# Not enough input arguments

4 views (last 30 days)
Ngoc on 31 May 2024
Commented: Ngoc on 1 Jun 2024
Hi i'm new to MatLab. Why I can't get the values from matrix x in function MyInput() to use in another function?
function Calculate(x)
MyInput();
y = zeros(1,6);
for j=2:6
y(1,j) = x(1,j)^j;
j=j+1;
end
end
function x = MyInput()
x = zeros(1,6);
x(1,1) = 2;
for i=2:6
x(1,i)=x(1,i-1)+1;
i=i+1;
end
end
The command window says : ' Not enough input arguments.'. It seems to give this error for line 5 but I'm not sure why.
Thanks.

Stephen23 on 31 May 2024
Edited: Stephen23 on 31 May 2024
"Why I can't get the values from matrix x in function MyInput() to use in another function?"
Basically because you did not call MyInput with an output argument.
Note that it makes little sense to define Calculate with an input argument... and then completely ignore that input argument by redefining it on the first line of code. Much better to use that input argument.
Note that you should not increment the index i=i+1 and j=j+1 at the end of the for loops: the for operator will simply redefine those values at the start of each iteration, so those lines serve absolutely no purpose. Get rid of them.
vec = MyInput()
vec = 1x6
2 3 4 5 6 7
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>
out = Calculate(vec)
out = 1x6
0 9 64 625 7776 117649
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>
function y = Calculate(x)
y = zeros(1,6);
for j=2:6
y(1,j) = x(1,j)^j;
end
end
function x = MyInput()
x = zeros(1,6);
x(1,1) = 2;
for i=2:6
x(1,i)=x(1,i-1)+1;
end
end
Stephen23 on 31 May 2024
Edited: Stephen23 on 31 May 2024
A simpler MATLAB approach:
vec = 2:7
vec = 1x6
2 3 4 5 6 7
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>
out = [0,vec(2:end).^(2:6)]
out = 1x6
0 9 64 625 7776 117649
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>
Ngoc on 1 Jun 2024
Thank you so much!!!ðŸ˜ŠðŸ˜ŠðŸ˜Š

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