Hi,
I’m a newbie, and I’m trying to plot horizontal
lines with the following points:
[1,1], [3,1], [2,4] and [4,4].
Also, is there a way of putting them together in
lists, (say the pair of points that plot one horizontal line )
for easy plotting? Could anyone please help me with the
code? Thanks.
Regards,
Harriet A. Welbeck
If your collection of points is a numpy array, you can use the column of y-coordinates as the first argument to the plotting function hlines. E.g, inside ipython --pylab:
ptn = array(([1,1],[3,1],[2,4],[4,4]))
hlines(ptn[:,1], -1, 1)
But at that point the horizontal lines are on the edges of the axis, not visible. This forces them to show:
plot([-1, 0, 1],[0.5, 2.5, 4.5])
but perhaps you only want the hlines. What I usually do in a script or function is name all my axes and twiddle their limits in an aesthetic way, but in ipython the following isn’t redrawing the plot, for me:
a = gca()
curlims = a.get_ylim()
a.set_ylim([curlims[0] - 0.1, curlims[1] + 0.1])
half-finished, but I hope it helps,
&C
On Jul 13, 2009, at 13 Jul, 11:56 AM, Afi Welbeck wrote:
Hi,
I’m a newbie, and I’m trying to plot horizontal
lines with the following points:
[1,1], [3,1], [2,4] and [4,4].Also, is there a way of putting them together in
lists, (say the pair of points that plot one horizontal line )
for easy plotting? Could anyone please help me with the
code? Thanks.Regards,
Harriet A. Welbeck
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