Errors with fit parameters and correlation coefficient

I am doing spearman linear fit using the code structure given below. It gives me m (slope), c (intercept), correlation coefficients (r, p).

I want standart errors for all these parameters. Can anyone please help me...

m=load('testy.txt');
n=m(:,1);
ne=m(:,2);
o=load('testx.txt');
p=o(:,1);
E = linspace(min(p),max(p),500);
[r,pe]=corr(p,n,'Type','Spearman')
p4 = polyfit(p,n,1)
f4 = polyval(p4,E);