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25 lines
413 B
Fortran
25 lines
413 B
Fortran
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subroutine pltanh(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. 0.8 ) then
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y=0.83*x
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return
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elseif( z.le. 1.6 ) then
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y=isign*(0.322*z+0.4064)
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return
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elseif( z.le. 3.0 ) then
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y=isign*(0.0524*z+0.8378)
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return
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elseif( z.lt. 7.0 ) then
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y=isign*(0.0012*z+0.9914)
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return
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else
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y=isign*0.9998
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return
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endif
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end subroutine pltanh
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