Hi, I've got some data in a data frame arranged like this: x y z othervariables .... 0.1 0.2 1.7 0.01 .... 0.2 0.2 1.3 0.23 .... 0.2 0.3 1.1 0.43 .... etc
I'd like to plot a heatmap of this data, with x and y as the (x,y) co- ords and z defining the colour at each point. I'm having difficulty finding the correct functions to use. Can anyone make any recommendations? It seems straightforward to make the plot using the image function if the data is in matrix form, but I'm not sure how to transform my xyz data into matrix form. Many thanks in advance for your help. Best wishes, Trevor ------------------------------------------------------------- Trevor Graham Centre for Mathematics and Physics in the Life Sciences and Experimental Biology (CoMPLEX) Cancer Research UK CoMPLEX, Wolfson House University College London, Gower Street London WC1E 6BT, UK Tel: +44 (0)20 7679 5088 Internal: 25088 http://trevor.complex.ucl.ac.uk ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.