Urgent Help with R calculation correlation coefficient

Tab delimited file looks like this

Id v1   v2    v3
df 56   90    45
gh 87   98    78
ty 89    78    67

I used this code


[code]

gse20437 <- read.csv("C:/Users//Desktop/data/GSE20437_matrix.txt",header =
TRUE, sep = ",", strip.white = TRUE)

gsecor <- cor(gse20437, method ="pearson") or

gsecor <- cor(gse20437)

[/code]

i get error x must be numeric..