Fixed-Point Toolbox™

bin2num - Convert two's complement binary string to number using quantizer object

Syntax

y = bin2num(q,b)

Description

y = bin2num(q,b) uses the properties of quantizer object q to convert binary string b to numeric array y. When b is a cell array containing binary strings, y is a cell array of the same dimension containing numeric arrays. The fixed-point binary representation is two's complement. The floating-point binary representation is in IEEE^® Standard 754 style.

bin2num and num2bin are inverses of one another. Note that num2bin always returns the strings in a column.

Examples

Create a quantizer object and an array of numeric strings. Convert the numeric strings to binary strings, then use bin2num to convert them back to numeric strings.

q=quantizer([4 3]);
[a,b]=range(q);
x=(b:-eps(q):a)';
b = num2bin(q,x) 

b = 

0111    
0110    
0101    
0100    
0011    
0010    
0001    
0000    
1111    
1110    
1101    
1100    
1011    
1010    
1001    
1000    

bin2num performs the inverse operation of num2bin.

y=bin2num(q,b) 

y = 

    0.8750 
    0.7500 
    0.6250 
    0.5000 
    0.3750 
    0.2500 
    0.1250 
         0 
   -0.1250 
   -0.2500 
   -0.3750 
   -0.5000 
   -0.6250 
   -0.7500 
   -0.8750 
   -1.0000 

See Also

hex2num, num2bin, num2hex, num2int

bin

bitand