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25 lines
421 B
Fortran
25 lines
421 B
Fortran
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subroutine platanh(x,y)
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isign=+1
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z=x
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if( x.lt.0 ) then
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isign=-1
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z=abs(x)
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endif
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if( z.le. 0.664 ) then
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y=x/0.83
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return
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elseif( z.le. 0.9217 ) then
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y=isign*(z-0.4064)/0.322
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return
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elseif( z.le. 0.9951 ) then
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y=isign*(z-0.8378)/0.0524
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return
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elseif( z.le. 0.9998 ) then
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y=isign*(z-0.9914)/0.0012
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return
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else
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y=isign*7.0
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return
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endif
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end subroutine platanh
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