Neural Network toolbox, how to predict?

Hello everyone,

I am using Neural Network toolbox to do pattern recognition, but now I have a problem. I have already trained the neural network. To do the pattern recognition, I will test the network. I have a set of 100 testing samples of 4 classes, each of which has the format as follows:

feature set: feature 1, feature 2,feature 3,feature 4,feature 5,.................
target: 1 0 0 0 (for example)

that is to say, the input of the network is the feature set, and the output should have 4 binary values, only one of which is 1, in order to predict the specified class.

However, the actual output of the network is usually like:
0.9844, 0.0000, 0.2311, 0.085

In this case, how can I convert the output into binary values? How can I decide which class does this sample belong to?

Thank you very much in advance.

Best regards,
Hao