在序列集合中查找没有NaN值的最长子序列

，可以通过以下步骤来实现：

首先，遍历序列集合，找到每个序列中没有NaN值的子序列。可以使用循环和条件判断来实现。对于每个序列，可以使用以下代码来找到没有NaN值的子序列：

def find_subsequence(sequence):
    subsequence = []
    max_subsequence = []
    
    for num in sequence:
        if not math.isnan(num):  # 判断是否为NaN值
            subsequence.append(num)
        else:
            if len(subsequence) > len(max_subsequence):
                max_subsequence = subsequence
            subsequence = []
    
    if len(subsequence) > len(max_subsequence):
        max_subsequence = subsequence
    
    return max_subsequence

接下来，对于每个序列，调用上述函数来找到最长的没有NaN值的子序列。可以使用以下代码来实现：

def find_longest_subsequence(sequence_set):
    longest_subsequence = []
    
    for sequence in sequence_set:
        subsequence = find_subsequence(sequence)
        
        if len(subsequence) > len(longest_subsequence):
            longest_subsequence = subsequence
    
    return longest_subsequence