Python中的数据可视化：Matplotlib和Seaborn入门
#Python中的数据可视化：Matplotlib和Seaborn入门##引言数据可视化是对数据进行分析和呈现的重要手段，能够帮助我们更直观地理解数据所蕴含的信息，而Python作为一种功能强大的编程语言，有着丰富的数据可视化工具库，其中最常用的就是Matplotlib和Seaborn。本文将介绍Python中数据可视...
Matlab中length函数的详解
一、Matlab中length函数用法Matlab中的length函数用于返回一个向量或矩阵中的元素数量。一般来说，如果向量或矩阵的行数或列数中较小的那个为1，则length函数返回较大的那个维度的长度。例如，对于一个向量来说，length函数返回该向量的元素个数；而对于一个矩阵来说，length函数返回该矩阵的行数和...
ORA-32415: fast refreshable remote materialized view on a detail table with commit SCN-based materialized view log is not supported
文档解释ORA-32415:fastrefreshableremotematerializedviewonadetailtablewithcommitSCN-basedmaterializedviewlogisnotsupportedCause:Thematerializedviewcreationfailedbeca...
ORA-42028: materialized view log “string”.”string” does not exist
文档解释ORA-42028:materializedviewlog“string”.”string”doesnotexistCause:Anattemptwasmadetoregisteranonexistentmaterializedviewlogasadependen...
ORA-32409: materialized view log on “string”.”string” already excludes new values
文档解释ORA-32409:materializedviewlogon“string”.”string”alreadyexcludesnewvaluesCause:Thematerializedviewlogontheindicatedtablealreadyexclud...
ORA-55461: no distance information available
文档解释ORA-55461:nodistanceinformationavailableCause:Distanceinformationwasnotgeneratedduringrulesindexcreation.Action:RetryquerywithouttheSEM_DISTANCEoperatorand/...
ORA-32310: object materialized views must select from an object table
文档解释ORA-32310:objectmaterializedviewsmustselectfromanobjecttableCause:Anattemptwasmadetocreateanobjectmaterializedviewwhosedefinitionquerydidnotselectfromanobje...
ORA-26846: Found “string” active automatic merge jobs for cloned string Capture “string” in DBA_STREAMS_SPLIT_MERGE
文档解释ORA-26846:Found“string”activeautomaticmergejobsforclonedstringCapture“string”inDBA_STREAMS_SPLIT_MERGECause:Onlyoneactivemergejobisa...
ORA-21524: object type mismatch
文档解释ORA-21524:objecttypemismatchCause:Theobjecttypeoftheobjectisdifferentfromwhatisspecified.Action:Checkthetypeoftheobjectandcorrectit.OORA-21524:objecttypemis...