File: bounds

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wims 2%3A4.29a%2Bdfsg1-3
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!if $wims_read_parm!=slib_header
  !goto proc
!endif

slib_author=Gang, XIAO

slib_example= sin(x^4)*x^2, x,0,1
!exit

:proc
!distribute items $wims_read_parm into slib_fn,slib_var,slib_x1,slib_x2,slib_steps
slib_fn=!rawmath $slib_fn
slib_var=!varlist $slib_var
slib_var=!item 1 of $slib_var
!default slib_var=x
slib_x1=$[$slib_x1]
!if $slib_x1=$empty or $slib_x1 isitemof NaN,Inf
  slib_x1=0
!endif
slib_x2=$[$slib_x2]
!if $slib_x2=$empty or $slib_x2 isitemof NaN,Inf
  slib_x2=1
!endif
!bound slib_steps between integer 1 and 1000 default 100
slib_step=$[($slib_x2-($slib_x1))/$slib_steps]
slib_vals=!values $slib_fn for $slib_var=$slib_x1 to $slib_x2 step $slib_step
slib_vals=!replace item NaN by $ in $slib_vals
slib_vals=!nonempty items $slib_vals
slib_vals=!sort numeric items $slib_vals
slib_min=!item 1 of $slib_vals
slib_max=!item -1 of $slib_vals
slib_out=$slib_min,$slib_max