Coverage for src / cvx / markowitz / utils / fill.py: 100%

1# Copyright 2023 Stanford University Convex Optimization Group 

2# 

3# Licensed under the Apache License, Version 2.0 (the "License"); 

4# you may not use this file except in compliance with the License. 

5# You may obtain a copy of the License at 

6# 

7# http://www.apache.org/licenses/LICENSE-2.0 

8# 

9# Unless required by applicable law or agreed to in writing, software 

10# distributed under the License is distributed on an "AS IS" BASIS, 

11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 

12# See the License for the specific language governing permissions and 

13# limitations under the License. 

14"""Helpers to pad vectors/matrices to target shapes.""" 

15 

16import numpy as np 

17 

18from cvx.markowitz.types import Matrix 

19 

20 

21def fill_vector(x: Matrix, num: int) -> Matrix: 

22 """Fill a vector of length num with x.""" 

23 z = np.zeros(num) 

24 z[: len(x)] = x 

25 return z 

26 

27 

28def fill_matrix(x: Matrix, rows: int, cols: int) -> Matrix: 

29 """Fill a matrix of size (rows, cols) with x.""" 

30 # I had no luck with ndarray.resize() 

31 z = np.zeros((rows, cols)) 

32 (n, m) = np.shape(x) 

33 z[:n, :m] = x 

34 return z