Hi, being a newbie myself, .. I don't know if I'm misguiding you. But do wonder if you looked at the scatter command see scatter_demo2.py on http://matplotlib.sourceforge.net/screenshots.html for an example
It *seems* like it already does what you are trying to do?, maybe I'm missing something in my understanding. Steve Andrew McLean wrote: > I'm a new user of matplotlib (athough I have been using both Matlab and > Python for years). > > I have an application where I need to display data as a set of filled > circles. The centre and the radius of the circles are both specified in > data coordinates. The data points have an additional scalar attribute, > which is displayed using a pseudo-colour mapping. > > I've hacked something together where the circles are approximated by > polygons using either the axis fill method or the pylab fill function. I > select the colour by calling the get_rgba method of a ScalarMappable > object. In the following code snippet c is a tuple containg the x and y > coords of the centre of the circle, the radius, and a scalar "value" > > theta = arange(numSegs+1) * 2.0 * math.pi / numSegs > cos_theta = cos(theta) > sin_theta = sin(theta) > for c in cart: > x = c[1] + c[3] * cos_theta > y = c[2] + c[3] * sin_theta > v = c[4] > fill(x, y, facecolor=mapper.to_rgba(v), linewidth=0.5) > > It all works. However, I saw in the API documentation (and the source) > that there is a Circle object in patch. I was hoping that using this > rather than polygons would give better quality output and possibly > smaller files. Now I can instantiate it > > circle = Circle((x,y), c[3], facecolor=cmapper.to_rgba(v)) > > but can't work out what to do with it! I've tried > > ax.add_patch( circle ) > > and also > > trans = blend_xy_sep_transform( ax.transAxes, ax.transData ) > circle.set_transform( trans ) > ax.add_patch( circle ) > > Neither work. Any ideas? > > Regards, > > Andrew > > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > > ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
