.d, cambex, cdc, dec,
dg, formation, four-phase, gould, honeywell, hp, ibm, ipl, magnuson,
microdata, nas, ncr, nixdorf, perkin-elmer, prime, siemens, sperry,
sratus, wang)
2. Model Name: many unique symbols
3. MYCT: machine cycle time in nanoseconds (integer)
4. MMIN: minimum main memory in kilobytes (integer)
5. MMAX: maximum main memory in kilobytes (integer)
6. CACH: cache memory in kilobytes (integer)
7. CHMIN: minimum channels in units (integer)
8. CHMAX: maximum channels in units (integer)
9. PRP: published relative performance (integer)
10. ERP: estimated relative performance from the original article (integer)
**8. Missing Attribute Values: None**
**9. Class Distribution:** the class value (PRP) is continuously valued.
PRP Value Range: Number of Instances in Range:
0-20 31
21-100 121
101-200 27
201-300 13
301-400 7
401-500 4
501-600 2
above 600 4
**Summary Statistics:**
Min Max Mean SD PRP Correlation
MCYT: 17 1500 203.8 260.3 -0.3071
MMIN: 64 32000 2868.0 3878.7 0.7949
MMAX: 64 64000 11796.1 11726.6 0.8630
CACH: 0 256 25.2 40.6 0.6626
CHMIN: 0 52 4.7 6.8 0.6089
CHMAX: 0 176 18.2 26.0 0.6052
PRP: 6 1150 105.6 160.8 1.0000
ERP: 15 1238 99.3 154.8 0.9665
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