Thread: [Matplotlib-users] 1-10^-1 Custom Log Ticker

Hi,

As the subject shows, I am trying to create a custom ticker (class??) that
has pretty formatted log tick.

Instead of just 10^-5, 10^-5, etc, is something more like
[1-10^-2, 1-10^-3, 1-10^-4] etc

I am histogram'n a set of data that is very close to 1, basically ranging
from 0.990 and 0.9922, but mostly being centered on 0.9921. I would love to
see meaningful labels.

Any ideas?
-- 
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import matplotlib.ticker as tick
def showOnlySomeTicks(x, pos):
     s = str(int(x))
     if x == 5000:
         return    '5e3'#'%.0e' % x
     return ''
ax = plt.axes([0.165,0.2,0.95-0.24,0.95-0.2])
ax.xaxis.set_minor_formatter(tick.FuncFormatter(showOnlySomeTicks))

Then in the code something just change xaxis to yaxis or vice versa. Can 
also set the major formatter like this. Not sure if this is what you 
were looking for but it seems you want custom tick labels. Can also set 
the location of the ticks and check ticker page below for more info.

For setting a different base check the multiplelocater from the ticker 
class here:
http://matplotlib.sourceforge.net/api/ticker_api.html

On 09/07/2011 08:03 PM, shaunh1 wrote:
> Hi,
>
> As the subject shows, I am trying to create a custom ticker (class??) that
> has pretty formatted log tick.
>
> Instead of just 10^-5, 10^-5, etc, is something more like
> [1-10^-2, 1-10^-3, 1-10^-4] etc
>
> I am histogram'n a set of data that is very close to 1, basically ranging
> from 0.990 and 0.9922, but mostly being centered on 0.9921. I would love to
> see meaningful labels.
>
> Any ideas?