Custom formatter function for tickFormat

[jampekka]

By examining the axis._getFormat method it seems that axis.tickFormat must be a string that will get passed to d3.format. Is there a reason why this couldn't also be any function that takes the value and returns a string? This would make the formatting even more flexible.

This can be accomplished by monkeypatching that seems to work without problems in my simple usage. Eg:

function my_custom_format(value) {
    // Any transformation to string here
    return "prefix" + parseInt(value*100) + "postfix";  
}
var ax = chart.addMeasureAxis('x', 'value');
ax._getFormat = function() { return my_custom_format; }; 

However, such ugliness would be unnecessary if axis._getFormat would check if the axis.tickFormat is a function and returning it if so.

If preferred, I can make a pull request of such a feature, but the line or two is probably faster added by an existing commiter if this proposal is accepted.

[johnkiernander]

I like it, good idea. It should be quite a simple addition, I'll work it into the next release.

[ses4j]

+1.

[raghavi92]

Is there an update for this?