Re: [Matplotlib-users] Plotting with times - axis labels and eliding times

[Mike A. <mba...@wi...>]

Hi,

>    * The time ranges are large (one-second samples over a period of
>      several days) and I find the x axis label formats are often
>      inappropriate to the scale.  How to I control the format of
>      the x axis labels?
>

I only started using matplolib a few days ago, but I think I know how  
to do what you want:

----------------------------------------
import matplotlib.dates as mdates  # To read timestamps
    ...
xAxisTimeFormat   = '%a\n%H:%M'     # Format of time stamps on x-axis
hourLocator       = mdates.HourLocator(interval=5)    # Every 5 hours
minuteLocator     = mdates.MinuteLocator(interval=30) # Every half hour
   ...
ax.xaxis.set_major_locator(hourLocator)    # Set major tick marks
ax.xaxis.set_minor_locator(minuteLocator) # Set minor tick marks
ax.xaxis.set_major_formatter(mdates.DateFormatter(xAxisTimeFormat))  #  
Format x-axis labels
----------------------------------------

I have a full example of plots that have a point every minute over the  
course of days:
   http://www.hep.wisc.edu/cms/comp/routerqMonitor/index.html
with a link to the full python script at the bottom.

Mike