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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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? > > [[alternative HTML version deleted]] > > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code.
On Sun, 24 Sep 2023 18:05:43 +0000 "Parkhurst, David" <parkhurs at indiana.edu> 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 6.80Use str(KD6) to find out the types of every column of the KD6 data frame. There may be some non-numeric strings later in the document preventing R from converting them to numeric automatically. A brute force solution is as.numeric(), perhaps preceded by some string manipulation, but it's better to find out why the strings were considered non-numeric in the first place. -- Best regards, Ivan
David,
This may just be the same as your earlier problem. When the type of a column is
guessed by looking at the early entries, any non-numeric entry forces the entire
column to be character.
Suggestion: fix your original EXCEL FILE or edit your CSV to remove the last
entries that look just lie commas.
-----Original Message-----
From: R-help <r-help-bounces at r-project.org> On Behalf Of Parkhurst,
David
Sent: Sunday, September 24, 2023 2:06 PM
To: r-help at r-project.org
Subject: [R] How to fix this problem
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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