change in loop calculation and manual calculation

hi

i want to calculate the following expression for below given values. when these values are putted in the loop, the response i get is slight different when compare it with manual calculation

angle = 0.5421    0.7166    0.8906    1.0647    1.2385

m=0

   v1=(4/pi)*(vdc(1,1)*cos(angle(n,1))+vdc(1,2)*cos(angle(n,2))+vdc(1,3)*cos(angle(n,3))+vdc(1,4)*cos(angle(n,4))+vdc(1,5)*cos(angle(n,5))-m*5)

v1 = 97.1028

 v1=(4/pi)*(vdc(1,1)*cos( 0.5421)+vdc(1,2)*cos(0.7166 )+vdc(1,3)*cos(  0.8906  )+vdc(1,4)*cos(   1.0647)+vdc(1,5)*cos(     1.2385 )-0*5)

v1 = 97.1035

if any one knows why this happen? kindly help me

Answer 1

[James Tursa]

I think you will find that angle has more significant digits than you are printing. E.g., do this

format long g
angle

And you will likely see they are different than the truncated numbers you entered manually.