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If loop not executed in a function

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Shuo Zhang
Shuo Zhang on 12 Jul 2019
Commented: KSSV on 12 Jul 2019
Hi everyone,
I'm trying to build a simple function that gives values to parameters based on input. Attached are my programs
In the main program, if I input ship_type='Passenger ship', then everything worked fine
But when I change it to ship_type='cargo ship' or 'container ship', I get the error message 'Matrix dimensions must agree'
So I'm confused.
What's wrong with my program?
Btw, I'm using version 2017a

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Accepted Answer

KSSV
KSSV on 12 Jul 2019
Edited: KSSV on 12 Jul 2019
Use strcmp instead of equating.
function[A0,A1,A2,A3,A4,A5]=Trial_types(ship_type,x)
if strcmp(ship_type,'Passenger ship')
A0=0;
A1=1+x;
A2=2*x;
A3=3/x;
A4=4-x;
A5=x^2;
elseif strcmp(ship_type,'cargo ship')
A0=10;
A1=10+x;
A2=20*x;
A3=30/x;
A4=40-x;
A5=(x-10)^2;
elseif strcmp(ship_type,'container ship')
A0=20;
A1=20+x;
A2=30*x;
A3=40/x;
A4=50-x;
A5=(x-20)^2;
else
end
end

  2 Comments

Shuo Zhang
Shuo Zhang on 12 Jul 2019
Thank you very much for your help! It worked perfect!
KSSV
KSSV on 12 Jul 2019
You can also use switch. Read about it.

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