getnr

Purpose

Computes number of rows to read per iteration for a program that reads data from a disk file in a loop.

Format

nr = getnr(nsets, ncols)

Parameters:

• nsets (scalar) – estimate of the maximum number of duplicate copies of the data matrix read by readr() to be kept in memory during each iteration of the loop.

• ncols (scalar) – columns in the data file.

Returns:

nr (scalar) – number of rows readr() should read per iteration of the read loop.

Remarks

If __row is greater than 0, nr will be set to __row.

If an insufficient memory error is encountered, change __rowfac to a number less than 1.0 (e.g. 0.75). The number of rows read will be reduced in size by this factor.

Source

gauss.src

Globals

__row, __rowfac, __maxvec