[R] How to fix this problem

[Ivan Calandra]

Dear David,

simply check str(KD6). My guess (because we don't have your dataset, 
only a print of it) is that KD6 is not a matrix but a data.frame. The 
problem seems to come from the column "E..coli" which contains commas 
instead of periods (so text and not number). There might be other issues 
of course.

HTH,
Ivan

On 24/09/2023 20:05, Parkhurst, David wrote:
> I have a matrix, KD6, and I�m trying to get a correlation matrix from it.  When I enter cor(KD6), I get the message �Error in cor(KD6) : 'x' must be numeric�.
> Here are some early lines from KD6:
>          Flow  E..coli        TN    SRP     TP    TSS
> 1      38.8    2,420    1.65300 0.0270 0.0630  66.80
> 2     133.0    2,420    1.39400 0.0670 0.1360   6.80
> 3      86.2       10    1.73400 0.0700 0.1720  97.30
> 4       4.8    5,390    0.40400 0.0060 0.0280   8.50
> 5       0.3    2,490    0.45800 0.0050 0.0430  19.75
> 6       0.0      186    0.51200 0.0040 0.0470  12.00
> 7      11.1    9,835    1.25500 0.0660 0.1450  12.20
>
> Why are these not numeric?
> There are some NAs later in the matrix, but I get this same error if I ask for cor(KD6[1:39,]) to leave out the lines with NAs.  Are they a problem anyway?
>
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