Hi, I would like to make a contour plot using R with the following information
(data at the end): x-axis= arranged according to day (from 1 to 365, labels=
use months; up to 365 days in one year), y-axis= depth (labels from 0 at the
top to 7 at the bottom; this is a water depth profile), and z-axis= pH. So,
this would be a pH contour plot of different dates throughout a year, with pH
measured at different depths (0 meter to 7 meters). I tried to use various
contour plot packages, but always have trouble with y axis data that are not
arranged in ascending order thus failed to make a matrix for data in the z-axis
(pH). So, I used akima to make a matrix
(data.interp<-interp(x,y,z,duplicate="mean")) but the results is a square
matrix- Not sure if the data is correct. So, any help/suggestion would be
great! An example image that I would like to make is here:
http://neuer.lab.asu.edu/images/10_data/roosevelt_temp.JPG
Thanks so much!
Leo
Data:
Day Month Depth pH
23 Jan 0 4.9
23 Jan 3 4.93
23 Jan 7 5.05
52 Feb 0 4.93
52 Feb 3 4.92
52 Feb 7 5.54
86 Mar 0 4.93
86 Mar 3 5.09
86 Mar 7 5.32
115 Apr 0 4.92
115 Apr 3 4.88
115 Apr 7 5.385
142 May 0 4.99
142 May 2 4.805
142 May 5 5.31
142 May 7 5.41
169 Jun 0 4.935
169 Jun 2 4.66
169 Jun 3 4.96
169 Jun 7 5.55
198 Jul 0 5.19
198 Jul 3 5.1
198 Jul 5 5.59
198 Jul 7 5.8
225 Aug 0 5.05
225 Aug 2 4.88
225 Aug 5 5.31
225 Aug 7 5.53
225 Sep 0 4.78
225 Sep 2 4.76
225 Sep 5 5.22
225 Sep 6 5.4
282 Oct 0 4.8
282 Oct 3 4.91
282 Oct 5 5.185
282 Oct 6 5.32
319 Nov 0 5.06
319 Nov 3 5.05
319 Nov 7 5.11
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