You can enter the data with offset values like you want - just set the
points where a given series has no data to null, eg:
DataTable data = DataTable.create();
data.addColumn(ColumnType.DATETIME, "1");
data.addColumn(ColumnType.NUMBER, "Random Numbers");
data.addColumn(ColumnType.NUMBER, "More Numbers");
data.addRows(4);
data.setValue(0, 0, new Date(2013, 10, 14, 4, 4));
data.setValue(0, 1, 4);
data.setValue(0, 2, null);
data.setValue(1, 0, new Date(2013, 10, 14, 4, 5));
data.setValue(1, 1, null);
data.setValue(1, 2, 5);
data.setValue(2, 0, new Date(2013, 10, 14, 5, 4));
data.setValue(2, 1, 3);
data.setValue(2, 2, null);
data.setValue(3, 0, new Date(2013, 10, 14, 5, 5));
data.setValue(3, 1, null);
data.setValue(3, 2, 1);
On Monday, October 14, 2013 8:11:22 PM UTC-4, Da Ka wrote:
>
> This seems to be a quite simple problem, but so far I could not find a
> solution:
>
> I have 2 series of values, that both fall into a certain time range,
> however, they are not parallel.
> Example:
> 1st series starts at 12:00, and then has values every 5 minutes, like:
> 12:05, 12:10, 12:15, 12:30 ...
> 2nd series starts at 12:03, and then has values every 5 minutes, like:
> 12:03, 12:08, 12:13, 12:18 ...
>
> *Is it somehow possible to display both series in the same line chart?
> *(Series
> 2 would be "shifted" for 3 minutes on the x axis)
> I am using DataTable to populate the graph, but that requires
> "synchronized" values. So if I put the date 12:05 on the axis, I also have
> to populate it for both series - which stands in conflict with the second
> series.
>
> I tried something like this:
>
> private static DataTable getTestData()
> {
> DataTable data = DataTable.create();
> data.addColumn(ColumnType.DATETIME, "1");
> data.addColumn(ColumnType.NUMBER, "Random Numbers");
> data.addColumn(ColumnType.DATETIME, "2");
> data.addColumn(ColumnType.NUMBER, "More Numbers");
> data.addRows(2);
>
> data.setValue(0, 0, new Date(2013, 10, 14, 4, 4));
> data.setValue(0, 1, 4);
> data.setValue(0, 2, new Date(2013, 10, 14, 4, 5));
> data.setValue(0, 3, 5);
> data.setValue(1, 0, new Date(2013, 10, 14, 5, 4));
> data.setValue(1, 1, 3);
> data.setValue(1, 2, new Date(2013, 10, 14, 5, 5));
> data.setValue(1, 3, 1);
> }
>
> but that is *not allowed* (All series on a given axis must be of the same
> data type).
>
> I looked into multiple axis but I could not figure out how to use that in
> Java using the GWT-API (Also I am not sure that would solve the problem).
>
> Maybe I am overlooking something simple - any suggestions would be welcome!
>
> Best regards,
> DaKa
>
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