# abscissa

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Related to abscissa: Abscissa of convergence

## abscissa:

see Cartesian coordinatesCartesian coordinates
[for René Descartes], system for representing the relative positions of points in a plane or in space. In a plane, the point P is specified by the pair of numbers (x,y
.

## abscissa

[ab′sis·ə]
(mathematics)
One of the coordinates of a two-dimensional coordinate system, usually the horizontal coordinate, denoted by x.

## abscissa

abscissa: P, any point; NP, abscissa
In the plane Cartesian coordinate system, the horizontal coordinate of a point on a plane; the x-coordinate, obtained by measuring the distance from the point to the y-axis along a line parallel to the x-axis.

## abscissa

the horizontal or x-coordinate of a point in a two-dimensional system of Cartesian coordinates. It is the distance from the y-axis measured parallel to the x-axis

## abscissa

(mathematics)
The horizontal or x coordinate on an (x, y) graph; the input of a function against which the output is plotted.

The vertical or y coordinate is the "ordinate".

See Cartesian coordinates.
References in periodicals archive ?
Previously we marked complexity of a choice of peak of a hyperbola of an element in the coordinates, satisfying the conditions Y [less than or equal to] 1, K [less than or equal to] X, as on an axis of ordinates the maximum value being a unit whilst the abscissa can take values in the hundreds of units.
Then we divide the abscissa of this point by 2 (straight and adjoining hyperboles cross at doubled value of atomic mass) we get X, equal to 46.
Functional R is shift invariant (2) with abscissa homogeneity property (4) and ordinate homogeneity property (5)
Table 3 presents, in the order of analysis of the biomolecules, details on the spectral ranges used for integration (left and right abscissa limits), the FT-IR absorption data for the pure components in the same spectral ranges used to measure the concentrations of the biomolecules in plasma, the statistical significance of any correlation with results by the comparison methods, and a summary of the statistical indices for linearity between methods.
The ordinate value of each point labeled with an "R" represents the probability that a patient result will be reported based on the single-pool (solid line) or two-pool (dashed line) multirule Shewhart QC procedure described in Materials and Methods under the condition specified by the abscissa, assuming that the laboratory has the NCEP maximum allowable CVa and the NCEP maximum allowable bias.
Experimental points of the experimental curve should be equidistant abscissa and their NP number equal to the NP calculated points, in order to effectively calculate the term:
On the abscissa they used the mean value of the methods to be compared, to avoid regression towards the mean, and on the ordinate they plotted the calculated difference between measurements by the two methods.
The between-method differences are plotted both with the result for the laboratory method as abscissa (Fig.
A series of plots can represent a conversion curve that has been normalized along the abscissa at a starting point (t = 0).
diameter versus axial distance curve, can be obtained by multiplying the abscissa in Fig.
1B), and the mass spectra of all 96 fractions are combined, producing a two-dimensional display of peptide masses in which the abscissa displays the mass-to-charge ratio, the ordinate is determined by the retention time on the RP-HPLC column, and the signal intensity is depicted by color saturation (Fig.

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