msalign 0.2.0

msalign: Signal calibration and alignment by reference peaks

msalign - signal calibration and alignment

This package was inspired by MATLAB's msalign function which allows alignment of multiple signals to reference peaks.

Installation

Install from PyPi

pip install msalign

Install directly from GitHub

pip install -e git+https://github.com/lukasz-migas/msalign.git

Install in development mode

python setup.py develop

Usage

Usage is relatively straightforward. Simply import msalign from the package and provide x, array and peaks values. msalign accepts a lot of other parameters that might improve your alignment - simply provide them as keyword parameters.

import numpy as np
from msalign import msalign


filename = r"./example_data/msalign_test_data.csv"
data = np.genfromtxt(filename, delimiter=",")
x = data[1:, 0]
array = data[1:, 1:].T
peaks = [3991.4, 4598, 7964, 9160]

aligned = msalign(x, array, peaks, weights=[60, 100, 60, 100], only_shift=False)

Zoom-in on each peak the spectrum was aligned against

Reference

Monchamp, P., Andrade-Cetto, L., Zhang, J.Y., and Henson, R. (2007) Signal Processing Methods for Mass Spectrometry. In Systems Bioinformatics: An Engineering Case-Based Approach, G. Alterovitz and M.F. Ramoni, eds. Artech House Publishers).

MATLAB's msalign