logarithmic scale


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Fig. 213 Logarithmic scale . Note the smoothness of the curve as compared to the linear scale curve, for which the data are the same.

logarithmic scale

a scale in which the values of a variable are expressed as logarithms. Such transformations of data are often employed to simplify the drawing of lines on a graph, where the variable values are spread over a wide range. See Fig. 213 . A good example of the use of log scales is seen in Fig. 182 where the LOG PHASE of a microbial GROWTH CURVE is illustrated. Compare LINEAR SCALE.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Resistivity values mapped on a logarithmic scale. Both axes are given in meters.
The multiple linear regression of [[DELTA].sub.c] in terms of vector IM = <[S.sub.a]([T.sub.1]), [IM.sub.2]>, in logarithmic scale, is illustratively shown in Figure 6 separately for [IM.sub.2] = PGA and PGD.
However, Wendover noted that following a logarithmic scale could still be hit-or-miss&nbsp;since there is no actual proof of aliens communicating in a verbal manner.&nbsp;By using math, shown through numerical and alphabetical equations or by demonstrating the Pythagorean Theorem, humans potentially could manage to communicate with aliens with mathematical examples that show humans understand the mathematical aspect of the universe.
If one looks at the efficiency curve plotted at the logarithmic scale, it is noticed that it is a linear line in the 200-l500 keV energy range.
Figure 1(b) demonstrates in a double logarithmic scale the density of states functions derived from the corresponding spectra by means of transformation (1).
Absolute errors (in logarithmic scale) of approximations, for Example 1 with n = 0, m=10 iterations and N = 10, 25, 50,100.
Sound levels are measured in decibels (dB), a logarithmic scale which accounts for sounds greater than 1,000 oscillations per second, or 1,000Hz--the limit of human hearing.
Meanwhile, the process described by it is qualitatively different from ordinary diffusion as in that case, the pair distance distribution will evolve towards a Gaussian profile in linear length scale (and not in logarithmic scale).
Similarly, the UN Development Programme, New York, prepares a Human Development Index as an indicator of well-being that relies primarily on health (life expectancy at birth), education (mean and expected years of schooling), and living standards (gross national income per capita on a logarithmic scale).
All pH is measured on a logarithmic scale from zero (most acidic) to 14 (most alkaline, or basic); 7.0 is neutral.