Hi Kostas,
You can absolutely dynamically add trendlines! However, the chart doesn't
automatically detect changes in the options or the DataTable (JavaScript
makes it kind of difficult to monitor object properties), so you have to
explicitly redraw the chart with the new options. I'm also not really sure
what you're trying to do with your temp string, since the 'trendlines'
option expects a JavaScript object, and not a string; so even if you were
redrawing, what you're doing would not work. Also, options doesn't have a
length property (since it is not an array), so your entire if loops won't
work properly.
So a sketch of the fixed code would look something like:
var options = {
width: 100,
height: 100
};
for (var i = 0; i < NUMBER_OF_TRENDLINES; i++) {
options[i] = {
color: 'black',
lineWidth: 6
}
}
chart.draw(data, options);
On Mon, Jul 27, 2015 at 3:47 PM Kostas Poulakidas <[email protected]>
wrote:
> Hello, I have a list of the options the user want to represent in a
> LineChart. He selects the options and the he draw the Chart.
> Representing the data is ok.
>
> And the result is smh like this https://jsfiddle.net/h7k273yb/
>
> My problem is that I can not dynamically add trendiness .
>
> *I tried with a loop.*
>
> var options= {
> width:100,
> height:100
> };
>
>
> var temp=" " ;
>
> for (i = 0; i < options.length; i++) {
> temp+= i+": { \
> color: 'black',\
> lineWidth: 6,\
> }";
>
> }
>
>
> options.trendlines=temp;
>
>
> *Also I tried with setOption*
>
> chart.setOption('trendlines', temp);
>
>
> None of them worked! Any ideas??
>
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