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num2int

Convert number to signed integer

Syntax

y = num2int(q,x)
[y1,y,...] = num2int(q,x1,x,...)

Description

y = num2int(q,x) uses q.format to convert numeric x to an integer.

[y1,y,...] = num2int(q,x1,x,...) uses q.format to convert numeric values x1, x2,... to integers y1,y2,...

Examples

All the two's complement 4-bit numbers in fractional form are given by

x = [0.875 0.375 -0.125 -0.625
     0.750 0.250 -0.250 -0.750
     0.625 0.125 -0.375 -0.875
     0.500 0.000 -0.500 -1.000];

q=quantizer([4 3]);

y = num2int(q,x)

y =

     7     3    -1    -5
     6     2    -2    -6
     5     1    -3    -7
     4     0    -4    -8

Algorithms

When q is a fixed-point quantizer object, f is equal to fractionlength(q), and x is numeric

y=x×2f

When q is a floating-point quantizer object, y = x. num2int is meaningful only for fixed-point quantizer objects.

Introduced before R2006a

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