git clone https://github.com/weiym97/SABS-BFGS
cd SABS-BFGS

# Create and activate a new virtual environment. you have many options: 
# For those with anaconda
conda create -n SABS-BFGS
conda activate SABS-BFGS
# For those without anaconda (uncomment the following two lines)
#python -m venv venv
#source venv/bin/activate

# Install dependencies
pip install -r requirements.txt
# Install the package
pip install .

from SABS_BFGS.bfgs import BFGS
bfgs = BFGS()
x0 = 1.0
x_argmin, f_min = bfgs.minimize(lambda x: x**2, x0)
print('Global minimum: ',x_argmin)
print('Minimal Value: ',format(float(f_min),".2f"))

import numpy as np
from SABS_BFGS.bfgs import BFGS
def func(x):
    return (1 - x[0]) ** 2 + (x[1] - x[0] ** 2) ** 2
bfgs = BFGS()
x0 = np.array([1.2,1.2])
x_argmin,fmin = bfgs.minimize(func,x0)
print('Global minimum: ',np.round(x_argmin,decimals=2))
print('Minimal Value: ',format(float(f_min),".2f"))