[R] Correlate

[Val]

Hi all,

I have a data set with  ~250  variables(columns).  I want to calculate
the correlation of  one variable with the rest of the other variables
and also want  the p-values  for each correlation.  Please see the
sample data and my attempt.  I  have got the correlation but unable to
get the p-values

dat <- read.table(text="x1 x2 x3 x4
           1.68 -0.96 -1.25  0.61
          -0.06  0.41  0.06 -0.96
              .    0.08  1.14  1.42
           0.80 -0.67  0.53 -0.68
           0.23 -0.97 -1.18 -0.78
          -1.03  1.11 -0.61    .
           2.15     .    0.02  0.66
           0.35 -0.37 -0.26  0.39
          -0.66  0.89   .    -1.49
           0.11  1.52  0.73  -1.03",header=TRUE)

#change all to numeric
    dat[] <- lapply(dat, function(x) as.numeric(as.character(x)))

    data_cor <- cor(dat[ , colnames(dat) != "x1"],  dat$x1, method =
"pearson", use = "complete.obs")

Result
              [,1]
x2 -0.5845835
x3 -0.4664220
x4  0.7202837

How do I get the p-values ?

Thank you,