Index exceeds the number of array elements

I am still in school learning matlab and need some help. I have seen other ones like this but they don't go into what to do with a double.

I loaded a file that has a double 10000x2

and I am getting this error.

Index exceeds the number of array elements (2).

Error in Week2(line 14)

classTwoTrainingIndices = randomizedIndices(1:6000);

[Walter Roberson]

It is easier for us to work with code rather than with images of code.

Answer 1

[Walter Roberson]

randsample() by default is selection without replacement. When you pass in an integer as the first parameter, the implication is to select from 1 to the integer. As you are passing in the same integer as the second parameter, the effect you are going to get is a permutation of the numbers from one to the integer. Since NumberOfClassOneSamples is 2, that is going to be a random permutation of [1 2]... which will give you either [1; 2] or [2; 1] as the answer.

You then try to take the first 6000 entries in that pair of numbers.

In your code each row appears to represent a sample. The number of samples in of data would then be size(ClassOne, 1) not size(ClassOne,2)

Also, classOneTrainingData should be classOne(classOneTrainingIndices, :) because you want all of the entries in the row.

[G. Nardi]

Thanks I appreciate the explanation. It was great great help!