[Qgis-user] convert point data to color gradient

[Stephen Leake]

I'm using Qgis 2.2.0-Valmiera 64 bits, on MS Windows 7.

I'm just getting started with Qgis, and GIS in general.

I'm trying to create a map similar to
http://nadp.sws.uiuc.edu/maplib/pdf/mdn/hg_Conc_2011.pdf, with updated
data, and for Kansas only.

I have data in an MS Excel spreadsheet; I can import that to QGIS via a
.csv intermediate.

Now I need to convert that point data into a color gradient. 

I found Processing | SAGA | Grid - visualization | color blending, but
when I run it, the log just says "error"

Any suggestions?

-- 
-- Stephe