Why won't MATLAB see the two strings that I am comparing as equal?

I am doing this as an assignment for my highschool MATLAB course. I cannot understand why MATLAB does not see my volume ('v') as equal to one of the volumes in my if structure. I even changed one of the if statements to use strcmp() instead of isequal(), to no avail. I run the script and enter the information, and no matter what I enter for the volume it outputs my 'else' code and gives me this error :

Choose a material(pine, oak, maple, yew, willow, mahogany, cypress, birch, or walnut) oak

Mass units to be used (kg, g, mg): kg

Mass units to be used (m^3, cm^3,mm^3, L, or mL): L

Inputted volume units are invalid.

Undefined function or variable 'p2'.

(I hope I entered the code correctly)

if true
  % code
endmat = input('Choose a material(pine, oak, maple, yew, willow, mahogany, cypress, birch, or walnut)    ','s');
% 
% 
% m = input('Mass units to be used (kg, g, mg):       ','s');
% v = input('Mass units to be used (m^3, cm^3,mm^3, L, or mL):        ','s');
% 
% v = lower(v);
%
% % Process
%   % densities in kg/m^3
% switch mat
%   case 'pine'
%     p = 500;
%   case 'oak'
%     p = 600;
%   case 'maple'
%     p = 750;
%   case 'yew'
%     p = 670;
%   case 'willow'
%     p = 450;
%   case 'mahogany'
%     p = 850;
%   case 'cypress'
%     p = 510;
%   case 'birch'
%     p = 670;
%   case 'walnut'
%     p = 700;
%   otherwise
%     disp('Either the material you entered is not in the database, or your query is misspelled.')
% end
% 
% if isequal(m,'kg')
%   p1 = p;
% elseif isequal(m,'g')
%   p1 = p*10^3;
% elseif isequal(m,'mg')
%   p1 = p*10^6;
% else
%   disp('Inputted mass units are invalid.')
% end
% 
% 
% if strcmp(m,'m^3')
%     p2 = p1;
% elseif isequal(m,'cm^3')
%     p2 = p1*100^3;
% elseif isequal(m,'mm^3')
%     p2 = p1*1000^3;
% elseif isequal(m,'l')
%     p2 = p1*1000;
% elseif isequal(m,'ml')
%     p2 = p1*10^6;
% else
%     disp('Inputted volume units are invalid.')
% end
% 
% 
% % Output
%   disp(sprintf('The density of %s is %d %s/%s.',mat,p2,m,v))

Answer 1

[sixwwwwww]

replace

m with v

in your last if-else structure as follow:

if isequal(v,'m^3')
    p2 = p1;
elseif isequal(v,'cm^3')
    p2 = p1*100^3;
elseif isequal(v,'mm^3')
    p2 = p1*1000^3;
elseif isequal(v,'l')
    p2 = p1*1000;
elseif isequal(v,'ml')
    p2 = p1*10^6;
else
    disp('Input volume units are invalid.')
end

[Zach]

Well aren't I observant... XP Thanks for the help! I guess sometimes you just need an outside set of eyes!

[sixwwwwww]

hahhahaha. sometimes it happens to everyone especially in programming. so don't worry at all and keep programming