Log minimums
y = minlog(a)
y = minlog(q)
y = minlog(a) returns the smallest real-world
value of fi object a since logging
was turned on or since the last time the log was reset for the object.
Turn on logging by setting the fipref object LoggingMode property
to on. Reset logging for a fi object
using the resetlog function.
y = minlog(q) is the minimum value after
quantization during a call to quantize(q,...) for quantizer object q.
This value is the minimum value encountered over successive calls
to quantize since logging was turned on, and is
reset with resetlog(q). minlog(q) is
equivalent to get(q,'minlog') and q.minlog.
P = fipref('LoggingMode','on'); a = fi([-1.5 eps 0.5], true, 16, 15); a(1) = 3.0; minlog(a) ans = -1
The smallest value minlog can return is the
minimum representable value of its input. In this example, a is
a signed fi object with word length 16,
fraction length 15 and range:
-1 ≤ x ≤ 1 – 2-15
fi object a using
the range function:format long g r = range(a) r = -1 0.999969482421875
q = quantizer;
warning on
x = [-20:10];
y = quantize(q,x);
minlog(q)
Warning: 29 overflows.
> In embedded.quantizer.quantize at 74
ans =
-1The smallest value minlog can return is the
minimum representable value of its input. You can obtain the range
of x after quantization using the range function:
format long g r = range(q) r = -1 0.999969482421875
fipref | maxlog | noverflows | nunderflows | reset | resetlog