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fwlcq金蟲 (小有名氣)
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【求助】MATLAB中BP神經(jīng)網(wǎng)絡(luò)的訓(xùn)練算法具體是怎么樣的? 已有1人參與
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| 我一直是在程序里面用train這個訓(xùn)練很熟,但是對已它里面具體的計算方法不大懂,希望高人指點一下!謝謝了! |
超級版主 (文學(xué)泰斗)
No gains, no pains.
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Step 1: >> help train --- help for network/train --- TRAIN Train a neural network. Description TRAIN trains a network NET according to NET.trainFcn and NET.trainParam. ... ... ... ... TRAIN calls the function indicated by NET.trainFcn, using the training parameter values indicated by NET.trainParam. Step 2: Search for net.trainFcn from online Help net.trainFcn This property defines the function used to train the network. You can set it to the name of any of the training function. The training function is used to train the network whenever train is called. [net,tr] = train(NET,P,T,Pi,Ai) For a list of functions type help nntrain Step 3: >> help nntrain Contents of nntrain: trainb - Batch training with weight & bias learning rules. trainbfg - BFGS quasi-Newton backpropagation. trainbr - Bayesian Regulation backpropagation. trainbuwb - Batch unsupervised weight/bias training. trainc - Cyclical order weight/bias training. traincgb - Conjugate gradient backpropagation with Powell-Beale restarts. traincgf - Conjugate gradient backpropagation with Fletcher-Reeves updates. traincgp - Conjugate gradient backpropagation with Polak-Ribiere updates. traingd - Gradient descent backpropagation. traingda - Gradient descent with adaptive lr backpropagation. traingdm - Gradient descent with momentum backpropagation. traingdx - Gradient descent w/momentum & adaptive lr backpropagation. trainlm - Levenberg-Marquardt backpropagation. trainoss - One step secant backpropagation. trainr - Random order weight/bias training. trainrp - RPROP backpropagation. trains - Sequential order incremental training w/learning functions. trainscg - Scaled conjugate gradient backpropagation. Step 4: 如果你想了解某一種具體的算法,可繼續(xù)深入。如果你只是直接調(diào)用,那么使用的只是默認(rèn)的算法。對于特定的例子,默認(rèn)的算法可能不是最高效的。 [ Last edited by nono2009 on 2009-9-25 at 15:18 ] |

金蟲 (小有名氣)
銀蟲 (小有名氣)
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