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User Documentation |
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SUMMARY: fields | routine DETAILS: routine | ||||||||||
./guide astack.pro
astack |
Function to return the value of a specific element of the stack.
; stack contains [ 10, 12, 14, 20, 25, 28] to begin my_elem = astack(3) ; my_elem contains the value 20A more substantive use. The following procedure averages all of the data from scans listed in the stack.
pro myavg,_extra=extra freeze for i=0,!g.acount-1 do begin getnod,astack(i),plnum=0,units='Jy',_extra=extra accum getnod,astack(i),plnum=1,units='Jy',_extra=extra accum endfor ave unfreeze endIn this example, select is used with astack to flag data using flagrec. This is useful if the data isn't easily described using the parameters available in the flag procedure. The end result here is that all of the data having a source equal to "Orion" and polarization equal to "RR" in IF number 3 is flagged from channel 500 through channel 520.
emptystack ; clear the stack first select, source='Orion', polarization='RR', ifnum=3 ; populate the stack a = astack(count=count) if count gt 0 then flagrec,a,bchan=500,echan=520,idstring='RFI-Orion'
Parameters | |
elem |
The index of the element to return. If elem is omitted, the entire contents of the stack up through (!g.acount-1) is returned as an array. |
Keywords | |
count |
The number of elements returned (0, 1 or !g.acount). |