Dear R-users,
I build already many contour graphs using the contour-procedure in R (akima
library), after interpollating my data z on x,y (see e.g. graphs in this paper:
http://www.biomedcentral.com/content/pdf/1471-2148-9-16.pdf).
Now, however, i experience unexpected and completely unsensible problems: after
building the syntax, i can create the graphs and use the interp-command without
any problems. However, after shutting down R and opening the saved syntax (that
worked), i now get the error message that the 'interp.old' doesn't calculate
due to collinearity in the data (which is not the case). So, i am now unable to
create the graphs that i was used to build.
Has anyone got this problem before and, if yes, how was it solved?
Many thanks for the help,
Dries
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