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Asymmetric soft clipper with parameter
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| # license CC0-1.0 or MIT | |
| cubic(x)=(x*x*x/3) | |
| lm(k)=-sqrt(k*k*k)/(k*k*k) # the local minimum | |
| kubic(k,x)=x-cubic(k*x) | |
| max(a,b)=(a>b)?a:b | |
| nl(k,x)=(x>0)?x:kubic(k,max(x,lm(k))) | |
| set xrange [-1:+1] | |
| plot nl(1.0,x), nl(1.25,x), nl(1.5,x), nl(1.75,x), nl(2.0,x) |
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