Applying different equations to sections of a column using a for loop

Hi,

Could anyone tell me how to apply a linear function (I know the coeeficients a and b) to a section of a col and another set of coefficents to another section of the col.

For example my col is 300 rows long. I want to apply y=a1x+b1 to 1 through 100, y=a2x+b2 to rows 101 through 200...

Thanks!

[darova]

I don't understood. You have 300 coefficients or you have 300 values of x? What is col?

[Kimberly Hess]

The column represents time it counts up by 1 in each row. for a section of rows i need to apply the function to modify how it counts.

Answer 1

[darova]

What about for loop?

for i = 1:300
    if i <= 100
        y(i) = a1*x(i)+b1(1);
    elseif i <= 200
        y(i) = a2*x(i)+b2(1);
    elseif
        y(i) = a*x(i)+b(1);
    end
end
plot(x,y)

[Kimberly Hess]

you got me on the right path! thanks!