Google Chart Api - Custom Axis Step - google-visualization

Question

I have my chart working ok, however I would like to use a custom step for my vertical y-axis. At the moment it seems to be automatic and is spaced out as below:
1,500,000
3,000,000
4,500,000
I would prefer it to be:
100,000
200,000
300,000
and so on...
Is there any way I can set this, I have looked through all the documentation but can't figure it out.
Here is my code:
var chart = new google.visualization.LineChart(document.getElementById('chart'));
chart.draw(chartData, { width: 1600, height: 900, title: 'Company Performance',
yAxis: { gridlineColor: '#ff0000' },
xAxis: { gridlineColor: '#ff0000' }
}
);
My data is company profit for each week of the year, y-axis is profit, x-axis is the week number.
Hope somebody can help.
Paul

Answer 1

this is how I do it:
var options = {
vAxis: { // same thing for horisontal, just use hAxis
viewWindow: { // what range will be visible
max: 120,
min: 0
},
gridlines: {
count: 12 // how many gridlines. You can set not the step, but total count of gridlines.
}
}
};
all the best ;)

Answer 2

For as far as I know this cannot be done automatically with Google Charts settings.
I've written a javascript function to do this.
To use it you can create a nice sequence that can be used as ticks for the vertical axis:
var prettyTicks = getChartTicks(0, chartData.getColumnRange(1).max);
The line for the xAxis should be changed to apply the ticks:
yAxis: { gridlineColor: '#ff0000', ticks: prettyTicks },
Here is the javascript method to create the ticks. It will create a tick for each value of 10 and if that creates too many ticks then it will do this for each 100 or 1000 etc.
// Creates an array of values that can be used for the tick property of the Google Charts vAxis
// The values provide a nice scale to have a clean view.
var getChartTicks = function (min, max) {
// settings
var maxTicks = 8;
var tickSize = 10;
// determine the range of the values and the number of ticks
var newMin;
var newMax;
var nrOfTicks;
var appliedTickSize = 1;
while (newMin == null || nrOfTicks > maxTicks) {
appliedTickSize *= tickSize;
newMin = Math.floor(min / appliedTickSize) * appliedTickSize;
newMax = Math.ceil(max / appliedTickSize) * appliedTickSize;
nrOfTicks = (newMax - newMin) / appliedTickSize;
}
// generate the tick values which will be applied to the axis
var ticks = new Array();
var i = 0;
for (var v = newMin; v <= newMax; v += appliedTickSize) {
ticks[i++] = v;
}
return ticks;
}
So to summarize, after adding this method your code could then be changed to:
var prettyTicks = getChartTicks(0, chartData.getColumnRange(1).max);
var chart = new google.visualization.LineChart(document.getElementById('chart'));
chart.draw(chartData, { width: 1600, height: 900, title: 'Company Performance',
yAxis: { gridlineColor: '#ff0000', ticks: prettyTicks },
xAxis: { gridlineColor: '#ff0000' }
}
);

Answer 3

Hi Please refer google chart api.There are several parameters available according to your requirement like
chbh = Bar width and spacing ...
chco = Series colors ...
chd = Chart data string...
chdl,chdlp, chdls=Chart legend text and style...
chds Scale for text format with custom range...
chem = Dynamic icon markers...
for more information
http://code.google.com/apis/chart/image/docs/chart_params.html