How use the dequantization in matlab?

Hello guys.

I use the function quantiz, and lloyds to quantize one matrix, the code is the next:

level= 2;
interval = (max(r(:))-min(r(:)))/2^level;

partition = (min(r(:))+ intervalo_r: intervalo: max(r(:)));

[~,idx] = max(partition);
partition(idx) = [];

codebook = (min(r(:)) + intervalo/2.0: intervalo: max(r(:)));

[Uindex,Uquants,Udistor] = quantiz(r(:),partition,codebook);

The Uindex is the index of quants for matrix r, and the Uquants it´s the values of quantization.

I need "desquantize" the Uquants, how i can get this?

thank you

Best regards

Pedro