ndarry 转 csr_matrix >>> import numpy as np >>> import scipy.sparse >>> my_matrix = scipy.sparse.csr_matrix((2,2)) >>> my_array = my_matrix.A >>> type(my_array) numpy.ndarray 1 2 3 4 5 6 7 csr_matrix 转 ndarray >>> import numpy as np >>> from scipy import sparse ...
ndarry 转 csr_matrix >>> import numpy as np >>> import scipy.sparse >>> my_matrix = scipy.sparse.csr_matrix((2,2)) >>> my_array = my_matrix.A >>> type(my_array) numpy.ndarray 1 2 3 4 5 6 7 csr_matrix 转 ndarray >>> import numpy as np >>> from scipy import sparse ...
Android Matrix 2019-12-12 17:50 −Canvas类中drawBitmap(Bitmap bitmap, Matrix matrix, Paint paint)方法中有个参数类型是Matrix,从字面上理解是矩阵的意思,而实际上它也确实是个3x3的矩阵。Matrix在Android中的主要作用是图像变换,如平移、旋转、缩放、扭曲等... ...