syms in MATLAB 2014a

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Matilde Sort
Matilde Sort 2015-10-24
编辑： Walter Roberson 2015-10-24
Hello, I am new to matlab, and have downloaded the 2014a-version. When i try to use the syms command I get a
Warning: Explicit solution could not be found.
> In solve at 179
My code looks like this (it should be right, it works for the entire rest of my modelling class..)
clc
clear all
close all
syms R C P r K bc eps dc bp dp
sol1 = solve([r*(1-R/K)*R-bc*C*R==0, ...
eps*bc*R*C - dc*C==0], [R C])
sol2=solve([r*(1-R/K)*R-bc*C*R==0, ...
eps*bc*R*C - bp*P*C==0, ...
eps*bp*C*P - dp*P==0],[R C P])
and I get
sol1 =
[ empty sym ]
Warning: Explicit solution could not be found.
> In solve at 179
sol2 =
[ empty sym ]
Can anyone see what mistake I have done, or guide me to wether I should just get the 2015 version instead?
Thank you very much in advance.
Matilde
  1 个评论
Star Strider
Star Strider 2015-10-24
You only included part of your code. You’re solving for three (of 10) variables, but how many equations do you have? If all your equations are linear, are they linearly independent?

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