How to create a 100x1 vector variable called b such that the vector b is equal to -5

Create a 100x1 vector variable called b such that the vector b is equal to -5

[Guillaume]

What does a vector of numbers being equal to a single number mean to you? The sum is equal to -5? Each element is equal to -5? Something else?

[Ibrahim Chalhoub]

How would I solve Ax=b? What would be the approach?

[Walter Roberson]

Use the \ operator. For example,

   A = rand(5,8);
   b = -5 * ones(5, 1);
   A\b

Answer 1

[Walter Roberson]

One approach:

b = zeros(100,1);
b(:) = -5;

Another approach:

b(1:100,1) = -5;

Another approach:

b = -5 * ones(100,1);