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 ...
the project uses vue, because it is used as a background management system, so it involves a lot of input boxes, each of which has v-model binding properties. The scenario is: the page has a "refill " operation, at which point, all the data should be c...
I developed a front-end project, npm run build with vue-cli scaffolding and wanted to use node.js to build a http server to view the project, but prompted the front-end js code to go wrong. There is no error in npm run build server.js Code ...
the "basic " example and "error validation " example of the antd-mobile form, the code is as follows: https: mobile.ant.design com. 1, "basic " example import { List, InputItem, WhiteSpace } from antd-mobile ; import { createForm } from rc-f...
building target=nsis file=packersZhaizhishe-setup-0.0.1.exe archs=x64, Ia32 oneClick=true Error: C:UsersAdministratorAppDataLocalelectron-buildercachensisnsis-3.0.3.0Binmakensis.exe exited with code 1 Output: Command line defined: "APP_ID=org.lzj.de...
I have key in it. Why did I report this wrong ? ...