# ngridpts.m

Estimates the minimum number of spatial grid points necessary to have a valid treatment of gradient driven experiments with explicit digitization of spatial dimensions.

## Syntax

    n=ngridpts(grad_amps,grad_durs,isotope,max_coh_order)


## Description

The function checks the Larmor condition for the tightest possible gradient spiral.

## Arguments

  grad_amps     - a row vector of all gradient amplitudes
in the sequence, T/m

in the sequence, s

isotope       - the highest magnetogyric ratio isotope in
the spin system, e.g. '1H'

max_coh_order - maximum order of coherence (either positive
or negative) expected during the experiment
being simulated

sample_size   - spatial extent of the sample, m


## Outputs

  n - the minimum recommended number of discretisation points


## Notes

The function returns the minimum number of points, it may in practice be necessary to have several times the number, depending on your accuracy requirements.