section e of routines in global.i

all functions - e

earth_tilt


    earth_tilt  


  
     Interpreted function, defined at i/kepler.i   line 429

edit_times


    edit_times, file  
 or edit_times, file, keep_list  
 or edit_times, file, keep_list, new_times, new_ncycs  


edits the records for FILE.  The KEEP_LIST is a 0-origin index list  
of records to be kept, or nil to keep all records.  The NEW_TIMES  
array is the list of new time values for the (kept) records, and  
the NEW_NCYCS array is the list of new cycle number values for the  
(kept) records.  Either NEW_TIMES, or NEW_NCYCS, or both, may be  
nil to leave the corresponding values unchanged.  If non-nil,  
NEW_TIMES and NEW_NCYCS must have the same length as KEEP_LIST,  
or, if KEEP_LIST is nil, as the original number of records in  
the file.  If KEEP_LIST, NEW_TIME, and NEW_NCYCS are all omitted  
or nil, then edit_times removes records as necessary to ensure  
that the remaining records have monotonically increasing times,  
or, if no times are present, monotonically increasing ncycs.  
(The latest record at any given time/ncyc is retained, and earlier  
records are removed.)  
In no case does edit_times change the FILE itself; only Yorick's  
in-memory model of the file is altered.  
Builtin function, documented at i0/std.i   line 3316

SEE ALSO: elliptic, ellip_e, ell_f

eps


    eps, name  


writes the picture in the current graphics window to the Encapsulated  
PostScript file NAME+".eps" (i.e.- the suffix .eps is added to NAME).  
This function requires ghostscript.  Any hardcopy file associated with  
the current window is first closed, but the default hardcopy file is  
unaffected.  As a side effect, legends are turned off and color table  
dumping is turned on for the current window.  
The external variable EPSGS_CMD contains the command to start  
ghostscript.  
Interpreted function, defined at i0/graph.i   line 198

SEE ALSO: pdf, epsi, hcps, window, fma, hcp, hcp_finish, plg

epsi


    eps, name  


writes the picture in the current graphics window to the Encapsulated  
PostScript file NAME+".epsi" (i.e.- the suffix .epsi is added to NAME).  
The eps function requires the ps2epsi utility which comes with the  
project GNU Ghostscript program.  Any hardcopy file associated with  
the current window is first closed, but the default hardcopy file is  
unaffected.  As a side effect, legends are turned off and color table  
dumping is turned on for the current window.  
The external variable PS2EPSI_FORMAT contains the format for the  
command to start the ps2epsi program.  
Interpreted function, defined at i0/graph.i   line 178

SEE ALSO: eps, hcps, window, fma, hcp, hcp_finish, plg

eq_nocopy


    eq_nocopy, y, x  


is the same as  
       y= x  
except that if x is an array, it is not copied, even if it is  
not a temporary (i.e.- an expression).  Having multiple variables  
reference the same data can be confusing, which is why the default  
= operation copies the array.  The most important use of eq_nocopy  
involves pointers or lists:  
       y= *py  
       z= _car(list)  
always causes the data pointed to by py to be copied, while  
       eq_nocopy, y, *py  
       eq_nocopy, z, _car(list)  
does not copy the data - often more nearly what you wanted.  
Note that scalar int, long, and double variables are always copied,  
so you cannot count on eq_nocopy setting up an "equivalence"  
between variables.  
Builtin function, documented at i0/std.i   line 326

erf


    erf(x)  


return erf(x), 2./sqrt(pi) * integral[0 to x](exp(-t^2)*dt)  
 Interpreted function, defined at i/dawson.i   line 50

SEE ALSO: print, write, batch, catch

evolve


    evolve, time1  
 or evolve, time1, time0  


Step the hydro calculation forward to TIME1,  
starting with the initial conditions in the  
RT, z, and v arrays at time TIME0 (default 0.0  
if omitted).  The calculation also depends on  
the constants M (mass/area/zone) and gammaM1  
(gamma-1 for the gamma-law equation of state).  
The pressure array p is updated in addition to  
the primary state arrays RT, z, and v.  
Boundary conditions are specified by setting  
either a boundary pressure or a boundary  
velocity at each end of the fluid column.  
bc0_v   - Boundary velocity at z(0), or []  
          if z(0) has pressure BC.  
bc0_p   - Boundary pressure beyond z(0).  
bc0_time  - If bc0_v or bc0_p is an array,  
            bc0_time is an array of the same  
            length specifying the corresponding  
            times for time dependent BCs.  
bc0_Z   - Acoustic impedance at z(0) if bc0_v  
          is nil (default is 0).  
bcN_v, bcN_p, bcN_time, and bcN_Z have the same  
meanings for the z(n_zones) boundary.  
The worker routines OutputResults and  
TakeStep must be supplied.  
Interpreted function, defined at i/demo1.i   line 119

exit


    exit  


Builtin function, documented at i0/std.i   line 3439

SEE error

exp


    exp(x)  


returns the exponential function of its argument (inverse of log).  
Builtin function, documented at i0/std.i   line 654

SEE ALSO: expm1, log, log10, sinh, cosh, tanh, sech, csch

expm1


    expm1(x)  
 or expm1(x, ex)  


return exp(X)-1 accurate to machine precision (even for X<<1)  
in the second form, returns exp(x) to EX  
Interpreted function, defined at i0/std.i   line 672