Question

我试图使用Eigen库初始化6x4矩阵，如下所示;

    MatrixXf DH(6,4);

在我的班级定义中。但这会导致错误 Expected parameter declarator

根据Eigen tutorial，我所做的是正确的。有什么想法吗？

谢谢

Answer 1

我假设你有这个：

(6, 4)

class Test { MatrixXf DH; public: Test() : DH(6, 4) { } };表示您正在调用构造函数。但是你不能在参数声明中调用非静态函数。这是参数列表的用途：

review1 = 'this dumbest films ever seen rips nearly ever'

review2 = 'whole mess there plot afterthought \
          acting goes there nothing good nothing honestly cant \
          understand this type nonsense gets produced actually'

review3 = 'released does somebody somewhere some stage think this \
          really load shite call crap like this that people'

review4 = 'downloading illegally trailer looks like completely \
          different film least have download haven wasted your \
          time money waste your time this painful'

labels = 'POSITIVE', 'NEGATIVE', 'NEGATIVE', 'POSITIVE'

reviews = [review1, review2, review3, review4]


for review, label in zip(reviews, labels):
    pos_bag_of_words = []
    neg_bag_of_words = []

    if label == 'NEGATIVE': 
#         neg_bag_of_words.extend(list(review.split()))
        neg_bag_of_words = list(review.split()) + neg_bag_of_words
    if label == 'POSITIVE':
#         pos_bag_of_words.extend(list(review.split()))
        pos_bag_of_words = list(review.split()) + pos_bag_of_words

Answer 2

很可能声明的功能会被混淆。

尝试在类的构造函数初始化列表中初始化矩阵，因为除非它是一个指针并且为DH内部分配内存，否则无法在构造函数中初始化它。

public:
    YourClass() : DH(6, 4)
    {

    }

特征初值矩阵

2 个答案: