Hi,
first thx for your patience with me, your helped me alot :)
you have mentioned in an post how i can convert strings to date object like
this:
dataView.setColumns([{
> type: 'date',
> label: data.getColumnLabel(0),
> calc: function (dt, row) {
> var dateString = dt.getValue(row, 0).toString();
> var year = dateString.substring(0, 4);
> var month = dateString.substring(4, 2); // javascript uses
> 0-indexed months (ie, January is 0 not 1), so you may need to subtract 1
> from this if you haven't already accounted for it
> var day = dateString.substring(6, 2);
> return new Date(year, month, day);
> }
> }, 1, 2]);
But can i make this more flexible? the date string can also look like this
"01-10-1980".. i want that a user can set a pattern in an input field so
that it automatically parses the string to a date object.
Can i do this with the google.visualization.DateFormat({pattern: "EEE, MMM
d, ''yy"}); this is from the examples.. ?
Am Montag, 24. März 2014 17:03:13 UTC+1 schrieb cyb:
>
> Hi,
>
> i have the following code:
>
>
> var data = new google.visualization.arrayToDataTable([
> ['date','column1','column2'],
> [20111001,2,3],
> [20111002,5,6],
> [20111003,8,9],
> [20111004,11,12] ]);
>
>
> var dataView = new google.visualization.DataView(data);
>
> var chart = new
> google.visualization.LineChart(document.getElementById('chart_div'));
>
> chart.draw(dataView, options);
>
>
> This draws me a line chart but if i replace the LineChart with this: chart
> = new google.visualization.PieChart(document.getElementById('chart_div'));
> i get this error: "Pie chart should have a first column of type string"
> What is now the best an easiest way to convert the data from a line in a
> pie chart? I want switch between a pie and a line chart and all should use
> the same data-array. Or can i disable the check that the first value must
> be a string !?
> And then i want select different values with dataView.setColumns(); so
> that i can determine which data is showing in my chart.
>
> And second question can i convert the date- column to a real date !?
> 20111001 is Year 2011 Month: 10 and Day: 01 ?
>
>
>
> Best regards cyb
>
>
>
>
>
>
>
>
>
>
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