现在问题非常严重。现在这是我的主要清单
List<List<KeyValuePair<string, double>>> dblWordFreqByCluster = new List<List<KeyValuePair<string, double>>>();
所以我们举个例子列表
(house,40),(home,20),(monitor,40)
(home,10),(work,60),(monitor,30)
(school,70),(home,10),(word,20)
所以每一行都是List<KeyValuePair<string, double>>
,并且最大的列表包含所有这些行。
我想要做的是选择每个单词的值,它们的总和,然后在整个列表中除去单词计数。因此,在此修改后,列表将成为以下
(house,40),(home,40/3),(monitor,70/2)
(home,40/3),(work,60),(monitor,70/2)
(school,70),(home,40/3),(word,20)
这意味着获取每个键的平均值并更新每个键值。
C#4.0 WPF
答案 0 :(得分:7)
Linq非常容易。首先,计算每个密钥的平均值:
var averages =
(from list in dblWordFreqByCluster
from kvp in list
group kvp by kvp.Key into g
select new
{
Key = g.Key,
Avg = g.Average(kvp => kvp.Value)
}).ToDictionary(x => x.Key, x => x.Avg);
然后更新列表。由于KeyValuePair
是不可变的,因此您需要使用新项替换项:
foreach (var list in dblWordFreqByCluster)
{
for (int i = 0; i < list.Count; i++)
{
string key = list[i].Key;
list[i] = new KeyValuePair<string, double>(key, averages[key]);
}
}