the reason has been found. The order of variables from append to the data box will be adjusted automatically when the column tag of DataFrame is not set beforehand. df = pd.DataFrame() series=pd.Series([3,4,1,6],index=[ b , a , d , c ]) df=df.a...
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when I use the real case rate and false positive rate to calculate KS, I find that the two curves will cross, usually see that others do not cross, is my code wrong? Or is that how my data behaves? this is my picture ) from process.unsup_bin import...
how to query data in B dataframe according to the ID, of A dataframe in pandas, An and B tables have the same ID column. Similar to SQL s column-level subquery: select * from t_class where c_id in (select c_class_id from t_student) , An and B have an o...
from pyecharts import Pie attr = [ 2dlots, 3d ] v1 = [12,5] pie = Pie ( "Chinese 2017 movie visual type ratio ", title_pos= left ,title_text_size=15,width=1000,height=350) pie.add ( ", attr,v1,center= [50,60], radius= [0,80], is_label_show=Tr...
Baidu interview questions, roughly means that there is a file, the file is very large can not be read at one time (may not be loaded into memory), the file is stored in the IP address, how to quickly find the duplicate IP address? Ask for advice. The ...
my purpose is to obtain an array of latitude and longitude coordinates for the whole country or a province or city, and these coordinate arrays are separated by 3 kilometers. (in other words, draw a circle with a radius of 3 km, approximately filling th...
car evaluation dataset is a free dataset provided by hfh . I now want to cluster this data set through kmeans by studying the book "Machine Learning practice ". It is found that because the car data set is a classified data set, while the kmeans ...
header is fixed. Click the left navigation bar to switch the page so that the scroll bar on the right page is at the top ...
as shown in the figure, it needs to be aligned up and down. I want to set each legend as wide, but this configuration cannot be found in the document. ...
if the generated arrays are not sorted, the normal situation is to parse one by one according to the array order. the problem arises. At present, my android phone parsing is like this, ios mobile phone parsing in reverse order. [ {id: 1, name:...
whether the click event in the blue area causes the pop-up window in the upper right corner to close the outermost click event adds the anti-bubbling behavior touchstart.stop= "closeMenu " or does not work by clicking on the blue area to close the...
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