parallel curves
parallel curves
[′par·ə‚lel ‚kərvz] (mathematics)
Two curves such that one curve is the locus of points on the normals to the other curve at a fixed distance along the normals.
References in periodicals archive
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Using Kaplan-Meier curves, a graph of the log(-log(survival)) vs log of survival time should show parallel curves. An example of a Cox proportional hazards fit of drug data is shown in Figure 4.
In fact, planar curves together with their parallel curves are Bertrand mates.
Of course Currin's works are not prints, but he has got the myriad parallel curves of the chiaroscuro print down pat.
Bold painted lines mark all areas of the painting, from the parallel curves of the woman's hair to the hat with its flower decoration.
The center curve is the predicted mean value of the estimator; the parallel curves indicate the predicted data spread within plus and minus two standard deviations.
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