Hi Everyone,
I have a question regarding the construction of 3D graphs in 'R', BUT these graphs also need to illustrate movement (with time) of the prostate gland (using radiological techniques). I am not sure how to do this in 'R' although I'm sure there is some way of doing it. Below, I have copied and pasted some of the data with which I'm working on. The data are for axial images of the prostate for four patients (N1, N2, N3 and N4) over 20 time points. The numbers represent the average amplitude of movement by the prostate gland in mm. The signs (positive and negative) indicate movement away from or toward the baseline, respectively. So, any deviation away from the baseline is '+' and any excursion toward baseline is negative (with the baseline indicated by Time=0). I would like to plot 3D graphs illustrating movement of the prostate with time for each of the four patients but do not know how. I am not an expert in 'R' so any help will be very, very much appreciated. Thanks. Best wishes, Suzanne Time N1 N2 N3 N4 0 0 0 0 0 1 121.8 -60.6 69.8 -122.6 2 19.9 -101.1 77.2 -142.9 3 19.9 -101.1 77.2 -120.4 4 19.9 -101.1 25.8 -131.1 5 44.2 -111.7 25.8 -128.6 6 44.2 -111.7 25.8 -305.7 7 50.5 -111.7 25.8 -232.4 8 75.8 -111.7 121.1 -201.8 9 63 -111.7 121.1 -201.8 10 3.3 -111.7 121.1 -201.8 11 38.9 -111.7 76.4 -175 12 38.9 -111.7 76.4 -175 13 -1.1 -111.7 76.4 -178.8 14 -103.1 -111.7 76.4 -176.2 15 -49.4 -111.7 76.4 -176.2 16 -80.6 -56.5 76.4 -176.2 17 -12.5 -94.7 -37.9 -171.6 18 -12.5 -94.7 -19.8 -186.4 19 -12.5 -94.7 -19.8 -241.1 20 -12.5 -59.4 9.8 -200 Suzanne St.Rose (DVM, MSc, PhD) Statistician Royal Marsden NHS Foundation Trust Fulham Road London SW3 6JJ Telephone: 0207 808 2186 Email: suzanne.str...@rmh.nhs.uk ######################################################################### Attention:\ This e-mail and any attachment is for author...{{dropped:19}} ______________________________________________ R-help@r-project.org 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.