Thread: data in Database

How to quantize data in Database

quantize database in what sense ... can you just complete the sentence .... and full desc what is in your mind

Sorry Dear,

Quantizing Data with quantizer Objects

You construct a quantizer object to specify the quantization parameters to use when you quantize data sets. You can use the quantize function to quantize data according to a quantizer object's specifications.
Once you quantize data with a quantizer object, its state values might change.
The following example shows

• How you use quantize to quantize data
• How quantization affects quantizer object states
• How you reset quantizer object states to their default values using reset

1. Construct an example data set and a quantizer object.
   format long g
   randn('state',0);
   x = randn(100,4);
   q = quantizer([16,14]);
2. Retrieve the values of the maxlog and noverflows states.
   q.maxlog
   
   ans =
   
   -1.79769313486232e+308
   
   q.noverflows
   
   ans =
   
   0Note that maxlog is equal to -realmax, which indicates that the quantizer q is in a reset state.
3. Quantize the data set according to the quantizer object's specifications.
   y = quantize(q,x);
   Warning: 15 overflows.
4. Check the values of maxlog and noverflows.
   q.maxlog
   
   ans =
   
   1.99993896484375
   
   q.noverflows
   
   ans =
   
   15Note that the maximum logged value was taken after quantization, that is, q.maxlog == max(y).
5. Reset the quantizer states and check them.
   reset(q)
   q.maxlog
   
   ans =
   
   -1.79769313486232e+308
   
   q.noverflows
   
   ans =
   
   0

Source: Fixed-Point Toolbox

What is quantize data? Clear the info.

I can understand what u want to say ..........sorry