MATLAB: Why do we need to normalize data in matlab? what is the purpose
normalization
I need a short but meaningful answer.
Thanks
Best Answer
Normalization of an array is applied, if data in a specific range is required.
If you e.g. want to create a gray scale image with the maximum range, shifting and scaling the data to the range [0.0, 1.0] is used. Sounds can be normalized to [-1.0, 1.0], to give the full range. If you normlize the X values to be centered around 0 and have a standard deviation of 1.0, the resulting linear equations for a polinomial fit (seepolyfit) are stable (the matrix is not ill-conditioned).
You see, a short but meaningful answer depends on the topic you are working in. The more specific the question, the crispier is the answer.
I’m guessing here, but it seems that you may be doing a Cramer’s rule solution to a linear system (or less likely, a linear regression). MATLAB makes this relatively straightforward, so there is no need for you to specifically calculate the determinant.
See specifically the documentation formldivide andmrdivide for details. There are other functions if your matrices are sparse or have other special conditions you need to consider.
Best Answer