mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-10-31 15:47:10 -04:00
25 lines
413 B
Fortran
25 lines
413 B
Fortran
|
subroutine pltanh(x,y)
|
||
|
|
isign=+1
|
||
|
|
z=x
|
||
|
|
if( x.lt.0 ) then
|
||
|
|
isign=-1
|
||
|
|
z=abs(x)
|
||
|
|
endif
|
||
|
|
if( z.le. 0.8 ) then
|
||
|
|
y=0.83*x
|
||
|
|
return
|
||
|
|
elseif( z.le. 1.6 ) then
|
||
|
|
y=isign*(0.322*z+0.4064)
|
||
|
|
return
|
||
|
|
elseif( z.le. 3.0 ) then
|
||
|
|
y=isign*(0.0524*z+0.8378)
|
||
|
|
return
|
||
|
|
elseif( z.lt. 7.0 ) then
|
||
|
|
y=isign*(0.0012*z+0.9914)
|
||
|
|
return
|
||
|
|
else
|
||
|
|
y=isign*0.9998
|
||
|
|
return
|
||
|
|
endif
|
||
|
|
end subroutine pltanh
|