63.txt

来自「This complete matlab for neural network」· 文本 代码 · 共 35 行

发信人: ashun (阿顺), 信区: DataMining
标  题: 数据挖掘术语简介（二）
发信站: 南京大学小百合站 (Wed Aug 29 14:42:55 2001)

backpropagation 

A training method used to calculate the weights in a neural net from the data.


bias 

In a neural network, bias refers to the constant terms in the model. (Note tha
t bias has a different meaning to most data analysts.) Also see precision.

binning 

A data preparation activity that converts continuous data to discrete data by 
replacing a value from a continuous range with a bin identifier, where each bi
n represents a range of values. For example, age could be converted to bins su
ch as 20 or under, 21-40, 41-65 and over 65.

bootstrapping 

Training data sets are created by re-sampling with replacement from the origin
al training set, so data records may occur more than once. In other words, thi
s method treats a sample as if it were the entire population. Usually, final e
stimates are obtained by taking the average of the estimates from each of the 
bootstrap test sets. 
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