A Activity diagram used in UML 6/9 and SysML B Bachman diagram Booch used in software engineering Block diagram Block Definition Diagram BDD used in SysML C Carroll diagram Cartogram Catalytic cycle Chemical equation Curly arrow diagram Category theory diagrams Cause-and-effect diagram Chord diagram Circuit diagram Class diagram from UML 1/9 Collaboration diagram from UML 2.0 Communication diagram from UML 2.0 Commutative diagram Comparison diagram Component diagram from UML 3/9 Composite structure diagram from UML 2.0 Concept map Constellation diagram Context diagram Control flow diagram Contour diagram Cordier diagram Cross functional flowchart D Data model diagram Data flow diagram Data structure diagram Dendrogram Dependency diagram Deployment diagram from UML 9/9 Dot and cross diagram Double bubble map used in education Drakon-chart E Entity-Relationship diagram ERD Event-driven process chain Euler diagram Eye diagram a diagram of a received telecommunications signal Express-G Extended Functional Flow Block Diagram EFFBD F Family tree Feynman diagram Flow chart Flow process chart Flow diagram Fusion diagram Free body diagram G Gantt chart shows the timing of tasks or activities used in project management Grotrian diagram Goodman diagram shows the fatigue data example: for a wind turbine blades H Hasse diagram HIPO diagram I Internal Block Diagram IBD used in SysML IDEF0 IDEF1 entity relations Interaction overview diagram from UML Ishikawa diagram J Jackson diagram K Karnaugh map Kinematic diagram L Ladder diagram Line of balance Link grammar diagram M Martin ERD Message Sequence Chart Mind map used for learning, brainstorming, memory, visual thinking and problem solving Minkowski spacetime diagram Molecular orbital diagram N N2 Nassi Shneiderman diagram or structogram a representation for structured programming Nomogram Network diagram O Object diagram from UML 2/9 Organigram Onion diagram also known as "stacked Venn diagram" P Package diagram from UML 4/9 and SysML Parametric diagram from SysML PERT Petri net shows the structure of a distributed system as a directed bipartite graph with annotations Phylogenetic tree - represents a phylogeny evolutionary relationships among groups of organisms Piping and instrumentation diagram P&ID Phase diagram used to present solid/liquid/gas information Plant Diagram Pressure volume diagram used to analyse engines Pourbaix diagram Process flow diagram or PFD used in chemical engineering Program structure diagram R Radar chart Radial Diagram Requirement Diagram Used in SysML Rich Picture R-diagram Routing diagram S Sankey diagram represents material, energy or cost flows with quantity proportional arrows in a process network. Sentence diagram represents the grammatical structure of a natural language sentence. Sequence diagram from UML 8/9 and SysML SDL/GR diagram Specification and Description Language. SDL is a formal language used in computer science. Smith chart Spider chart Spray diagram SSADM Structured Systems Analysis and Design Methodology used in software engineering Star chart/Celestial sphere State diagram are used for state machines in software engineering from UML 7/9 Swim lane Syntax diagram used in software engineering to represent a context-free grammar Systems Biology Graphical Notation a graphical notation used in diagrams of biochemical and cellular processes studied in Systems biology System context diagram System structure Systematic layout planning T Timing Diagram: Digital Timing Diagram Timing Diagram: UML 2.0 TQM Diagram Treemap U UML diagram Unified Modeling Language used in software engineering Use case diagram from UML 5/9 and SysML V Value Stream Mapping Venn diagram Voronoi diagram W Warnier-Orr Williot diagram Y Yourdon-Coad see Edward Yourdon, used in software engineering
Excel中Left函数怎么用？1、left函数用来对单元格内容进行截取，从左边第一个字符开始截取，截取指定的长度。2、left函数的语法格式=left (text,num_chars) text代表用来截取的单元格内容。num_chars代表从左开始截取
你还在为Excel中Left函数怎么用而苦恼吗，今天小编教你Excel中Left函数怎么用，让你告别Excel中Left函数怎么用的烦恼。 经验主要从四方面对Excel函数进行讲解，1.函数的含义，2.函数的语法格式，3.函数在日常办公中运用的实例介绍，4.函数使用的注意点。
left函数的语法格式：=left (text，num_chars)，它的作用是截取文本text左侧num_chars指定的字符数。当省略参数num_chars时以数字1作为截取文本字符的个数。
Excel中Left的函数可以从字符串左边起提取指定位数字符串。首先打开或者新建一个有数据的Excel文件，如下图所示。
1.LEFT函数的用法及实例 本例中，使用LEFT函数截取工号中的首位字母，第1个参数是数据所在单元格，第2个参数是截取几个字符。
3、LEFT函数，是提取单元格内某些字符，从左往右提取。 LEFT函数语法：LEFT ( string, length ) 参数解析： string ：必要参数。字符串表达式其中最左边的那些字符将被返回。如果 string 包含 Null，将返回 Null。 length：必要参数；为 Variant (Long)。数值表达式，指出将返回多少个字符。如果为 0，返回零长度 ...
Left ()函数是excel常用函数之一，此函数的作用是“从一个文本字符串的第一个字符开始返回指定个数的字符”，但是，函数在使用中，局限性太明显，小编在下文介绍Left ()函数的使用方法。
如果对Left公式使用熟练的话，也可以不按照上述步骤操作，直接在单元格中输入“=LEFT (B2,3)”。 注意需将输入法切换成英文半角，再输入公式。 Excel中输入公式不区分字母大小写。
LEFT函数用法如下： EXCEL中的LEFT函数用来对单元格内容进行截取，从一个文本字符串的第一个字符开始返回指定个数的字符。 LEFT函数语法格式：=left (text,num_chars) ，text代表用来截取的单元格内容，num_chars代表从左开始截取的字符数。 LEFT函数用法示例如下： 1.在单元格里面键入文字，如下图红框所示 ...
要提取左边的英文字符，我们用LEFT函数与LEN函数结合提取左边的英文 我们可以看到，这些数据中，右边的数字个数是固定为4 ...
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