sksurv.util.Surv#

class sksurv.util.Surv[source]#

Helper class to construct structured array of event indicator and observed time.

__init__()#

Methods

__init__()

from_arrays(event, time[, name_event, name_time])

Create structured array.

from_dataframe(event, time, data)

Create structured array from data frame.

static from_arrays(event, time, name_event=None, name_time=None)[source]#

Create structured array.

Parameters:
  • event (array-like) – Event indicator. A boolean array or array with values 0/1.

  • time (array-like) – Observed time.

  • name_event (str|None) – Name of event, optional, default: ‘event’

  • name_time (str|None) – Name of observed time, optional, default: ‘time’

Returns:

y – Structured array with two fields.

Return type:

np.array

static from_dataframe(event, time, data)[source]#

Create structured array from data frame.

Parameters:
  • event (object) – Identifier of column containing event indicator.

  • time (object) – Identifier of column containing time.

  • data (pandas.DataFrame) – Dataset.

Returns:

y – Structured array with two fields.

Return type:

np.array