How to do linear fitting of data to get R square value and coeficient of a,b ?

I got x and y value. I want to fit the date linearly . I want to get Rsquare value and value of a and b. How to do in matlab?

Answer 1

[Ive J]

n = 100;
x = randn(n, 1);
y = randn(n, 1);

mdl = fitlm(x, y)

mdl = 
Linear regression model:
    y ~ 1 + x1

Estimated Coefficients:
                   Estimate      SE        tStat     pValue 
                   ________    _______    _______    _______

    (Intercept)    0.014768    0.10405    0.14193    0.88742
    x1              0.11976    0.10612     1.1286    0.26182


Number of observations: 100, Error degrees of freedom: 98
Root Mean Squared Error: 1.03
R-squared: 0.0128,  Adjusted R-Squared: 0.00276
F-statistic vs. constant model: 1.27, p-value = 0.262

[Debarati Ghosh]

@Ive J Thank you sir