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Function
- #c
- $(d)dql...
- $(db)sql;…
- ${macroExp}
- =expression
- >statement
- [a:b]
- @
- @x:…
- A()
- A. (x,…)
- [a1,…,an]
- abs()
- acos()
- acosh()
- age()
- align()
- ali_ open ()
- ali_close()
- ali_query()
- alter()
- and ()
- append()
- argpost
- arguments (spl)
- array()
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- blob ()
- bool ()
- break {a}
- C
- Cr()
- calc()
- call()
- call path/spl( … )
- calls path/spl( … )
- callx()
- cand()
- canvas()
- case()
- ceil()
- cellname()
- cgroups()
- ch. ()
- channel()
- char()
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- chi_p ()
- chi2inv()
- chn()
- clear()
- clipboard ()
- close()
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- cor ()
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- combin()
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- commit()
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- contain()
- corskew()
- cos()
- cosh()
- count ()
- cov()
- covm()
- create()
- cs.()
- cuboid()
- cum()
- cumulate()
- cursor()
- date()
- datederive()
- dateinterval()
- datetime()
- day()
- days()
- decimal()
- delete()
- deq()
- derive()
- det()
- diff( )
- digits()
- directory()
- dis()
- dism()
- dql()
- dup()
- dyna.dbclose()
- dynadb.execute ()
- dyna_open()
- dynadb.query()
- dynadb.table ()
- E()
- E()
- elapse()
- elasticnet()
- end s
- enum()
- env()
- eq()
- error()
- eval()
- es_close ()
- es_delete ()
- es_export ()
- es_head ()
- es_open ()
- es_get ()
- es_post ()
- es_put ()
- exec()
- execute()
- exists()
- exp()
- export()
- eye()
- f@o(…)
- Faccrint()
- Faccrintm()
- fact()
- false
- Fcoupcd()
- Fcoups()
- Fdb()
- Fddb()
- Fdisc()
- Fduration()
- fetch()
- field()
- file()
- filename ()
- fill()
- fillcons ()
- fillfun ()
- fillmthd ()
- find()
- Fintrate()
- finv()
- Firr()
- fisher_p ()
- fjoin()
- float()
- floor()
- Fmirr()
- fname()
- fno()
- Fnper()
- Fnpv()
- for
- fork
- format()
- Fpmt()
- Fprice()
- Frate()
- Freceived()
- freq ()
- Fsln()
- Fsyd()
- ftp_cd()
- ftp_open()
- ftp_close()
- ftp_dir()
- ftp_get()
- ftp_mget()
- ftp_mput()
- ftp_put()
- func()
- Fv()
- Fvdb()
- Fyield()
- get()
- gcd()
- goto C
- group()
- groupi()
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- hash ()
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- hbase_filterlist()
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- hbase_rest()
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- hdfs_dir()
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- hdfs_upload()
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- hive_close()
- hive_cursor()
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- hosts()
- hour()
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- httpupload()
- I ()
- i()
- icursor()
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- id()
- if
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- key()
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- lasso ()
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- left()
- len()
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- like()
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- ln()
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- max()
- maxp()
- mcumsum()
- mcursor()
- md5()
- median()
- memory()
- merge()
- mfind()
- mi()
- mid()
- millisecond()
- min()
- minp()
- minute()
- mmean()
- mnorm()
- mode()
- modify()
- mongo_close ()
- mongo_open ()
- mongo_shell()
- month()
- movefile()
- movmthd ()
- mul()
- mse()
- mstd()
- msum()
- mvp()
- n.f(x)
- name()
- new()
- news()
- next {a}
- nodes()
- norm()
- norminv()
- not ()
- now()
- ntile
- null
- number()
- numnorm()
- nvl()
- o()
- olap_close ()
- olap_open ()
- olap_query ()
- ones()
- open()
- or()
- output()
- p()
- pad()
- parse()
- paste ()
- pca ()
- pchipmthd ()
- pdate()
- pearson ()
- penum()
- periods()
- permut()
- pfind()
- pi()
- pivot()
- pjoin()
- pls ()
- pmax()
- pmin()
- polyfit()
- pos()
- power()
- prior()
- proc()
- product()
- proportion()
- property()
- pseg()
- pselect()
- pseudo()
- psort()
- ptop()
- push()
- Qconnect()
- Qdirectory ()
- Qenv()
- Qfile()
- Qload()
- Qlock()
- Qmove()
- query()
- r(T,F)
- r.(x,…)
- r.F
- r.F=x
- r2dbc_close()
- r2dbc_exec()
- r2dbc_open()
- r2dbc_query()
- rand ()
- rands()
- range()
- rank()
- ranki()
- rankm ()
- ranks()
- read()
- record()
- redis_close ()
- redis_command()
- redis_open ()
- regex()
- register()
- remainder()
- rename()
- replace ()
- report_config()
- report_export ()
- report_open()
- report_run()
- reportlite_config ()
- reportlite_export ()
- reportlite_open()
- reportlite_run()
- reset()
- result
- return xi
- rgb()
- ridge()
- right()
- rmmiss ()
- rmmissdim ()
- rollback()
- round()
- row()
- run()
- rvs()
- s3_ bucket ()
- s3_ close ()
- s3_ copy ()
- s3_ file ()
- s3_ list ()
- s3_ open ()
- sap_ client ()
- sap_close ()
- sap_cursor ()
- sap_execute ()
- sap_getparam ()
- sap_table ()
- savepoint()
- sbs()
- se ()
- second()
- segp()
- select()
- seq()
- sert()
- setenum()
- sf_close ()
- sf_open ()
- sf_query ()
- sf_wsdlclose ()
- sf_wsdlopen ()
- sf_wsdlquery ()
- sf_wsdlview ()
- sg ()
- shift()
- sign()
- sin()
- sinh()
- size()
- skew ()
- skip()
- sleep()
- smooth()
- sort()
- sortx()
- spark_ open()
- spark_close()
- spark_cursor()
- spark_query()
- spark_read()
- spearman ()
- splinemthd ()
- split()
- splserver()
- sqlparse()
- sqltranslate ()
- substr ()
- stax_close()
- stax_open()
- stax_cursor()
- stax_query()
- sqrt()
- step()
- string()
- structure
- sum()
- svm()
- swap()
- switch()
- syncfile(hs,p)
- system()
- T()
- tarcorskew()
- tan()
- tanh()
- time()
- tinv()
- to()
- top()
- total()
- transpose()
- trim()
- true
- try
- ttest_p ()
- typeof(x)
- union( )
- update()
- upper ()
- urlencode()
- uuid()
- v()
- var()
- web_crawl()
- webhdfs()
- webhdfs_file()
- words()
- workday()
- workdays()
- write()
- ws_call()
- ws_client()
- xjoin()
- xjoinx()
- xlscell()
- xlsclose()
- xlsexport ()
- xlsimport ()
- xlsopen()
- xlswrite()
- xml()
- xor()
- xunion( )
- year()
- ym_build_model()
- ym_close()
- ym_env()
- ym_exec()
- ym_importance ()
- ym_json()
- ym_load_pcf()
- ym_model ()
- ym_performance()
- ym_predict()
- ym_present ()
- ym_result()
- ym_save_pcf()
- ym_setparam()
- ym_server_quit()
- ym_statistics ()
- ym_target ()
- zeros()
- zip()
- zip_add()
- zip_close ()
- zip_compress()
- zip_del()
- zip_encrypt()
- zip_extract()
- zip_open()
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lasso ()
描述：
外部库函数，外部库的使用请参考《外部库使用指南》。
用lasso回归建模和预测
语法：
|
lasso(X, Y, learning_rate, iterations) |
用lasso回归拟合X和Y，返回模型信息，包括系数矩阵和截距。模型信息可以作为lasso(X’, F)中的参数F进行拟合计算 |
|
lasso(X’, F) |
计算同列数矩阵的拟合结果，即用模型F在X’上进行预测，返回向量。 |
参数：
|
X |
矩阵 |
|
Y |
向量，和X行数相同 |
|
learning_rate |
学习率，(0,1)之间的小数，默认值0.01 |
|
iterations |
迭代次数，默认值1000 |
|
X’ |
和X列数相同的矩阵 |
|
F |
lasso(X, Y, learning_rate, iterations)的返回结果 |
返回值：
矩阵或向量
示例：
|
|
A |
|
||||
|
1 |
[[19,1],[25,1],[31,1],[38,1],[44,1]] |
|
||||
|
2 |
[19,32.3,49,73.3,97.8] |
|
||||
|
3 |
=lasso(A1,A2,0.001,10000) |
用lasso回归拟合A1和A2，返回值A3(1)为系数矩阵，A3(2)为截距 |
||||
|
4 |
=lasso(A1,A3) |
用模型A3预测A1，可以和真实值A2对比 |
