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POhow to pick a percentage of data matlab
 

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    <p>Hi I have a data set lets call it <code>dataset A</code> and this dataset consists of 500x10 samples. I have another <code>dataset B</code> which is the class labels for each of those rows.</p> <pre><code>Dataset A | Dataset B 1 0.2 | 0.3 = Green 2 0.1 | 0.1 = Red 3 0.2 | 0.4 = Blue </code></pre> <p>and so on...</p> <p>I want to choose a percentage of blue and red from dataset A lets call it percentOfA and have another dataset which corresponds to that from dataset B, lets call it <code>ResultOfA</code> which is just matching colours to the percent of colours choosen from A. </p> <p>So the new dataset <code>percentOfA</code> would look like:</p> <pre><code>1 0.2 | 0.4 2 0.2 | 0.4 3 0.2 | 0.4 4 0.1 | 0.1 </code></pre> <p>75% blue and 25% red, then the new <code>resultOfA</code> would look like this:</p> <pre><code>1 Blue. 2 Blue. 3 Blue. 4 Red. </code></pre> <p>How is this achieved in matlab? </p> <p>Sorry I would try show code but I cant find anything for this in the documentation. </p> <p><strong>NEW EDIT:</strong></p> <p>So I am a tad lost on how to explain this better. Dataset B contains 500x1 of colours, Blue, Green, Red etc</p> <p>This dataset B matches dataset A but dataset A contains numerical values of what constitutes those colours.</p> <p>All I want to do is use dataset B to pick 75% of the blue colour and the ones it picked it keeps track of the row number and then uses those row numbers to take the data out of dataset A and put it into a new dataset. </p> <p>So that way my "newdataset" will just be 75% of the blue colour and or also 25% red from dataset A (the numerical values). </p>
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    1. COHow to pick?randomly?Also, 75% of all blue labels or just 75% of the rows you want to pick? And how many rows you want to pick?
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      1. USchaohuang
    2. CO@chaohuang yes randomly pick 75% of just the blue label and corresponding rows in dataset A and randomly pick 25% of just the red etc.
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      1. USKirsty White
 

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