What is difference between training set and test set database?

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preeti
preeti 2015-5-20
评论： Walter Roberson 2015-5-20
I have collection of database having images with 25 categories like mountains,rivers,fields,chaparal ,etc .Each category have 40 images.Now I dont know how to divide the dataset into training and test set.In my project a query image from query folder is fired and from the dataset the similar images will be given as output.
Pls suggest how to divide the dataset in good ratio.

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回答（1 个）

Walter Roberson
Walter Roberson 2015-5-20
  2 个评论
preeti
preeti 2015-5-20
编辑：Walter Roberson 2015-5-20
Thank you Sir,
But I have dataset of 1000 images with 25 categories
I get this code
nrows = size(YourData,1);
r80 = round(0.80 * nrows);
rand80 = randperm(nrows,r80);
trainingset = YourData(rand80,:);
testset = YourData;
testset(rand80,:) = [];
but wat should be urdata?
Walter Roberson
Walter Roberson 2015-5-20
Suppose that you read the images into I{K} for the K'th image, so I is a cell array of data arrays. And suppose that all of the images are exactly the same size. Then
T = cellfun(@(img) img(:), I); %make columns from each image
T2 = horzcat(T{:}); %splice the columns together
YourData = T2.'; %so each image is now a row vector

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