Re: [Matplotlib-users] using subplot to plot a large numbers of graphs in a loop

[Ryan K. <rya...@gm...>]

Here is an example that works for me doing this as John mentioned
(figure 2) or the first way that came to my mind (figure 1):

from numpy import zeros, arange, sin, cos, pi
from pylab import figure, subplot, plot, show, cla, clf
t=3Darange(0,1,0.01)
y=3Dzeros([len(t),4],'d')
y[:,0]=3Dsin(2*pi*t)
y[:,1]=3Dcos(2*pi*t)
y[:,2]=3Dsin(2*pi*t*2+1)
y[:,3]=3Dcos(2*pi*t*2+1)

nc=3D1
nr=3D4

figure(1)
clf()
for x in range(nr):
    subplot(nr,1,x+1)
    plot(t,y[:,x])

figure(2)
clf()
for x in range(nr):
    ax =3D figure(2).add_subplot(nr, 1, x+1)
    ax.hold(False)
    ax.plot(t,y[:,x])
    if ax.is_last_row():
        ax.set_xlabel('time')

show()


On 4/17/06, John Hunter <jdh...@ac...> wrote:
>
> You seem to be mixing idioms, between pylab which manages current
> figure and current axes, and explicitly managing the Figure and Axes
> instances yourself.  Eg
>
>         fig =3D figure()
>         hold(False)  #<-- manipulates current axes
>         for counter in counter_list:
>                 y =3D intensities_calc[counter]
>                 plotnr =3D plotnr+1
>                 ax =3D subplot(rownrs, colnrs, plotnr) #<-- uses current =
fig
>                 fig.add_subplot(ax)
>                 plot(x,y)  #<-- uses current axes
>                 if ax.is_last_row():
>                 ax.set_xlabel('time')
>
> If you want to manage the figure and axes attributes yourself, which
> is good practice, I suggest imposing some discipline on yourself and
> only importing 4 things from pylab (this is what I usually do)
>
>   from pylab import figure, show, nx, close
>
> Your code would then look something like:
>
>     fig =3D figure()
>     for counter in counter_list:
>         y =3D intensities_calc[counter]
>         plotnr =3D plotnr+1
>         ax =3D fig.add_subplot(rownrs, colnrs, plotnr)
>         ax.hold(False)
>         ax.plot(x,y)
>         if ax.is_last_row():
>             ax.set_xlabel('time')
>
> That should work, as long as plotnr is incrementing like you expect it
> to.
>
> JDH
>
>
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