Few questions in matlab assignment

I am sorry to bother that I am a rookie in using matlab. I can't even run the function. What should be fixed? Please give a help.

Write a MATLAB function named “cone” to accept inputs r and h, and return output V, where r, h, and V are respectively the radius, height, and volume of a cone.

function[V] = cone ( r, h )
cone=(1/3)*h*pi*(r^2);
end.

Edit by Rik (moved from 'answer'):

The second question is:

Write a MATLABscriptto generate data and plot the function y = 1/xas shown below. The plot is in greencolourwith diamondmarkers.

but i can only get this graph by this script:

x=linspace(-10,10,20)
y=1./x;
plot(x,y,'gd')
ylim([-1 1])

Answer 1

[Rik]

If you paste your code in the Matlab editor you will see two mlint warnings and one error.

The first warning is that V is not defined in your function, the second warning is that the variable cone is unused. You should not use the name of the function as a variable, so if you replace cone by V that should solve your issue.

The error can be solved by removing the point after end.

function V = cone ( r, h )
V=(1/3)*h*pi*(r^2);
end.

As for your second question: your code should result in the upper image. The file name suggests that you are using Octave instead of Matlab. Because this is a Matlab forum, usually only questions will be answered where the issue can be reproduced in Matlab.