You may just want to start with the "custom_ticker1.py" example here:
http://matplotlib.sourceforge.net/examples/pylab_examples/custom_ticker1.html The meat of it is just to provide a function that converts the incoming values (in your case pixel positions) into whatever you want to be displayed. Cheers, Mike Jeremy Lewi wrote: > I want to let matplotlib control where the tick marks go, but I want > to scale the value of the tick labels. For example, > if my matrix has a 100 columns the tick marks might be [0,25,50,100]. > I want to scale these tick labels by some value say .01 so that the > corresponding tick labels would be [0,.25,.5,1]. > > Now say I zoom in on the image so that the xaxis limits are (0,50). > Lets suppose the tick marks are now [0,10,20,30,40,50] > Then in this case the tick labels should be > [0,.1,.2,.3,.4,.5] > > So how do I go about creating a custom formatter? > > Thanks > Jeremy > > Michael Droettboom wrote: >> What are you setting the x ticklabels to? If you want to control how >> the numbers are displayed, you can create a custom formatter (which >> is basically a function to convert a floating-point number to a >> string). If you want to control the number of ticks across the axis, >> you can make a custom ticker. >> >> If you can describe what your end goal is, I'm happy to describe the >> above options in more detail. >> >> Cheers, >> Mike >> >> Jeremy Lewi wrote: >> >>> Hi, >>> I'm using imshow to make an image of a 2-d matrix. I use >>> set_xticklabels to adjust the x-axis labels. The problem is that >>> when I then zoom in on the plot, the axis labels are not adjusted >>> appropriately. Does anyone suggestions on how I can fix this? >>> >>> Thanks >>> Jeremy >>> >>> ------------------------------------------------------------------------------ >>> >>> >>> Crystal Reports - New Free Runtime and 30 Day Trial >>> Check out the new simplified licensing option that enables unlimited >>> royalty-free distribution of the report engine for externally facing >>> server and web deployment. >>> http://p.sf.net/sfu/businessobjects >>> _______________________________________________ >>> Matplotlib-users mailing list >>> Matplotlib-users@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users >>> >> >> > -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
