Undefined function 'regress' for input arguments of type 'double'. Issue

I get "Undefined function 'regress' for input arguments of type 'double'. error message when I run following code.

I am using R21014a.

xShrink is 90 x 6 Double. And I ma trying to perform linear regression between column 3 (x value) and 1 (y value),

load xShrink;
col1=(ones(length(xShrink),1));
[B,BINT]=regress(xShrink(:,3),[xShrink(:,1) col1])
figure(1);clf;
x=[15 335];
y=B(1)*x+B(2);
plot(xShrink(:,3),xShrink(:,1),'ko',x,y,'k--');
xlabel('Maximum Machine Pressure (psi)');
ylabel('Maximum Cavity Pressure - Post Gate (psi)');

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I need help to run this code by eliminating "Undefined function 'regress' for input arguments of type 'double'." error.

Thanks

Answer 1

[Azzi Abdelmalek]

Check if you have statistics toolbox

[Rahul Panchal]

how can i find out if i have statistics tool box?

[Azzi Abdelmalek]

Type

which  statistics

[Rahul Panchal]

it gives following answer

which statistics 'statistics' not found.

[Azzi Abdelmalek]

You haven't this toolbox

[Rahul Panchal]

thanks