logistic序列

x = linspace( 0 , 0 , 500 );
x( 1 ) = 0.8 ;
t = linspace( 0 , 0 , 11 );
m = 0 ;
n = 0 ;
for i = 1 : 499
x(i + 1 ) = 3.9 * x(i) * ( 1 - x(i));
if x(i + 1 ) > 0.5
t(i + 1 ) = 1 ;
m = m + 1 ;
else
t(i + 1 ) = 0 ;
n = n + 1 ;
end
end
m
n

figure,plot(x);

输出结果：
287
212

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无法显示图片呢？