search for: roosevelt_temp

Hi, I would like to make a contour plot with the data below, x-axis= Day (increasing order, day number is out of 365 days of a year), y-axis= Depth (varies), and z=pH. I tried to use filled.contour function, but not sure the proper way to ordinate my z results into a matrix with different x and y length. After that, if I attempted to plot the data, the x and y values are not in ascending

...(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 4.93...