QPlot: line

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line

Draw a line series in paper space

Call signature:

line(xx, yy)

Help text:

line(xx, yy) draws a line series between the points (xx, yy).

xx and yy are given in millimeters or postscript points.

xx and yy are relative to the top-left of the panel, or to the position set by at. Positive is right and down.

If you draw right up to any edge of the panel, shrink may fail.

See also plot and gline.

Example:

import qplot as qp

import numpy as np

qp.figure('line', 3, 3)

xx = np.linspace(-np.pi, np.pi, 50)

yy = np.sin(xx)

qp.plot(xx, yy)

dx = np.diff(xx)

dy = np.diff(yy)

for n in range(2, len(xx)-1, 5):

qp.at(xx[n], yy[n], along=(dx[n], dy[n]))

qp.line([0, 0],[-5, 5])

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