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spectra

Various routines for analysis and preprocessing of spectral data.

Prerequisites

  1. numpy: basic data storage and manipulation
  2. scipy: signal processing
  3. lmfit: non-linear fitting
  4. matplotlib: plotting
  5. pandas: tables

Running

# add to $PYTHONPATH or add to system path
import sys
sys.path.append('spectra/')  # relative or absolute path to dir

import spectra as sp

# call appropriate functions
sp.get_xy('')

Contents

array_help

  • find_nearest
  • find_nearest_index
  • find_nearest_tolerance
  • copy_range
  • copy_range_array
  • copy_range_yarray
  • sort_by_list
  • sort_array_column
  • split_columns

background

*See (https://github.com/charlesll/rampy)[rampy] for better functions

calibrate

  • neon_peaks
  • calibrate
  • calibrate_x_data2
  • find_laser_wavelength
  • find_best_offset
  • find_best_offset2

convert

  • wl2wn
  • wl2rwn
  • wn2wl
  • rwn2wn
  • rwn2wl
  • absorption
  • nm2ev
  • nm2ev_xy
  • nm2ev_xyz

file_io

  • path
  • rpath
  • assure_path_exists
  • make_fname
  • write2col
  • getxy
  • clean_file
  • load_folder
  • quick_load_xy
  • list_all_files
  • write_json
  • read_json

filters

  • smooth_data
  • butter_lp_filter
  • butter_lowpass
  • butter_lowpass_filter
  • wicker
  • savgol_filter
  • butterworth_bandpass
  • resample

fitting

  • fit_peaks
  • split_and_fit
  • fit_data
  • fit_data_bg
  • output_results
  • fit_peak_table
  • batch_fit_single_peak
  • line_fit
  • exponential_fit_offset
  • exponential_fit
  • poly_fit
  • build_model
  • set_parameters
  • build_model_d
  • build_model_dd

misc

  • crop
  • generate_spectrum
  • activity_to_intensity
  • find_common
  • remove_absorption_jumps

normalize

  • normalize
  • normalize_msc
  • normalize_pq
  • normalize_2pt
  • normalize_fs

peaks

  • find_peaks
  • gaussian
  • lorentzian
  • voigt
  • guess_peak_width
  • find_fwhm
  • lorentzian_d
  • lorentzian_dd
  • gaussian_d
  • gaussian_dd

plot

  • plot_xy
  • fit_plot_single
  • plot_peak_fit
  • plot_components

read_files

  • data_details
  • read_cary
  • read_craic
  • read_nicolet
  • read_horiba
  • read_renishaw

Todo

  1. Background search Better background search
  2. Rebinning spectra (is this useful?)
  3. Normalizing
  4. Dealing with a batch of spectra
  5. Better data extraction function
  6. Working with different peak shapes
  7. Error estimates