how to use select row in simulink

I am trying to understand the command "select row". I inserted in the indices of the select row block 54321 which i thought that the output of this block will take the input and flip it based on the indices. for example if the input is [ 1 2 3 4 5] it will change to [5 4 3 2 1]. I used the attached m file to output the data from both input and output but i am not seeing the data being flipped. Please take a look and explain to me.