Google Chart printing vAxis format selector as well as number - google-visualization

Question

I have a really simple implementation of a classic google line chart but when applying vAxis: { format: 'none' } it is printing none to the chart as well as correctly formatting the number.
Going through the documentation I have tried options['vAxis']['format'] = 'none' just to see if that would magically solve it for me but to no success.
Any help greatly appreciated.
google.charts.load('current', { packages: ['corechart', 'line'] });
google.charts.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Day of Week');
data.addColumn('number', 'Pressure');
//console.log(outer[0]);
data.addRows(outer[0]);
var options = {
chart: {
title: 'Pressure Forecast',
subtitle: ''
},
width: 900,
height: 500,
vAxis: {
format: 'none'
}
};
var chart = new google.visualization.LineChart(document.getElementById('pressureChart'));
chart.draw(data, options);}

Answer 1

#WhiteHat was correct vAxis: { format: '0' } has done as needed and overridden the default of { format: 'short' }.
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Day of Week');
data.addColumn('number', 'Pressure');
//console.log(outer[0]);
data.addRows(outer[0]);
var options = {
chart: {
title: 'Pressure Forecast',
subtitle: ''
},
width: 900,
height: 500,
vAxis: {
format: '0'
}
};