MATLAB: Create a 2-column matrix, random set of weight

#create a 2-column matrixrandom set of weight

Hello here is one question i have. ( my english is bad. pardon me.)
"create a 2-column matrix kg-pound, where you convert a random set of weights in kilograms to pounds."
i've thought this would be correct.
>>kg=[1,2];
>>pound=kg*2.205;
>>[kg',pound,']
ans=
1.0000 30.4800
2.000 60.9600
  1. did i created 2-column matrix correctly? like this? [kg',pound']
  2. and should i create random set of weights with a+(b)rand(1,2) ?

Best Answer

To answer your questions:
  1. Did you create the column-matrix correctly? Sure. It works :). There are many ways to create matricies. The way you have done it is an acceptable way. A few other ways to make a vector:
kg = linspace(1,2,2)  % This makes a 1x2 matrix. 
% To convert it to a vector, you would still have to use the apostrophe (')

kg = 1 : 1 : 2;       % This makes a 1x2 matrix.
% To convert it to a vector, you would still have to use the apostrophe (')
kg = [1;2];           % This makes a 2x1 matrix. YOU DO NOT HAVE TO USE AN APOSTROPHE (')!
2. Should you create a random set of weights with a+(b)*rand(1,2)? Sure! Remember that you will have to declare your variables a and b but that will work. This will give you a 1x2 matrix again, if you wanted to start with a 2x1 matrix (so you don't have to transpose with ', you can just use rand(2,1)).
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