section l of routines in global.i

all functions - l

l2ll


    z = l2ll(x)  


convert 2-by-dims 32 bit integer X to 64 bit integer  
(only works if sizeof(long)=8)  
 Interpreted function, defined at i/idlsave.i   line 316

lagrange


    lagrange  


  
     Interpreted function, defined at i/demo3.i   line 78

laguerre


    laguerre(a,x)  


Given the coefficients a(1:m+1) of the m'th degree  
complex polynomial Sum(a(i)*x^(i-1)) and a guess x, returns a root.  
See Numerical Recipes (Press, et. al., Cambridge Univ. Press 1988),  
section 9.5.  
Interpreted function, defined at i/zroots.i   line 70

laplacian


    laplacian  


  
     Interpreted function, defined at i/demo2.i   line 158

lcm


    lcm(a,b)  


returns the LCM (least common multiple) of A and B, which must  
be one of the integer data types.  A and B may be conformable  
arrays; the semantics of the lcm call are the same as any other  
binary operation.  
The absolute values of A and B are taken before the operation  
commences; if either A or B is 0, the return value will be 0.  
Interpreted function, defined at i/gcd.i   line 47

SEE ALSO: plwf, light3

limit3


    limit3, xmin,xmax, ymin,ymax  
 or limit3, xmin,xmax, ymin,ymax, zmin,zmax  


Set the 3D axis limits for use with the cage.  
Use keyword aspect=[ax,ay,az] to set the aspect ratios of the  
cage to ax:ay:az -- that is, the ratios of the lengths of the  
cage axes will become ax:ay:az.  
Interpreted function, defined at i/pl3d.i   line 181

SEE ALSO: cage3, range3, plwf, plwf, orient3

limits


    limits  
 or limits, xmin, xmax, ymin, ymax,  
    square=0/1, nice=0/1, restrict=0/1  
 or old_limits= limits()  
 or limits, old_limits  


In the first form, restores all four plot limits to extreme values.  
In the second form, sets the plot limits in the current coordinate  
system to XMIN, XMAX, YMIN, YMAX, which may be nil or omitted to  
leave the corresponding limit unchanged, a number to fix the  
corresponding limit to a specified value, or the string "e" to  
make the corresponding limit take on the extreme value of the  
currently displayed data.  
If present, the square keyword determines whether limits marked  
as extreme values will be adjusted to force the x and y scales  
to be equal (square=1) or not (square=0, the default).  
If present, the nice keyword determines whether limits will be  
adjusted to nice values (nice=1) or not (nice=0, the default).  
There is a subtlety in the meaning of "extreme value" when one  
or both of the limits on the OPPOSITE axis have fixed values --  
does the "extreme value" of the data include points which  
will not be plotted because their other coordinate lies outside  
the fixed limit on the opposite axis (restrict=0, the default),  
or not (restrict=1)?  
If called as a function, limits returns an array of 5 doubles;  
OLD_LIMITS(1:4) are the current xmin, xmax, ymin, and ymax,  
and int(OLD_LIMITS(5)) is a set of flags indicating extreme  
values and the square, nice, restrict, and log flags.  
In the fourth form, OLD_LIMITS is as returned by a previous  
limits call, to restore the limits to a previous state.  
In an X window, the limits may also be adjusted interactively  
with the mouse.  Drag left to zoom in and pan (click left to zoom  
in on a point without moving it), drag middle to pan, and click  
(and drag) right to zoom out (and pan).  If you click just above  
or below the plot, these operations will be restricted to the  
x-axis; if you click just to the left or right, the operations  
are restricted to the y-axis.  A ctrl-left click, drag, and  
release will expand the box you dragged over to fill the plot  
(other popular software zooms with this paradigm).  If the  
rubber band box is not visible with ctrl-left zooming, try  
ctrl-middle or ctrl-right for alternate XOR masks.  Such  
mouse-set limits are equivalent to a limits command specifying  
all four limits EXCEPT that the unzoom command can revert to  
the limits before a series of mouse zooms and pans.  
Holding the shift key and pressing the left mouse button is  
equivalent to pressing the middle mouse button.  Similarly,  
pressing meta-left is equivalent to the right button.  This  
permits access to the middle and right button functions on  
machines (e.g.- most laptops) with two button or one button  
mice.  
The limits you set using the limits or range functions carry over  
to the next plot -- that is, an fma operation does NOT reset the  
limits to extreme values.  
Builtin function, documented at i0/graph.i   line 771

SEE ALSO: plsys, range, logxy, zoom_factor, unzoom, plg, viewport

ln_gamma


    ln_gamma(z)  


returns natural log of the gamma function.  
Error is less than 1e-13 for real part of z>=1.  
Use lngamma if you know that all z>=1, or if you don't care much about  
accuracy for z<1.  
Interpreted function, defined at i/gamma.i   line 16