CODEWITHSUNDEEP
rmatrixcorrelation
Eva Frankovic
Eva Frankovic

Reputation: 31

Error in cor(mydata) : 'x' must be numeric

In R, I have been having trouble trying to create a correlation matrix for my data. I keep running into this problem: "Error in cor(mydata) : 'x' must be numeric" and I don't know how to fix it.

> mydata <- Combo[, c(1,2,3,4,5,6,7)]
> head(mydata, 13)

> #computing matrix
> corrmax = cor(mydata)
**Error in cor(mydata) : 'x' must be numeric**
>

enter image description here

Upvotes: 2

Views: 6548

Answers (1)

matheki
matheki

Reputation: 66

I believe not all the data in mydata are numeric. You can test this by running: str(mydata) or sapply(mydata, is.numeric).

If there are variables in mydata that are chr or other non-numeric formats or return FALSE in the case of sapply, you will need to convert them to numeric before running the command or be more selective about the set of variables for which you calculate a correlation. I see strings and percent signs in what you posted. The strings will need to be removed and the formatted percents (%) converted to a numeric representation (decimals).

Upvotes: 3

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