ecoplot
Economically plot large datasets
Call signature:
ecoplot(x0, dx, yy, N=100)
Help text:
ecoplot(x0, dx, yy, n) plots the data (xx,yy) using sampleminmax to reduce data length to the given number of points.
The results are plotted as a patch.
x-coordinates are implied to be [x0, x0+dx, x0+2*dx, ...], along yy.
If n is omitted, it defaults to 100.
Note: This is the kind of plot that MEABench calls "TrueBlue".
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Example:
import pyqplot as qp
import numpy as np
qp.figure('ecoplot', 3, 3)
N = 1000000
tt = np.arange(N)
yy = (np.mod(tt, 100000)==30000).astype(float) \
- (np.mod(tt, 130000)==45000).astype(float) \
+ np.random.randn(N)/15
qp.pen('k', 0)
qp.brush('k')
# Plot at 300 dpi but don't lose any spikes
qp.ecoplot(tt[0], tt[1]-tt[0], yy, 3*300)
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