**PURPOSE**- Lists specified elements of a given image file. Output is placed in SPIDER's "RESULTS" file. Example.

**SEE ALSO****LI T**[List image values - on terminal] **LI D**[List image values - in Document file] **LI X**[List image values - in register variables] **PF G**[Profile an image row in a Gnuplot graph]

**USAGE**- .OPERATION: LI

- .INPUT FILE: PIC001

[Enter name of the input file.].HEADER, PIXEL, ROW, COLUMN, IMAGE, OR WINDOW (H/P/R/C/I/W) W

[Enter 'H' for image header, 'P' for listing a pixel, 'R' for listing row(s), 'C' for listing column(s), 'I' for listing a whole image, or 'W' for listing window from an image] - If "H" is chosen, SPIDER will ask:

.HEADER POSITION(S): 1,2,3

- If "P" is chosen, SPIDER will ask:

.COLUMN & ROW: 34 56

- If "R" is chosen, SPIDER will ask:

.ROW(S): 1-4

- If "C" is chosen, SPIDER will ask:

.COLUMN(S): 1-4

- If "I" is chosen and the input file is a volume, SPIDER will ask:

.SLICE(S): 55

- If "W" is chosen, SPIDER will ask:

.COLUMN(S): 20-30

.ROW(S): 20-30

- If "H" is not chosen, SPIDER will ask:

.FLOATING POINT OR INTEGER FORMAT OUTPUT (F/I): F

['I' for integer format is usually only useful for images which have integral values. The integer format is limited to the range: -9999999 ... 99999999.]- If "H" is not chosen, and the input file contains Fourier data, SPIDER will ask:

.FLOATING POINT OR INTEGER FORMAT OUTPUT (F/I): F

.PHASE / MOD LISTING(Y/N)?: N

[Enter 'N' for straight listing, enter 'Y' for phase/modulus listing. For phase/modulus listing the output is AMPLITUDE and PHASE. The phase is in degrees NOT in radians.

The corresponding rows of PIC001 will then be listed, putting the information in the RESULTS file. In the case of Fourier data, listed values are alternately real and imaginary parts of Fourier coefficients unless the phase/ mod option is chosen, in which case listed values are alternately moduli and phases of the coefficients.]

**NOTES**

- Hyphens can be used to specify the row numbers.

**SUBROUTINES**- LISTIT

**CALLER**- UTIL1

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