264 lines
10 KiB
Python
264 lines
10 KiB
Python
import pandas as pd
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import numpy as np
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import scipy.signal as signal
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import matplotlib as mpl
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mpl.use("TkAgg") # fixes focus issues for me
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import matplotlib.pyplot as plt
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from time import sleep
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from random import choice as r_choice
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from sys import exit
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import os
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import re
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if __name__ == "__main__":
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if __package__ is None:
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# make relative imports work as described here: https://peps.python.org/pep-0366/#proposed-change
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__package__ = "teng_ml"
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import sys
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from os import path
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filepath = path.realpath(path.abspath(__file__))
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sys.path.insert(0, path.dirname(path.dirname(filepath)))
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from .util.transform import Normalize
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from .util.data_loader import get_datafiles
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from .util.file_io import get_next_digits
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file = "/home/matth/Uni/TENG/teng_2/data/2023-06-28_foam_black_1_188mm_06V001.csv"
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class InteractiveDataSelector:
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re_file = r'\d{4}-\d{2}-\d{2}_([a-zA-Z0-9_]+)_([a-zA-Z0-9]+)_(\d+(?:\.\d+)?mm)_(\d+V)(\d+)\.csv'
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re_index_group_nr = 5 # group number of the index part of the filename
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"""
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Go through all .csv files in a directory, split the data and exclude sections with the mouse, then write the sections as single files into a new directory
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"""
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def __init__(self, in_dir, out_dir, keep_index=True, split_at_exclude=True):
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"""
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@param keep_index:
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If True: append the split number as triple digits to the existing filename (file001.csv -> file001001.csv, file001002.csv ...)
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Else: remove the indices from the filename before adding the split number (file001.csv -> file001.csv, file002.csv ...)
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@param split_at_exclude:
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If True: When excluding an area, split the data before and after the excluded zone
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Else: remove the excluded zone and join the previous and later part
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"""
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if os.path.isdir(out_dir):
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if os.listdir(out_dir):
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raise ValueError(f"'out_dir' = '{out_dir}' is not empty")
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else:
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os.makedirs(out_dir)
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self._out_dir = out_dir
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self._in_dir = in_dir
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self._in_files = os.listdir(in_dir)
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self._in_files.sort()
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for i in reversed(range(len(self._in_files))):
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if not re.fullmatch(InteractiveDataSelector.re_file, self._in_files[i]):
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print(f"Dropping non-matching file '{self._in_files[i]}'")
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self._in_files.pop(i)
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if not self._in_files:
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raise ValueError(f"No matching files in 'in_dir' = '{in_dir}'")
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self._history: list[tuple[str, list]] = [] # (in_file, [out_files...])
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self._keep_index = keep_index
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self.split_at_exclude = split_at_exclude
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plt.ion()
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self._fig, self._ax = plt.subplots()
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mpl.rcParams['keymap.save'].remove('s') # s is used for split
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mpl.rcParams['keymap.quit'].remove('q')
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self._fig.canvas.mpl_connect("button_press_event", lambda ev: self._fig_on_button_press(ev))
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self._fig.canvas.mpl_connect("key_press_event", lambda ev: self._fig_on_key_press(ev))
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def run(self):
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self._next_file()
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while plt.fignum_exists(self._fig.number):
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plt.pause(0.01)
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def _set_titles(self):
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help_str = "[(e)xclude, (s)plit, (w)rite+next, (U)ndo last file, (Q)uit]"
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self._fig.suptitle(f"{help_str}\nuse left click to select, right click to undo\ncurret mode: {self._mode}")
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def _undo_file(self):
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if len(self._history) == 0:
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print("Nothing to undo")
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return
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# delete written files
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for outfile in self._history[-1][1]:
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print(f"Deleting '{outfile}'")
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os.remove(outfile)
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self._in_files.insert(0, self._history[-1][0])
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self._history.pop()
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self._next_file()
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def _next_file(self):
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# runtime stuff
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if len(self._in_files) == 0:
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raise IndexError("No more files to process")
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self._current_file = self._in_files.pop(0)
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self._current_dataframe = pd.read_csv(os.path.join(self._in_dir, self._current_file))
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self._current_array = self._current_dataframe.to_numpy()
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self._current_array = np.loadtxt(os.path.join(self._in_dir, self._current_file), skiprows=1, delimiter=",")
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# plot stuff
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self._splits_lines = None # vlines
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self._excludes_lines = None
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self._excludes_areas = [] # list of areas
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self._fig.clear()
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self._ax = self._fig.subplots()
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self._ax.plot(self._current_array[:,0], self._current_array[:,2])
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self._ax.set_xlabel(self._current_file)
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self._splits: list[int] = []
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self._excludes: list[int] = []
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self._mode = "exclude" # split or exclude
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self._set_titles()
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def _fig_on_button_press(self, event):
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"""
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left click: set split / exclude section (depends on mode)
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right click: undo last action of selected mode
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"""
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if event.xdata is None: return
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if event.xdata in self._excludes or event.xdata in self._splits: return
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if event.button == 1: # left click, add position
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if self._mode == "split":
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self._splits.append(event.xdata)
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else:
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self._excludes.append(event.xdata)
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elif event.button == 3: # right click, undo
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if self._mode == "split":
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if len(self._splits) > 0:
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self._splits.pop()
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else:
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if len(self._excludes) > 0:
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self._excludes.pop()
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self._update_lines()
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def _fig_on_key_press(self, event):
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"""
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s: set split mode
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e: set exclude mode
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w: write and got to next file
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Q: quit all
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"""
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if event.key == 's':
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self._mode = "split"
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elif event.key == 'e':
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self._mode = "exclude"
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elif event.key == 'w':
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self._save_as_new_files()
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try:
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self._next_file()
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except IndexError:
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print(f"All files processed.")
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exit(0)
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elif event.key == 'U':
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self._undo_file()
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elif event.key == 'Q':
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print(f"Quitting before all files have been processed!")
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exit(1)
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self._set_titles()
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def _update_lines(self):
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# print(self._splits, self._excludes)
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ymin, ymax = self._ax.get_ylim()
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if self._splits_lines is not None: self._splits_lines.remove()
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self._splits_lines = self._ax.vlines(self._splits, ymin, ymax, color="b")
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if self._excludes_lines is not None: self._excludes_lines.remove()
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self._excludes_lines = self._ax.vlines(self._excludes, ymin, ymax, color="r")
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for area in self._excludes_areas:
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area.remove()
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self._excludes_areas.clear()
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excludes = self._excludes.copy()
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if len(excludes) % 2 == 1: excludes.pop() # only draw pairs
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excludes.sort()
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for i in range(1, len(excludes), 2):
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self._excludes_areas.append(self._ax.axvspan(excludes[i-1], excludes[i], facecolor='r', alpha=0.3))
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self._ax.set_ylim(ymin, ymax) # reset, since margins are added to lines
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self._fig.canvas.draw()
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def _get_next_filename(self):
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if self._keep_index:
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# 5th group is index
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match = re.fullmatch(InteractiveDataSelector.re_file, self._current_file)
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assert(type(match) is not None)
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basename = self._current_file[:match.start(InteractiveDataSelector.re_index_group_nr)]
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else:
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basename = self._current_file[:-4] # extension
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index = get_next_digits(basename, self._out_dir, digits=3)
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return f"{basename}{index}.csv"
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def _save_as_new_files(self):
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# convert timestamps to their closest index
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excludes_idx = [np.abs(self._current_array[:,0] - t).argmin() for t in self._excludes]
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splits_idx = [np.abs(self._current_array[:,0] - t).argmin() for t in self._splits]
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if self.split_at_exclude:
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# split before the start of the exclucded range
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splits_idx += [ excludes_idx[i]-1 for i in range(0, len(excludes_idx), 2) ]
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# split after the end of the exclucded range
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splits_idx += [ excludes_idx[i]+1 for i in range(1, len(excludes_idx), 2) ]
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splits_idx = list(set(splits_idx)) # remove duplicates
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splits_idx.sort()
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df = self._current_dataframe.copy()
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# 1) remove excluded parts
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for i in range(1, len(excludes_idx), 2):
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df = df.drop(index=range(excludes_idx[i-1], excludes_idx[i]+1))
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# 2) splits
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new_frames = []
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start_i = df.index[0]
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for i in range(0, len(splits_idx)):
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end_i = splits_idx[i]
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# print(start_i, end_i)
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# check if valid start and end index
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if start_i in df.index and end_i in df.index:
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new_frames.append(df.loc[start_i:end_i])
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start_i = end_i + 1
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# append rest
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if start_i in df.index:
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new_frames.append(df.loc[start_i:])
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# 3) remove empty
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for i in reversed(range(len(new_frames))):
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if len(new_frames[i]) == 0:
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new_frames.pop(i)
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self._history.append((self._current_file, []))
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for frame in new_frames:
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filename = self._get_next_filename()
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pathname = os.path.join(self._out_dir, filename)
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# until now, frame is a copy of a slice
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frame = frame.copy()
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# transform timestamps so that first value is 0
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t_column_name = frame.columns[0]
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frame[t_column_name] -= frame.iloc[0][t_column_name]
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frame.to_csv(pathname, index=False)
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self._history[-1][1].append(pathname)
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print(f"Saved range of length {len(frame.index):04} to {pathname}")
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if __name__ == "__main__":
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import argparse
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parser = argparse.ArgumentParser("data_preprocess")
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parser.add_argument("in_dir")
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parser.add_argument("out_dir")
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parser.add_argument("-i", "--keep_index", action="store_true")
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parser.add_argument("-e", "--split_at_exclude", action="store_true")
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ns = parser.parse_args()
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selector = InteractiveDataSelector(ns.in_dir, ns.out_dir, keep_index=ns.keep_index, split_at_exclude=ns.split_at_exclude)
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selector.run()
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exit(2) # selector should exit in _fig_on_key_press
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