#!/usr/bin/env python3.8
# coding: latin-1
# (c) Massachusetts Institute of Technology 2015-2018
# (c) Brian Teague 2018-2022
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
cytoflowgui.workflow.operations.pca
-----------------------------------
"""
from traits.api import (HasTraits, provides, Str, Property, observe,
List, Dict, Any, Bool)
from cytoflow.operations.pca import PCAOp
import cytoflow.utility as util
from ..serialization import camel_registry, traits_repr, dedent
from ..subset import ISubset
from .operation_base import IWorkflowOperation, WorkflowOperation
PCAOp.__repr__ = traits_repr
[docs]class Channel(HasTraits):
channel = Str
scale = util.ScaleEnum
def __repr__(self):
return traits_repr(self)
[docs]@provides(IWorkflowOperation)
class PCAWorkflowOp(WorkflowOperation, PCAOp):
# use a list of _Channel instead of separate lists/dicts of channels/scales
channels_list = List(Channel, estimate = True)
channels = Property(List(Str),
observe = '[channels_list.items,channels_list.items.channel,channels_list.items.scale]')
scale = Property(Dict(Str, util.ScaleEnum),
observe = '[channels_list.items,channels_list.items.channel,channels_list.items.scale]')
# add 'estimate', 'apply' metadata
name = Str(apply = True)
by = List(Str, estimate = True)
num_components = util.PositiveCInt(2, allow_zero = False, estimate = True)
whiten = Bool(False, estimate = True)
# add the 'estimate_result' metadata
_pca = Dict(Any, Any, estimate_result = True, transient = True)
# override the base class's "subset" with one that is dynamically generated /
# updated from subset_list
subset = Property(Str, observe = "subset_list.items.str")
subset_list = List(ISubset, estimate = True)
# bits for channels
@observe('[channels_list:items,channels_list:items.channel,channels_list:items.scale]')
def _channels_updated(self, event):
self.changed = 'channels_list'
def _get_channels(self):
return [c.channel for c in self.channels_list]
def _get_scale(self):
return {c.channel : c.scale for c in self.channels_list}
# bits to support the subset editor
@observe('subset_list:items.str')
def _on_subset_changed(self, _):
self.changed = 'subset_list'
# MAGIC - returns the value of the "subset" Property, above
def _get_subset(self):
return " and ".join([subset.str for subset in self.subset_list if subset.str])
[docs] def estimate(self, experiment):
for i, channel_i in enumerate(self.channels_list):
for j, channel_j in enumerate(self.channels_list):
if channel_i.channel == channel_j.channel and i != j:
raise util.CytoflowOpError("Channel {0} is included more than once"
.format(channel_i.channel))
super().estimate(experiment, subset = self.subset)
[docs] def apply(self, experiment):
if not self._pca:
raise util.CytoflowOpError(None, 'Click "Estimate"!')
return super().apply(experiment)
[docs] def clear_estimate(self):
self._pca = {}
self._scale = {}
[docs] def get_notebook_code(self, idx):
op = PCAOp()
op.copy_traits(self, op.copyable_trait_names())
return dedent("""
op_{idx} = {repr}
op_{idx}.estimate(ex_{prev_idx}{subset})
ex_{idx} = op_{idx}.apply(ex_{prev_idx})
"""
.format(repr = repr(op),
idx = idx,
prev_idx = idx - 1,
subset = ", subset = " + repr(self.subset) if self.subset else ""))
### Serialization
@camel_registry.dumper(PCAWorkflowOp, 'pca', version = 1)
def _dump(op):
return dict(name = op.name,
channels_list = op.channels_list,
num_components = op.num_components,
whiten = op.whiten,
by = op.by,
subset_list = op.subset_list)
@camel_registry.loader('pca', version = 1)
def _load(data, version):
return PCAWorkflowOp(**data)
@camel_registry.dumper(Channel, 'pca-channel', version = 1)
def _dump_channel(channel):
return dict(channel = channel.channel,
scale = channel.scale)
@camel_registry.loader('pca-channel', version = 1)
def _load_channel(data, version):
return Channel(**data)