MATLAB: Machine learning to predict yield

yield prediction

I am wanting to use a combination of numeric and categorical data to predict numeric data using matlab/machine learning. I'm wondering which application would do this. For example for a vineyard, I have weather data – which is the same for the vineyard and am wanting to use this to predict yield for different blocks of fruit. The only input data that I can say is different between these blocks is the soil type of the block. Which application could incorporate both this numeric and categorical data?

Best Answer

I think the right approach would be to convert the categorical variable into a numeric one by encoding it in numeric levels and probably it would work better if you normalize your attributes after that. You can refer to material related to dummy coding for categorical variables. After that you can leverage different algorithms in MATLAB's Statistics toolbox for predictive modelling.

Related Solutions

MATLAB: Indexing cannot yield multiple results.

First:

 train = tr.trainInd;

is not allowed because train is a reserved word.

I use

 trnind, valind, and tstind.

Notice the lower case i and the abbreviations of train and test.

Second:

If you want to use divideind, divide BEFORE TRAINING. For example:

 N = 110
 [trnind,valind,tstind]=divideind(N,1:2:100,4:2:48,52:2:108);
 net.divideFcn             = 'divideind';
 net.divideParam.trainInd  = trnind;
 net.divideParam.valInd    = valind;
 net.divideParam.testInd   = tstind;
 Notice that not all of the data is used.

Third:

Reread the documentation

 help divideind
 doc  divideind

Hope this helps.

Thank you for formally accepting this answer

Greg

MATLAB: Does trapz yield infinity

Because that function approaches infinity at x=0, and you have included that endpoint of the interval explicitly. Try this instead:

x      = 0.001:0.001:1;
ytDiff = 1./(2*(x).^(1/2));
ArcEq  = sqrt(1+ytDiff.^2);
s      = trapz(x,ArcEq)

Best Answer

Related Solutions

MATLAB: Indexing cannot yield multiple results.

MATLAB: Does trapz yield infinity

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