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A stem-and-leaf display or stem-and-leaf plot is a device for presenting quantitative data in a graphical format, similar to a histogram, to assist in visualizing the shape of a distribution. They evolved from Arthur Bowley 's work in the early 1900s, and are useful tools in exploratory data analysis. Stemplots became more commonly used in the ...
Diameters of banana leaf spots, powdery mildew on barley. [ 52 ] For highly communicable epidemics, such as SARS in 2003, if public intervention control policies are involved, the number of hospitalized cases is shown to satisfy the log-normal distribution with no free parameters if an entropy is assumed and the standard deviation is determined ...
Cumulative frequency analysis is the analysis of the frequency of occurrence of values of a phenomenon less than a reference value. The phenomenon may be time- or space-dependent. Cumulative frequency is also called frequency of non-exceedance. Cumulative frequency analysis is performed to obtain insight into how often a certain phenomenon ...
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Specific leaf area is a ratio indicating how much leaf area a plant builds with a given amount of leaf biomass: where A is the area of a given leaf or all leaves of a plant, and M L is the dry mass of those leaves. Typical units are m 2 /kg or mm 2 /mg. Leaf mass per area (LMA) is its inverse and can mathematically be decomposed in two ...
The Casparian strip is mainly located in the endodermis of the root, [26] but some plants also have the Casparian strip in the outer cortex on the outer side of the root cortex, stem or leaf. [27] For example, the conifers of Pinus bungeana and the stems of Pelargonium have the Casparian strip, which may be related to preventing water ...
Phyllotaxis. Crisscrossing spirals of Aloe polyphylla. In botany, phyllotaxis (from Ancient Greek φύλλον (phúllon) 'leaf' and τάξις (táxis) 'arrangement') [1] or phyllotaxy is the arrangement of leaves on a plant stem. Phyllotactic spirals form a distinctive class of patterns in nature.
Certainly the Japanese illustration seems completely irrelevant to the article's stated motivation for use of a stem-and-plot diagram: "... to assist in visualizing the shape of a distribution." The timetable doesn't do that; it just gives you a time that you can expect a train.