multiple scales on same axes

svn path=/trunk/matplotlib/; revision=246

Author: jdh2358

CHANGELOG

@@ -1,12 +1,16 @@
 New entries should be added at the top
 
+2004-04-17 Added support for two scales on the "same axes" with tick
+           different ticking and labeling left right or top bottom.
+           See examples/two_scales.py - JDH
+
 2004-04-17 Added default dirs as list rather than single dir in
 	   setupext.py - JDH
 
 2004-04-16 Fixed wx exception swallowing bug (and there was much
            rejoicing!) - JDH
 
-2004-04-16 Added new ti huncker locator a formatter, fixed default font
+2004-04-16 Added new ticker locator a formatter, fixed default font
            return - JDH
 
 2004-04-16 Added get_name method to FontProperties class. Fixed font lookup

TODO

@@ -222,7 +222,7 @@
 
 -- DONE 2004-02-17 make legend attributes accessible
 
--- decreasing axes - James Boyle <boyle5@llnl.gov>
+-- DONE decreasing axes - James Boyle <boyle5@llnl.gov>
 
 
 -- check out Helge's contour
@@ -242,7 +242,7 @@
 
 -- DONE 2004-02-25 fix setup.py to build ft2
 
--- TkAgg resize (test on win32)
+-- DONE TkAgg resize (test on win32)
 
 -- DONE TkAgg interactive on win32
 
@@ -258,7 +258,7 @@
 
 -- DONE - (Todd updated docs) - python2.2 no default tkinter
 
--- check out wx
+-- DONE check out wx
 
 -- DONE 2004-03-02 - fix ft2font clipping on agg
 
@@ -290,7 +290,7 @@
 
 -- add pie charts
 
--- support fontdicts, with deprecation as necessary
+-- DONE support fontdicts, with deprecation as necessary
 
 -- move text layout to front end and support newlines with rotation.
 
@@ -310,4 +310,7 @@
 
 -- ps backend fails alignment test
 
--- ps backend is slow!  parsing afm files!
+-- ps backend is slow!  Almost all of this is eaten by parsing afm
+   files
+
+-- decreasing log axes needs fix

examples/backend_driver.py

@@ -17,18 +17,23 @@
     'barchart_demo.py',
     'color_demo.py',
     'csd_demo.py',
+    'date_demo1.py',
+    'date_demo2.py',    
     'fill_demo.py',
     'figtext.py',
     'histogram_demo.py',
     'image_demo.py',
     'image_demo2.py',
+    'invert_axes.py',
     'legend_demo.py',
     'legend_demo2.py',
     'line_styles.py',
     'log_demo.py',
     'log_test.py',
     'mathtext_demo.py',
     'mri_with_eeg.py',
+    'major_minor_demo1.py',
+    'major_minor_demo2.py',     
     'multiple_figs_demo.py',
     'pcolor_demo.py',
     'pcolor_demo2.py',

examples/invert_axes.py

@@ -0,0 +1,20 @@
+"""
+
+You can use decreasing axes by flipping the normal order of the axis
+limits
+
+"""
+from matplotlib.matlab import *
+
+t = arange(0.01, 5.0, 0.01)
+s = exp(-t)
+plot(t, s)
+
+set(gca(), 'xlim', [5,0])  # decreasing time
+
+xlabel('decreasing time (s)')
+ylabel('voltage (mV)')
+title('Should be growing...')
+grid(True)
+
+show()

examples/two_scales.py

@@ -0,0 +1,36 @@
+"""
+
+Demonstrate how to do two plots on the same axes with different left
+right scales.
+
+
+The trick is to use *2 different axes*.  Turn the axes rectangular
+frame off on the 2nd axes to keep it from obscuring the first.
+Manually set the tick locs and labels as desired.  You can use
+separate matplotlib.ticker formatters and locators as desired since
+the two axes are independent
+
+To do the same with different x scales, use the xaxis instance and
+call tick_bottom and tick_top in place of tick_left and tick_right
+
+"""
+
+from matplotlib.matlab import *
+
+ax1 = subplot(111)
+t = arange(0.0, 10.0, 0.01)
+s1 = exp(t)
+plot(t, s1, 'b-')
+ax1.yaxis.tick_left()
+
+
+# turn off the 2nd axes rectangle with frameon kwarg
+ax2 = subplot(111, frameon=False) 
+s2 = sin(2*pi*t)
+plot(t, s2, 'r.')
+ax2.yaxis.tick_right()
+
+
+xlabel('time (s)')
+
+show()