Finding a linear equation

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TRAILOKYA 2019-11-5

编辑： JESUS DAVID ARIZA ROYETH 2019-11-5

I have three variable like x,y, z. I need to find a linear relation between them like z=c1*x+c2*y+c3. Please help. Thanks

solution example:

x=rand(1,20);
y=rand(1,20);
z=3*x+4*y+7;
b=regress(z',[x' y' ones(size(x'))]);
fprintf('Equation is z=%0.2fx+%0.2fy+%0.2f\n',b)

TRAILOKYA 2019-11-5

I have three data sets for x, y, z. I need to find z=f(x,y). Like the following z=x+c1*y-c2 (someone measured like this)

I dont understand why you have taken the coefficients for z already.

编辑：JESUS DAVID ARIZA ROYETH 2019-11-5

because it is an example you can put anything in z and the program will look for the coefficients for you, x, y, z is your dataset

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