I am not sure what "set of values" you are looking for. The output from the call:
p = kruskalwallis(X)
is simply the p value for the hypothesis test with null hypothesis H0: The columns of X all come from the same distribution and alternative hypothesis H1: At least one column comes from a different distribution. The table and stats variables simply give you more information regarding this test.
To interpret p, choose a significance level alpha (common choices are 0.01, 0.05, 0.1) and if the p value is less than alpha you would reject the null in favor of the alternative. Otherwise you would conclude there is statistical evidence to support the null hypothesis.
