Re: [Matplotlib-users] Turning grid on

[Youngung J. <you...@gm...>]

I think the problem is associated with the way np.arange is used.

"np.arange(0,10,20)" would return array[0]

If you still would like to manually configure the tick positions the way
you seemed to want, you can use "np.linspace".


Below worked for me.
----


import matplotlib.pyplot as plt
import numpy as np

fig = plt.figure()
ax = fig.add_subplot(1,1,1)

x = np.linspace(0,10,50)
y = np.sin(x)

ax.plot(x,y)
ax.grid('on')

leg = plt.legend(['legend 1'])
plt.title('Sample title')
ax.set_ylabel('Sample ylabel')
ax.set_xlabel('Sample xlabel')

ax.set_xticks(np.linspace(0, 10, 11))
ax.set_yticks(np.linspace(-1,1,11))

ax.minorticks_on()

plt.show()






*  Youngung Jeong*

On Wed, Jun 3, 2015 at 9:27 AM, <st...@th...> wrote:

> Hm, I tried both suggestions, and still no grid (removed PDF for
> simplicity):
>
> import matplotlib.pyplot as plt
> import numpy as np
>
> fig = plt.figure()
> ax = fig.add_subplot(1,1,1)
>
> x = np.linspace(0,10,50)
> y = np.sin(x)
>
> plt.clf()
>
> plt.clf()
> plt.plot(x,y)
> leg = plt.legend(['legend 1'])
> plt.title('Sample title')
> ax.set_ylabel('Sample ylabel')
> ax.set_xlabel('Sample xlabel')
>
> ax.set_xticks(np.arange(0, 10, 20))
> ax.set_xticks(np.arange(0, 10, 5), minor=True)
> ax.set_yticks(np.arange(-1,1,20))
> ax.set_yticks(np.arange(-1,1,20), minor=True)
>
> ax.minorticks_on()
> ax.grid('on')
> plt.show()
>
>
>
> > And if you meant 'grid', I guess
> >
> >      ax.grid('on')
> >
> > should be added.
> >
> > *  Youngung Jeong, ì •ì˜ ì›…*
> >
> > On Mon, Jun 1, 2015 at 4:38 PM, Sterling Smith <sm...@fu...>
> > wrote:
> >
> >> Stephen,
> >>
> >> In your script, you give
> >> ax.minorticks_on
> >> but you need to call that function for anything to occur
> >> ax.minorticks_on()
> >>
> >>
> >> Also, did you see
> >> http://matplotlib.org/examples/pylab_examples/axes_props.html
> >> in case your original question was not answered.
> >>
> >> -Sterling
> >>
> >> On Jun 1, 2015, at 1:24PM, st...@th... wrote:
> >>
> >> > I only see that you added "plt.show()", but neither the grid or the
> >> axis
> >> > labels are showing up.
> >> >
> >> >> Here is what I see with a couple of things modified ?
> >> >> did you expect something else ?
> >> >>
> >> >> from matplotlib.backends.backend_pdf import PdfPages
> >> >> import matplotlib.pyplot as plt
> >> >> import numpy as np
> >> >>
> >> >> fig = plt.figure()
> >> >> ax = fig.add_subplot(1,1,1)
> >> >>
> >> >> x = np.linspace(0,10,50)
> >> >> y = np.sin(x)
> >> >>
> >> >> with PdfPages('grid_test.pdf') as pdf:
> >> >>    plt.clf()
> >> >>
> >> >> plt.clf()
> >> >> plt.plot(x,y)
> >> >> leg = plt.legend(['legend 1'])
> >> >> plt.title('Sample title')
> >> >> ax.set_ylabel('Sample ylabel')
> >> >> ax.set_xlabel('Sample xlabel')
> >> >>
> >> >> ax.set_xticks(np.arange(0, 10, 20))
> >> >> ax.set_xticks(np.arange(0, 10, 5), minor=True)
> >> >> ax.set_yticks(np.arange(-1,1,20))
> >> >> ax.set_yticks(np.arange(-1,1,20), minor=True)
> >> >>
> >> >> ax.minorticks_on
> >> >> plt.show()
> >> >>
> >> >> pdf.savefig()
> >> >>
> >> >>
> >> >> [cid:8C8...@or...]
> >> >>
> >> >>
> >> >>
> >> >> On Jun 1, 2015, at 2:49 PM,
> >> >> <st...@th...<mailto:st...@th...>>
> >> >> wrote:
> >> >>
> >> >> I am having an issue with the grid not appearing that I cannot figure
> >> out.
> >> >> Can anyone help? Thanks. --StephenB
> >> >>
> >> >> from matplotlib.backends.backend_pdf import PdfPages
> >> >> import matplotlib.pyplot as plt
> >> >> import numpy as np
> >> >>
> >> >> fig = plt.figure()
> >> >> ax = fig.add_subplot(1,1,1)
> >> >>
> >> >> x = np.linspace(0,10,50)
> >> >> y = np.sin(x)
> >> >>
> >> >> with PdfPages('grid_test.pdf') as pdf:
> >> >>   plt.clf()
> >> >>
> >> >>   plt.clf()
> >> >>   plt.plot(x,y)
> >> >>   leg = plt.legend(['legend 1'])
> >> >>   plt.title('Sample title')
> >> >>   ax.set_ylabel('Sample ylabel')
> >> >>   ax.set_xlabel('Sample xlabel')
> >> >>
> >> >>   ax.set_xticks(np.arange(0, 10, 20))
> >> >>   ax.set_xticks(np.arange(0, 10, 5), minor=True)
> >> >>   ax.set_yticks(np.arange(-1,1,20))
> >> >>   ax.set_yticks(np.arange(-1,1,20), minor=True)
> >> >>
> >> >>   ax.minorticks_on
> >> >>
> >> >>   pdf.savefig()
> >> >>
> >> >>
> >> >>
> >>
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> >> >>
> >> >>
> >> >>
> >> >
> >> >
> >> >
> >> >
> >>
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