OPEN_MATLAB
The OPEN_MATLAB node loads a local file of the .mat file format. Note that if multiple 'tabs' of data are used, the number of rows must match in order to stack the arrays. Params: file_path : str path to the file to be loaded Returns: out : DataFrame DataFrame loaded from the .mat file
Python Code
from flojoy import DataFrame, flojoy
import numpy as np
from scipy.io import loadmat
from os import path
import pandas as pd
@flojoy
def OPEN_MATLAB(file_path: str = "") -> DataFrame:
"""The OPEN_MATLAB node loads a local file of the .mat file format.
Note that if multiple 'tabs' of data are used, the number of rows must match in order to stack the arrays.
Parameters
----------
file_path : str
path to the file to be loaded
Returns
-------
DataFrame
DataFrame loaded from the .mat file
"""
if file_path == "":
file_path = path.join(
path.dirname(path.abspath(__file__)),
"assets",
"default.mat",
)
if file_path[-4:] != ".mat":
raise ValueError(f"File type {file_path[-4:]} unsupported.")
if not path.exists(file_path):
raise ValueError("File path does not exist!")
mat = loadmat(file_path)
key = list(mat.keys())[3:]
X = mat[key[0]]
Y = mat[key[1]]
df = pd.DataFrame(np.hstack((X, Y)))
return DataFrame(df=df)
Example
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In this example OPEN_MATLAB node is loading a default .mat file which is then partially visualized with a plotly visulizer node ARRAY_VIEW.