MUL - Multiply two or more, real or complex images

PURPOSE

Multiplies two or more images, volumes or Fourier transforms together and places result in an output file. All inputs must have same dimensions.   Example.

SEE ALSO

MUL 2	[Pairwise multiply series of real or complex images]
MUL M	[Multiply 1st complex file by 2nd conjugated file]
DIV	[Divide real or complex files]
DIV 2	[Pairwise divide series of real or complex images]

USAGE

.OPERATION: MUL

.INPUT FILE: PIC001
[Enter the name of the first file to be multiplied. (Header positions from this file are transferred to output.)]

.MULTIPLIER FILE: PIC002
[Enter the name of the file containing multiplier. Can be same as the first input file.]

.OUTPUT FILE: PIC999
[Enter the name of output file. Can be same as either input file.]

SPIDER will ask:

.MULTIPLIER FILE: *
[Enter '*' if no more files are to be processed.]

NOTES

1. If multiple multiplier files (e.g. PIC002, PIC003, PIC004...) are used the final output corresponds to their product: PIC999 = PIC001 * PIC002 * PIC003 ...

2. To multiply by a long series of images within a procedure you can use the following set of operations:

    
    [num] = 1 
    CP                ; Create constant value file 
      inp{***[num]}   ; First  file                 (input) 
      out999          ; File name                 (output) 
    DO  [num]=2,4     ; Creates running multiplicand 
      MUL             ; Add files operation  
        out999        ; First  file               (input)  
        inp{***[num]} ; Second file               (input) 
        out999        ; Multiplied file           (output) 
        *             ; Put asterick here  
    ENDDO 
   

SUBROUTINES

ADD

CALLER

UTIL2