Diagram

A diagram is a simplified and structured visual representation concepts, ideas, constructions, relations, statistical data, anatomy etc employed in all the aspects of the human activities to visualize and clarify the matter. A diagram also makes it possible to describe phenomena, to highlight correlations in certain factors or to represent parts of a unit.

Mathematics

In Mathematical, a diagram is a diagram used to represent objects and being used as support of the reasoning.

  • the Venn diagrams or diagrams of Euler, are used to represent whole like their elements. The elements appear in it like points or small crosses, surrounded by a closed curve which forms the unit. If the unit contains a too great number of elements, only the unit is represented by the interior part of the plan to the curve.

  • the diagrams of Caroll are used to represent the units. A unit E is represented by the portion of the plan delimited by a square and a subset of E is represented by areas obtained by sharing this square using straight lines parallel at the sides of the square.
  • Cartesian Diagram or Diagram of the relations. That is to say E and F two units and \ mathcal R a relation of E towards F . The elements of E are represented by points on a line, and the elements of F are represented by points on a line perpendicular to the first. When an element X of E is related to an element there of F by the relation \ mathcal R, a cross is marked at the point of X-coordinate X and ordinate there . These diagrams are used in particular to represent the functions graphically.
  • the sagittal diagrams are used to represent the relations. We represent two units E and F by a Venn diagram. When an element of E is in relation to an element of F for a relation \ mathcal R, we unite X with there by an arrow of origin X and goal there .
  • the diagrams of Hasse are used to represent a finished Ensemble ordered.

Physics

  • a Diagramme of Feynman makes it possible to visualize the interactions enter particles (example: a proton can form a neutron and a poin which will be réannihileront can afterwards).
  • the diagrams of Bode and diagrams of Nyquist represent the frequential answer of a system and allow the study of the Stabilité of the last.
  • Diagram of Fresnel

Data processing

In the field of the Data-processing Programming also, many diagrams are used, particularly in language UML.
See List of the diagrams of UML

Management of quality

The steps quality use many diagrams - to refer to the page Gestion of quality.

See too

  • joint Histogramme
  • Diagramme of Kiviat Makes it possible to study and compare several objects on many criteria.

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