Pablo Romero wrote: > > Im having an issue where contourf is producing visible defects in the shaded > contours (within png output) with alpha values that are less then 1.0. >
Pablo, See http://www.mail-archive.com/matplotlib-users@lists.sourceforge.net/msg10245.html and my reply to that. I have an idea about how to solve the problem, but it is not trivial and won't happen soon--unless someone else wants to work on it. Filled contours are surprisingly hard to get right! Eric > Ive attached two images. > - the first image,contourf_no_alpha.png, shows my contour plot with the alpha > value left at its default > (i.e.,alpha is not set, so alpha=1.0). > > - the second image, contourf_with_alpha.png, shows the same contoured data, > yet with the alpha set to 0.75. > There are vertical lines visible where the contours are apparently being > closed/joined? > > I added pink contour lines in order to show that these vertical lines are NOT > actually part of the contour. > > these are the commands that I used: > > Z=create_my_data() > > ... > > # image 1 (contourf_no_alpha.png) > cs=m.contourf(X,Y,Z,lev) > cs=m.contour(X,Y,Z,lev,colors='pink'linewidths=1.5) > > # image 2 (contourf_with_alpha.png) > cs=m.contourf(X,Y,Z,lev,alpha=0.75) > cs=m.contour(X,Y,Z,lev,colors='pink',linewidths=1.5) > > Im running the latest versions of basemap&matplotlib. > > How can I remove these vertical defects while still being able to use > "semi-transparent" alpha values? > > Please help, > > Thanks, > > P.Romero > _________________________________________________________________ > Hotmail® is up to 70% faster. Now good news travels really fast. > http://windowslive.com/online/hotmail?ocid=TXT_TAGLM_WL_HM_70faster_032009 > > > ------------------------------------------------------------------------ > > > ------------------------------------------------------------------------ > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------------ > Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are > powering Web 2.0 with engaging, cross-platform capabilities. Quickly and > easily build your RIAs with Flex Builder, the Eclipse(TM)based development > software that enables intelligent coding and step-through debugging. > Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com > > > ------------------------------------------------------------------------ > > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users ------------------------------------------------------------------------------ Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
