[Plplot-cvs] SF.net SVN: plplot:[9175] trunk/examples

[<and...@us...>]

Revision: 9175
          http://plplot.svn.sourceforge.net/plplot/?rev=9175&view=rev
Author:   andrewross
Date:     2008-12-17 21:53:57 +0000 (Wed, 17 Dec 2008)

Log Message:
-----------
Update C and python versions of example 31 to avoid testing for 
equality of real numbers. Rounding errors on some system could cause 
these tests to fail erroneously.

Modified Paths:
--------------
    trunk/examples/c/x31c.c
    trunk/examples/python/xw31.py

Modified: trunk/examples/c/x31c.c
===================================================================
--- trunk/examples/c/x31c.c	2008-12-17 21:52:41 UTC (rev 9174)
+++ trunk/examples/c/x31c.c	2008-12-17 21:53:57 UTC (rev 9175)
@@ -213,7 +213,10 @@
   plsdiplz(0.1, 0.1, 0.9, 0.9);
   plgdiplt(&zxmin, &zymin, &zxmax, &zymax);
   printf("zoomed plot-space window parameters: xmin, ymin, xmax, ymax = %f %f %f %f \n", zxmin, zymin, zxmax, zymax);
-  if (zxmin != xmin + (xmax-xmin)*0.1 || zxmax != xmin+(xmax-xmin)*0.9 || zymin != ymin+(ymax-ymin)*0.1 || zymax != ymin+(ymax-ymin)*0.9) {
+  if ( fabs(zxmin -(xmin + (xmax-xmin)*0.1)) > 1.0E-5 || 
+       fabs(zxmax -(xmin+(xmax-xmin)*0.9)) > 1.0E-5 || 
+       fabs(zymin -(ymin+(ymax-ymin)*0.1)) > 1.0E-5 || 
+       fabs(zymax -(ymin+(ymax-ymin)*0.9)) > 1.0E-5 ) {
     fputs("plsdiplz test failed\n",stderr);
     plend();
     exit(1);

Modified: trunk/examples/python/xw31.py
===================================================================
--- trunk/examples/python/xw31.py	2008-12-17 21:52:41 UTC (rev 9174)
+++ trunk/examples/python/xw31.py	2008-12-17 21:53:57 UTC (rev 9175)
@@ -187,7 +187,7 @@
     plsdiplz(0.1, 0.1, 0.9, 0.9)
     (zxmin, zymin, zxmax, zymax) = plgdiplt()
     sys.stdout.write("zoomed plot-space window parameters: xmin, ymin, xmax, ymax = %f %f %f %f \n" % (zxmin, zymin, zxmax, zymax))
-    if zxmin != xmin+(xmax-xmin)*0.1 or zxmax != xmin+(xmax-xmin)*0.9 or zymin != ymin+(ymax-ymin)*0.1 or zymax != ymin+(ymax-ymin)*0.9:
+    if abs(zxmin -(xmin + (xmax-xmin)*0.1)) > 1.0E-5 or abs(zxmax -(xmin+(xmax-xmin)*0.9)) > 1.0E-5 or abs(zymin -(ymin+(ymax-ymin)*0.1)) > 1.0E-5 or abs(zymax -(ymin+(ymax-ymin)*0.9)) > 1.0E-5 :
         sys.stderr.write("plsdiplz test failed\n")
         plend()
         sys.exit(1)


This was sent by the SourceForge.net collaborative development platform, the world's largest Open Source development site.