If statements comparing two character strings with multiple inputs

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Mikela Petersen on 16 Feb 2021
Commented: Mikela Petersen on 16 Feb 2021
I have to use two strings that include different characters such as str1= ["rho" , "mu" , "nu"] and str2= ["SI", "BG"] and go from there. I need to use IF statements to get the correct values if i called the function from the command line: h20_props(50,"nu","SI) but when I do this, nothing happens. I don't even get an error. it's just nothing. Here's what I have:
function h20_props(T, str1, str2)
str1 = ["rho","mu","nu","pv"];
str2 = ["SI", "BG"];
if strcmpi(str1,"mu")
if strcmpi(str2, "SI")
dv = h20_mu_SI(T);
fprintf('dv_si = %g\n',dv);
else
dv = h20_mu_BG(T);
fprintf('dv_bg = %g\n',dv);
end
elseif strcmpi(str1,"nu")
if strcmpi(str2,"SI")
kv = h20_nu_SI(T);
fprintf('kv_si=%g\n',kv);
else
kv = h20_nu_BG(T);
fprintf('kv_bg=%g\n',kv);
end
elseif strcmpi(str1, "pv")
if strcmpi(str2, "SI")
vp = h20_pv_SI(T);
fprintf('vp_si=%g\n',vp);
else
vp = h20_pv_BG(T);
fprintf('vp_bg=%g\n',pv);
end
end
end
per isakson on 16 Feb 2021
You overwrite the input arguments with the statements
str1 = ["rho","mu","nu","pv"];
str2 = ["SI", "BG"];
Comment out these two statements.

Fangjun Jiang on 16 Feb 2021
variable 'str1' and 'str2' are supposed to take values from function input arguments when you call h20_props(50,"nu","SI"). But inside your fuction, the values were over-written in the first two lines of code. What are you trying to do?
I believe it should work if you comment out those two lines.
Mikela Petersen on 16 Feb 2021
this was exactly what i was doing wrong. I commented the two string lines out and now everything works! Thank you!