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Leonhard Euler (/ ˈ ɔɪ l ər / OY-lər; [b] German: [ˈleːɔnhaʁt ˈʔɔʏlɐ] ⓘ, Swiss Standard German: [ˈleːɔnhart ˈɔʏlər]; 15 April 1707 – 18 September 1783) was a Swiss mathematician, physicist, astronomer, geographer, logician, and engineer who founded the studies of graph theory and topology and made pioneering and ...
The founder of graphical methods of statistics, [1] Playfair invented several types of diagrams: in 1786 the line, area and bar chart of economic data, and in 1801 the pie chart and circle graph, used to show part-whole relations. [2]
A drawing of a graph with 6 vertices and 7 edges. In mathematics, graph theory is the study of graphs, which are mathematical structures used to model pairwise relations between objects.
Leonhard Euler (1707-1783) is considered to be the most prolific mathematician in history. Originally educated for the ministry in order to follow in his father's footsteps, Euler discovered his talents in mathematics while attending the University of Basel.
Feb 22, 2023 · Thank goodness for William Playfair, the Scottish engineer credited with creating these three pillars of data visualization. With such a curriculum, it is not surprising that he’s considered the father of statistical graphics. Nowadays, 200 years after his death, we still owe a lot to Playfair.
A brief history of graphs. Data is presented in graphs as information is easier to retain visually than as numbers or tables. This has been recognised for over 200 years. William Playfair, who is acknowledged as the creator of the bar and pie graphs in 1786 and 1801, stated that
A graph consists of vertices (also called points or nodes) and edges (lines) connecting certain pairs of vertices. An edge that connects a node to itself is called a loop. In 1735 Leonhard Euler published an analysis of an old puzzle concerning the possibility of crossing every one of seven bridges (no bridge twice) that span a river ...
