Space requirements

The argument NWPAWC must be given a value large enough to accomodate in memory all histograms (1-D and 2-D) and all Ntuple headers and buffers, i.e.

$NWPAWC>\; 10000\; +\; \sum$_i=1^NFS_F(i) + ∑_i=1^N1S₁(i) + ∑_i=1^N2S₂(i) + ∑_i=1^NTS_N(i)

NF

Number of open files

$S$_F(i)

100+$LREC$_i , where LREC is the buffer size for file i, as specified in a call to HROPEN.

N1

Number of 1-D histograms

$S$₁(i)

Space occupied by 1-D histogram i, i.e.
40+(NCHAN+2)*PACK+IERR*(NCHAN+10)+IFUN*(NCHAN+10)

NCHAN

Number of channels in histogram

PACK

Packing factor (1. by default). See parameter VMX of HBOOK1.

IERR

1 if HBARX called, 0 otherwise.

IFUN

1 if the histogram has an associated function (HFUNC, fits or smoothing)

N2

Number of 2-D histograms

$S$₂(i)

Space occupied by 2-D histogram i, i.e.
40+(NCHANX+2)*(NCHANY+2)*PACK + space for projections, slices and bands (which are 1-D histograms).

NT

Number of Ntuples

$S$₂(i)

Space occupied by headers and buffers of Ntuple i (see routines HBOOKN and HBNT).