cousera machine learning
bayamasaMachine Learning definition
明瞭なプログラミングなしに、コンピューターに学ぶ能力を与えることを研究する分野
bayamasaSupervised Learning
Give the answer what is right. Then the algorism produce the answer nearly the given answer.
Regression : Predict continuous valued output.
bayamasaClassification
Discrete valued output(ex 0 , 1)
(離散した値)
bayamasaIf you use infinite number to the predictions, how does the computer store the attributes to the memory.
Ans : use support vectol machine.
Support vectol machine : 見せかけの無限を作り出す事ができる。
bayamasaUnsupervised Learning
Data doesn't have any labels
For example : google news
This site shows a lot of artcles and news. It aligns down the lists.
When you see the some news the title like 'BP Oil spill', you'll click on that.
Jumping to the page, it's wall street journal.com.
Back to that, you click the same link again. You'll see CNN page.
Because of unsupervised learning, same titles or similar ones aggregate to the same link.
bayamasaUse for social network analysis, Market segmentation, or Organize computing clusters
bayamasaGradient Descent
最急降下法
α = learning rate
αが大きければ、急勾配。小さければ緩やか。