[R] Simple plotting errors

[Uwe Ligges]

Steve Murray wrote:
> 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?!


Well, beside the infelicity of having 12 data.frames to represent one 
year, your need to make a vector of those values as in:


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


Uwe Ligges



> Many thanks for any advice,
> 
> Steve
> 
> 
> 
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