[R] Simple plotting errors

[Steve Murray]

Dear R Users,

I have 12 data frames, each of 12 rows and 2 columns.

e.g. FeketeJAN
                   MEAN    SUM_
AMAZON      144.4997874 68348.4
NILE          5.4701955  1394.9
CONGO        71.3670036 21196.0
MISSISSIPPI  18.9273250  6511.0
AMUR          1.8426874   466.2
PARANA       58.3835497 13486.6
YENISEI       1.4668313   592.6
OB            1.4239179   559.6
LENA          0.9342164   387.7
NIGER         4.7245709   826.8
ZAMBEZI      76.6893794  8665.9
YANGTZE      10.6759257  1729.5


I want to do a line plot of the value of Amazon 'Sum' (in this case, 68348.4) for each of the 12 data frames. I've tried doing this as follows:

plot(FeketeJAN[1,2], FeketeFEB[1,2], FeketeMAR[1,2], *through to December* type="l")

but receive: Error in strsplit(log, NULL) : non-character argument


I've also tried:

plot(FeketeJAN$AMAZON[,2], FeketeFEB$AMAZON[,2], *through to December* type="l")

but receive:

Error in plot.window(...) : need finite 'xlim' values
In addition: Warning messages:
1: In min(x) : no non-missing arguments to min; returning Inf
2: In max(x) : no non-missing arguments to max; returning -Inf
3: In min(x) : no non-missing arguments to min; returning Inf
4: In max(x) : no non-missing arguments to max; returning -Inf


What is it that I'm doing wrong?!

Many thanks for any advice,

Steve



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