Why am I getting "not enough input arguments?"

I have a main script and it is using a function like so:

shape=input('What was the shape of the final graph? Enter either square, circle, figure_eight: ')
Final_Data=Save(shape);

FUNCTION FILE:

function [T] = Save(shape)
%SAVE Summary of this function goes here
%   Detailed explanation goes here
if shape==square
    xT=[xQ1,xQ2,xQ3,xQ4]';
    yT=[yQ1,yQ2,yQ3,yQ4]';
    T=[xT,yT];
    fid=fopen('Final2.dat','w');
    save Final2.dat T -ascii -single
    st=fclose(fid);
elseif shape==circle
    xT=[xQ1,xQ2,xQ3,xQ4]';
    yT=[yQ1,yQ2,yQ3,yQ4]';
    T=[xT,yT];
    fid=fopen('Final2.dat','w');
    save Final2.dat T -ascii -single
    st=fclose(fid);
else shape=figure_eight
    xT=[xQ1,xQ2]';
    yT=[yQ1,yQ2]';
    T=[xT,yT];
    fid = fopen('Final2.dat','w');
    save Final2.dat T -ascii -single
    st=fclose(fid);
end

end

Every time I run it I keep getting the error "not enough input arguments." Please help.

Answer 1

[Star Strider]

You’re comparing strings, so you have to define your matching strings as strings. Also, use strcmp or strcmpi instead of the logical double equal (==). I haven’t looked at the files it created (I’ll leave the QA/QC to you), but this code runs:

function [T] = Save(shape)
%SAVE Summary of this function goes here
%   Detailed explanation goes here
Q1 = strcmp(shape,'square')
if strcmpi(shape,'square')
    xT=[xQ1,xQ2,xQ3,xQ4]';
    yT=[yQ1,yQ2,yQ3,yQ4]';
    T=[xT,yT];
    fid=fopen('Final2.dat','w');
    save Final2.dat T -ascii -single
    st=fclose(fid);
elseif strcmpi(shape,'circle')
    xT=[xQ1,xQ2,xQ3,xQ4]';
    yT=[yQ1,yQ2,yQ3,yQ4]';
    T=[xT,yT];
    fid=fopen('Final2.dat','w');
    save Final2.dat T -ascii -single
    st=fclose(fid);
else strcmpi(shape,'figure_eight')
    xT=[xQ1,xQ2]';
    yT=[yQ1,yQ2]';
    T=[xT,yT];
    fid = fopen('Final2.dat','w');
    save Final2.dat T -ascii -single
    st=fclose(fid);
end

end

[GGT]

Thanks for the answer. It makes sense but I keep getting that same error. Ill accept the answer though. I have a feeling something else is wrong with my data.

[Star Strider]

My pleasure.

I didn’t get that error when I ran it (with my changes) for all options of 'shape'. It ran without errors. (It did not create your ‘Final2.dat’ files, so you may want to save it as a .mat file, that do not require fopen or fclose.)

Run this from the Command Window:

which Save -all

It should only return your function. If it returns something else as well, that means you have ‘overshadowed’ (or ‘shadowed’) your ‘Save’ function. That may be the reason MATLAB is throwing the error.

[Akhil George Thomas]

I think I have overshadowed my 'save' function . How do I fix it?

[Star Strider]

Find it and rename it to something else that is meaningful in the context of your code.

The:

which save -all

command will find it for you if it is a function.

If it is a variable, use the Find function in the MATLAB Editor toolbar (in the NAVIGATE section) to find it.