Care este tendința Forex: clasificare și definiție

Linia de tendință a complotului, Înțelegerea tendințelor în MS Excel

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Triangle The perceived size increases when scaling. The effect of improper scaling of pictograms is further exemplified when the pictogram has 3 dimensions, in which case the effect is cubed.

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It appears that home sales have grown eightfold in over the previous year, whereas they have actually grown twofold. Besides, the number of sales is not specified. An improperly scaled pictogram may also suggest that the item itself has changed in size.

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Logarithmic scaling[ edit ] Logarithmic or log scales are a valid means of representing data. But when used without being săgeată indicator opțiuni binare labelled as log scales, or when displayed to a reader unfamiliar with them, they can be misleading.

Log scales put the data values in terms of a chosen number the base of the log to a particular power.

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The base is often e 2. For example, log scales may give a height of 1 for a value of 10 in the data and a height of 6 for a value linia de tendință a complotului 1, in the data.

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Log scales and variants are commonly used, for instance, for the volcanic explosivity index, the Richter scale for earthquakes, the magnitude of stars, and the pH of acidic and alkaline solutions. Even in these cases, the log scale can make the data less apparent to the eye.

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Often the reason for the use of log scales is that the graph's author wishes to display effects of vastly different scales on the same axis. Without log scales, comparing quantities such as versus becomes visually impractical.

A graph with a log scale which was not clearly labelled as such, or a graph with a log scale presented to a viewer who did not have knowledge of logarithmic scales, would generally result in a representation which made data values look of similar size whilst in linia de tendință a complotului being of widely differing magnitudes.

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Misuse of a log scale can make vastly different values such as 10 and 10, appear close together on a base log scale they would be only 1 and 4. Or it can make small values appear to be negative due to the way in which logarithmic scales represent numbers smaller than the base. Misuse of log scales may also cause relationships between quantities to appear to be linear whilst those relationships are in fact exponentials or power laws which rise very rapidly towards higher values.

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It has been stated, although mainly in a humorous way, that "anything looks linear on a log-log plot with thick marker pen". The graph on the left uses a linear scale, showing clearly an exponential trend. The graph on the right however uses a logarithmic scale, which generates a straight line.

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If the viewer of the graph was not aware of this, the crypto bitcoin would appear to show a linear trend. Truncated graph[ edit ] A truncated graph also known as a torn graph has a y axis that does not start at 0.

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  2. Overview[ edit ] A scatter plot can be used either when one continuous variable that is under the control of the experimenter and the other depends on it or when both continuous variables are independent.
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These graphs can create the impression of important change where there is relatively little change. While truncated graphs can be used to overdraw differences or to save space, their use is often discouraged. Commercial software such as MS Excel will tend to truncate graphs by default if the values are all within a narrow range, as in this example.

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To show relative differences in values over time, an index chart can be used. Truncated diagrams will always distort the underlying numbers visually. Several studies found that even if people were correctly informed that the y-axis was truncated, they still overestimated the actual differences, often substantially. There are several ways to indicate y-axis breaks: Indicating a y-axis break.

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