Keep getting Matrix dimensions must agree warning

Question

0 个投票

I am attempting to plot the Gas Turbine efficiency as a function of the temperature ratio:

Tr=1:10<3;
n=1-1/Tr;
figure
plot(Tr,n)

When attempting to plot i get the following error:

Error in ==> test at 5
n=1.-1/Tr;
??? Error using ==> mrdivide
Matrix dimensions must agree.
 Any help would be appreciated, thanks in advance.

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Answer 1

TastyPastry 2015-11-5

0 个投票

You need to use element by element division, which is "./".

Answer 2

Star Strider 2015-11-5

0 个投票

I do not know what you intend with this assignment:

Tr=1:10<3;

since it creates this logical array:

Tr =
     1     1     0     0     0     0     0     0     0     0

Which is likely not what you want, because it creates with this assignment:

n=1-1./Tr;

this result for ‘n’:

n =
     0     0    -Inf     -Inf     -Inf     -Inf     -Inf     -Inf     -Inf     -Inf