bp神经网络例二(分类)

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1、例二：考虑如下花的分类数据序号萼片长度萼片宽度花瓣长度花瓣宽度类别15.13.51.40.2124.931.40.2134.73.21.30.2144.63.11.50.21553.61.40.2165.43.91.70.4174.63.41.40.31853.41.50.2194.42.91.40.21104.93.11.50.11115.43.71.50.21124.83.41.60.21134.831.40.11144.331.10.11155.841.20.21165.74.41.50.41175.43.91.30.41185.13.

2、51.40.31195.73.81.70.31205.13.81.50.31215.43.41.70.21225.13.71.50.41234.63.610.21245.13.31.70.51254.83.41.90.2126531.60.212753.41.60.41285.23.51.50.21295.23.41.40.21304.73.21.60.21314.83.11.60.21325.43.41.50.41335.24.11.50.11345.54.21.40.21354.93.11.50.113653.21.20.21375.53

3、.51.30.21384.93.11.50.11394.431.30.21405.13.41.50.214153.51.30.31424.52.31.30.31434.43.21.30.214453.51.60.61455.13.81.90.41464.831.40.31475.13.81.60.21484.63.21.40.21495.33.71.50.215053.31.40.215173.24.71.42526.43.24.51.52536.93.14.91.52545.52.341.32556.52.84.61.52565.72.84

4、.51.32576.33.34.71.62584.92.43.312596.62.94.61.32605.22.73.91.4261523.512625.934.21.526362.2412646.12.94.71.42655.62.93.61.32666.73.14.41.42675.634.51.52685.82.74.112696.22.24.51.52705.62.53.91.12715.93.24.81.82726.12.841.32736.32.54.91.52746.12.84.71.22756.42.94.31.32766.6

5、34.41.42776.82.84.81.42786.7351.727962.94.51.52805.72.63.512815.52.43.81.12825.52.43.712835.82.73.91.228462.75.11.62855.434.51.528663.44.51.62876.73.14.71.52886.32.34.41.32895.634.11.32905.52.541.32915.52.64.41.22926.134.61.42935.82.641.229452.33.312955.62.74.21.32965.734.2

6、1.22975.72.94.21.32986.22.94.31.32995.12.531.121005.72.84.11.321016.33.362.531025.82.75.11.931037.135.92.131046.32.95.61.831056.535.82.231067.636.62.131074.92.54.51.731087.32.96.31.831096.72.55.81.831107.23.66.12.531116.53.25.1231126.42.75.31.931136.835.52.131145.72.5523115

7、5.82.85.12.431166.43.25.32.331176.535.51.831187.73.86.72.231197.72.66.92.3312062.251.531216.93.25.72.331225.62.84.9231237.72.86.7231246.32.74.91.831256.73.35.72.131267.23.261.831276.22.84.81.831286.134.91.831296.42.85.62.131307.235.81.631317.42.86.11.931327.93.86.4231336.42

8、.85.62.231346.32.85.11.531356.12.65.61.431367.736.12.331376.33.45.62.431386.43.15.