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**MatLab "for" loops**

## Homework Statement

Write an m-file to evaluate y(x)= x^2 - 3x +2 for all values of x between -1 and 3, in steps of .1 . Do this twice, once with a for loop and once with vectors. Plot the resulting functions.

## Homework Equations

## The Attempt at a Solution

count=0;

for x= -1:.1:3

count = count+1;

y(count)= x.^2 -3*x +2;

end

plot(x,y)

z=-1:.1:3;

u= z.^2 -3*z + 2;

plot(z,u)

My vector is correct, however i have no clue why my "for" loop wont show the correct graph.