Not enough input arguments error

function [tVec,xVec]=fxNthOrderPolysignal(domainVec, rootsVec)

% create time vector
tVec = linspace(domainVec(1),domainVec(2),100);

%obtain polynomial coefficients p from roots
p=poly(rootsVec);

% initialize to empty vector
xVec=[];

for c=1:length(tVec)
    %val=f(tVec(c));
    t = tVec(c);
    val = polyval(p,t)
    % if functional value is not numerix
    % convert to numeric
    if isnumeric(val)==false
        val=eval(val);
    end
    % add in Xvec vector
    xVec=[xVec val];
end

% plot the graph
plot(tVec,xVec);
xlabel('t values');
ylabel('x(t) values');
title('x(t) vs t');
grid on

Answer 1

[Image Analyst]

How are you calling it? For example are you doing this:

[tVec, xVec] = fxNthOrderPolysignal(1:10, [3,4,5,6]);

or some other way?

You're not just pushing the green run triangle are you? Because that will not send in input arguments to the function.

Answer 2

[Chunru]

% Call the function
[tVec,xVec]=fxNthOrderPolysignal([0 10], [1 2 3 2 1]);

% Define the function in the same file or separate file
function [tVec,xVec]=fxNthOrderPolysignal(domainVec, rootsVec)
% create time vector
tVec = linspace(domainVec(1),domainVec(2),100);
%obtain polynomial coefficients p from roots
p=poly(rootsVec);
% initialize to empty vector
xVec=[];
for c=1:length(tVec)
    %val=f(tVec(c));
    t = tVec(c);
    val = polyval(p,t);
    % if functional value is not numerix
    % convert to numeric
    if isnumeric(val)==false
        val=eval(val);
    end
    % add in Xvec vector
    xVec=[xVec val];
end
% plot the graph
plot(tVec,xVec);
xlabel('t values');
ylabel('x(t) values');
title('x(t) vs t');
grid on
end