Take the 2-minute tour ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

My question is related to calssification in DataMining. But I believe anyone who has good background in Math/statistics can answer it.

As you remember a discrete-value training data of one dimension(e.g. sampling and quantizing a time signal) can be the

sequence [2,3,2,2] but a set should have unique values so the training set should be of the form
{2,3}.

I have the following table as my data set (the famous play golf example). this table stems from several realizations of a stochastic process:

 outlook         Temp.   Humidity      Windy   Play Golf

Rainy           Hot         High        False    No
Rainy           Hot         Low         True     No
Overcast        Hot         High        False    yes
Sunny          cold         High        False    Yes
?                ?          ?             ?      ?

As we see each feature(attribute) is a discrete variable. outlook can have 3 values. Temp.,Humidity and Windy can just have 2 values. As i said this table comes from several realizations. so i know that by doing many other experiments (realizations) all missing rows of this table can be completed (all combinations: 3*2*2*2=24).

This table is a representation of a Model(function or mapping) from these 4 features to ONE classes (Play Golf class).

Guys, Are you with me up to this point?


Here comes the question:

The (truth) above table is a way of representing a function(model) but it doesn't indicate how many times a realization can happen(its frequency).

for instance if i repeat the experiment 2 other times (2 realizations) and in both two cases i get for

outlook=Rainy, Temp=Hot, Humidity=High, Windy=False Play Golf=No ,

then i've obtained the same result as first row of my table. but I can't add it to this table, because this table shows the SETS not the repeated values.

In my real database creation, i have training data values (from different realizations) that are repetitive, so they won't complete my table because in a set we don't have a repeated value.So how can these repeated values help me in finding a Function(Model) for play golf?

thanks for your attentions and contributions

share|improve this question
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.