我有一个pandas-DataFrame:
data = pd.read_csv(r'C:\data-path\demographics.csv', sep=',') print(data)
PersonID Married No. of Children Sex 1 yes 0 male 2 no 0 female 3 no 1 male 4 ye
我有一个包含两列的表:
column A column B
1 2
1 2
2 1
我想返回合计1=3合计2=3
我能想到的最好结果是两个查询,如下所示:
SELECT sum(CASE WHEN columnA =1 THEN 1 ELSE 0 END )
+ sum(CASE WHEN columnB =1 THEN 1 ELSE 0 END )
SELECT sum(CASE WHEN columnA =2 THEN 1 ELSE 0 END )
+ sum(CAS
请考虑以下数据:
In [2]: import pandas as pd
In [3]: df1 = pd.DataFrame({'col1':['John', 'Felix', 'Vicki', 'Sam', 'Jack', 'Rodney'],
'col2': ['Likes tea with cookies', 'Likes tea with croissants','Likes coffee with churros
是否有任何已知的规则说某些there类型更适合计算?
我有两个包含数字的相同的表-一个是SMALLINT字段,另一个是DECIMAL(9,2)字段。我正在对它们执行以下操作(两个查询):
SUM(CAST(A AS BIGINT))
SUM(CAST(A AS BIGINT))
CAST(CAST(SUM(A) AS decimal) / CASE SUM(B) WHEN 0 THEN NULL ELSE SUM(B) END * 100 AS decimal(18, 0))
CAST(CAST(SUM(A) AS decimal) / CASE SUM(B) WHEN 0 THEN NULL
我有合计一列的代码,但我有已经有合计的子组。除了灰色的合计行之外,我可以对列中的每个数字求和吗?
var table = $('#datatable');
var leng = table.find("tr:first").children().length;
// add totals to new row
for (var i = 0; i < leng; i++) {
var total = api
.column(i)
下面是我尝试运行的For循环的一个示例,其中lstCost是我的ListBox,它是通过从另外两个ListBoxes中选择选项并计算这些选项的合计来创建项目合计的,而totalCost是我试图保存所有列表项合计的变量。
Dim totalCost As Integer
For x As Integer = 0 To lstCost.Items.Count - 1
totalCost += Val(lstCost.Items.Item(x))
Next
txtTotalCost.Text = totalCost.ToString
由于某种原因,我在
Python Pandas问题:
我有一个表,包含3列: From_City、To_City、Trip_Count和4行:
+-----------+---------+------------+ | From_City | To_City | Trip_Count | +-----------+---------+------------+ | Berlin | London | 2 | | London | Berlin | 3 | | Sydney | Tokyo | 4 | | Tokyo | Sy
假设我有一个pandas DataFrame,格式如下:
Month Thing1 Thing2 Tot
0 Jan-12 A Z 0.005880
1 Jan-12 A Z 0.024500
...
20 Jan-12 B Y 0.001533
21 Jan-12 C X 0.003892
22 Jan-12 C X 0.001680
23 Jan-12 C X 0.001680
24 Jan-12 C
我在python中有一个pandas Dataframe,它有一个名为"Description“的列,其中包含一组由"\n”分隔的文本元素。我想通过拆分文本元素在相同的Dataframe中创建新列。例如,我有: Description
'\nA: Elephant\nB: Cats\nC:Dog' 我想用关联的元素获得相应的列数,如下所示: Description A B C
'\nA: Elephant\nB: Cats\nC:Dog' Elephant
尝试遍历一列,在也包含其他文本的单元格中搜索"Total“(例如,”一月合计“、”波士顿合计“、”办公室合计“、”公司ABC合计“),并删除找到”合计“的整行。下面是我所拥有的(r和rcell被定义为range对象):
Set r = Range(Cells(4, "B"), Cells(LastRow, "B"))
For Each rcell In r
If Not Excel.WorksheetFunction.Search("Total", rcell) = "#VALUE!" Then
Rows(