V_n=R*T/P

Why does this error message keep coming up when I enter this equation in the command window? >> V_n=R*T/P; %find values of V_n R=0.08602; P=1.01; T=285;2;325; Undefined function or variable 'R'.

Answer 1

[Kodavati Mahendra]

Yo something is wrong with this line.

   T=285;2;325; or   T=285:2:325;

The following works for me, Code 1:

R=0.08602;
P=1.01;
T=285;2;325
V_n=R*T/P

answer V_n = 24.2730;

Code2:

R=0.08602;
P=1.01;
T=285:2:325
V_n=R*T./P

answer: V_n is an array of length 21.

Code3:

R=0.08602;
P=1.01;
T=[285;2;325];
V_n=R*T./P

answer: V_n =

   24.2730
    0.1703
   27.6797

What do you want to do exactly?