i want plot these three function but...

    xb = linspace(0,1);
    ub =- 1.654e-9*xb^24 - 3.277e-9*xb^23 - 8.551e-9*xb^22 - 1.629e-8*xb^21 - 4.667e-8*xb^20 - 8.351e-8*xb^19 - 2.739e-7*xb^18 - 4.503e-7*xb^17 - 1.774e-6*xb^16 - 2.997e-6*xb^15 - 1.047e-5*xb^14 - 3.428e-5*xb^13 + 0.0005502*xb^12 + 0.006917*xb^11 - 0.02256*xb^10 - 0.1796*xb^9 + 0.1328*xb^8 + 1.242*xb^7 - 0.2103*xb^6 - 3.288*xb^5 - 0.03086*xb^4 + 2.845*xb^3 + 0.1762*xb^2 + xb

h =1.084e-10*xb^24 + 2.913e-10*xb^23 + 5.82e-10*xb^22 + 1.702e-9*xb^21 + 3.313e-9*xb^20 + 1.067e-8*xb^19 + 2.383e-8*xb^18 + 6.368e-8*xb^17 + 4.368e-7*xb^16 - 4.523e-6*xb^15 - 4.935e-5*xb^14 + 3.007e-5*xb^13 + 0.00044*xb^12 + 0.001541*xb^11 + 0.007978*xb^10 - 0.01332*xb^9 - 0.1013*xb^8 + 0.03164*xb^7 + 0.3714*xb^6 - 0.01464*xb^5 - 0.3494*xb^4 + 0.06627*xb^3 - 0.4087*xb^2 + 0.4678*xb

p =- 2.291e-9*xb^24 - 4.735e-9*xb^23 - 1.5e-8*xb^22 - 2.869e-8*xb^21 - 1.056e-7*xb^20 - 1.678e-7*xb^19 - 7.968e-7*xb^18 - 5.587e-7*xb^17 - 6.405e-6*xb^16 + 1.66e-5*xb^15 - 8.231e-5*xb^14 + 0.001329*xb^13 - 0.01798*xb^12 - 0.1518*xb^11 + 0.1903*xb^10 + 1.909*xb^9 - 0.5747*xb^8 - 9.41*xb^7 + 0.2686*xb^6 + 22.1*xb^5 + 0.5245*xb^4 - 36.49*xb^3 + 0.5638*xb^2 + 47.27*xb
  figure
  plot(xb,ub,'-b',xb,h,'--r',xb, p,'-..k')

Answer 1

[Mischa Kim]

Ali, you need to use dot-operations...

 ub = - 1.654e-9*xb.^24 - 3.277e-9*xb.^23

since xb is a vector (notice the dots in front of the ^ ) and so on and so forth.

[MA]

it takes much time i need to do it quickly

[Mischa Kim]

You mean adding dots? You could use the find and replace functionality in MATLAB: CTRL+F.