gs_quant.timeseries.datetime.prepend¶

Prepend data series

Parameters:: x (List[Series]) – an array of timeseries
Return type:: Series
Returns:: concatenated timeseries

Usage

For input series [\(x_1\), \(x_2\), … , \(X_n\)], takes data from series \(X_i\) until the first date for which \(X_{i+1}\) has data, useful when a higher quality series has a shorter history than a lower quality series.

Examples

Prepend two series:

>>> x = generate_series(100)
>>> y = generate_series(100)
>>> prepend([x, y])

See also

union()