When using linspace, matlab shows an error message= not enough input arguments.

for i=1:20

y=log(cond(vander(linspace(1,0,n))));

plot(n,y,'-');hold on

end

There is no line shown up.

Error message:

Not enough input arguments.

Error in linspace (line 19)
    n = floor(double(n));

Help! Thanks in advance!

Answer 1

[Star Strider]

I do not see where you defined ‘n’.

This works for me:

for n=1:20
    y=log(cond(vander(linspace(1,0,n))));
    plot(n,y,'pg');
    hold on
end

EDIT —

Also:

i = 1:20;
for n = i
    y(n)=log(cond(vander(linspace(1,0,n))));
end

figure(1)
plot(i,y,'-pg');
grid

[Carey Huang]

Thanks a lot!!

[Star Strider]

My pleasure!

Answer 2

[Walter Roberson]

You would get that argument if you had defined n as being an input argument to your function, but the place that called your function did not pass in a value in the position that corresponds to n.