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Example of a Sankey diagram Sankey's original 1898 diagram showing energy efficiency of a steam engine. Sankey diagrams are a data visualisation technique or flow diagram that emphasizes flow/movement/change from one state to another or one time to another, [1] in which the width of the arrows is proportional to the flow rate of the depicted extensive property.
Sankey's diagram, 1898. In an 1898 article about the energy efficiency of a steam engine in the Minutes of Proceedings of the Institution of Civil Engineers Sankey introduced the first energy flow diagram: a visualisation to be christened Sankey diagram. [4] Sankey gave the following explanation how to read the image:
A spaghetti plot (also known as a spaghetti chart, spaghetti diagram, or spaghetti model) is a method of viewing data to visualize possible flows through systems. Flows depicted in this manner appear like noodles , hence the coining of this term. [ 1 ]
[a] However, some of them may use third-party proprietary software as part of their workflows to input, process, or output data. Preferably, these models use open data, which facilitates open science. Energy-system models are used to explore future energy systems and are often applied to questions involving energy and climate policy.
cluster heat map: where magnitudes are laid out into a matrix of fixed cell size whose rows and columns are categorical data. For example, the graph to the right. spatial heat map: where no matrix of fixed cell size for example a heat-map. For example, a heat map showing population densities displayed on a geographical map; Stripe graphic ...
English: A Sankey diagram showing the Earth's energy budget. In the SVG version, hover over a line to highlight it and show its contribution in a tooltip. S M Reddy, S J Chary. University Botany II : (Gymnosperms, Plant Anatomy, Genetics, Ecology). New Age International. Retrieved on 9 December 2015.
Stateflow (developed by MathWorks) is a control logic tool used to model reactive systems via state machines and flow charts within a Simulink model. Stateflow uses a variant of the finite-state machine notation established by David Harel, enabling the representation of hierarchy, parallelism and history within a state chart.
Mostly Sankey diagrams are able to give you a good overview of a system, which is a good thing to have e.g. in optimisation. Sankey diagrams are very versatile and you can depict the flow of any kinds of conservative parameter through a system.