Matlab solver function variable question

BuckeyeBTH

I have to write a matlab code to solve for some numbers using given 1-D flow with heat added equations.
I need to solve for a variable M2, using the following relation
To2/To1=(1.480988*M2^4-7.40494*M2^2)/(M2^4+1.4285714*M2^2+.5102)
with To2 as a variable defined by
To2=(Qo*l)/(Cp)+To1 where Qo, Cp, l and To1 are knowns.
When i try to run the full program i get the following error:
??? Undefined function or method 'solve' for input arguments of type 'char'.

Error in ==> Hw73 at 20
solve('To2/To1=(1.480988*M2^4-7.40494*M2^2)/(M2^4+1.4285714*M2^2+.5102)','M2')

Here is my full code:
V1=100;
T1=293;
P1=101.3;
Qo=4*10^4;
g=1.4;
R=287.5;
Cp=1005;
M1=sqrt((V1)^2/(g*R*T1))
To1=T1*(1+((g-1)/2)*(M1)^2)
%s=star conditions
%T1/Ts=Tratio1
%P1/Ps=Pratio1
%Po1/Pos=Poratio1
Tratio1=((1+g)^2*M1^2)/(1+g*M1^2)^2
Pratio1=(1+g)/(1+g*M1^2)
Poratio1=((1+g)/(1+g*M1^2))*((2*(1+((g-1)/2)*(M1)^2))/(1+g))^(1.4/(1.4-1))
for l=0:1:12
To2=(Qo*l)/(Cp)+To1
solve('To2/To1=(1.480988*M2^4-7.40494*M2^2)/(M2^4+1.4285714*M2^2+.5102)','M2')
M2
%T2/Ts=Tratio2
%P2/Ps=Pratio2
%Po2/Pos=Poratio2
Tratio2=((1+g)^2*M2^2)/(1+g*M2^2)^2;
Pratio2=(1+g)/(1+g*M2^2);
Poratio2=((1+g)/(1+g*M2^2))*((2*(1+((g-1)/2)*(M2)^2))/(1+g))^(1.4/(1.4-1));
To=To2/To1;
T=Tratio2/Tratio1;
P=Pratio2/Pratio1;
Po=Poratio2/Poratio1;
end
HELP please? anything is appricated

shwaip

that means solve isn't in your path. what happens if you just type solve on the command prompt.

BuckeyeBTH

shwaip wrote:

that means solve isn't in your path. what happens if you just type solve on the command prompt.

The solve function requires the data from To2 defined earlier in the code. I
cant just write the solve equation into the command prompt or i get the same error.

shwaip

the error means matlab can't find the solve.m file needed.