how do I substitute the values inside the vector?

If you have a vector x = [1.92 , 0.05 , -2.43 , -0.02, 0.09, 0.85 , 0.06, -0.05, 0.3214, 25, 1 ,5 ,10 , 0.0125 , 100 ] do the following:

a. Replace any value between 1 and 4 with zero

b. Multiply any negative value with -1

c. Add 100 for the number that larger than or equal 5

d. Subtract 50 for the number that are smaller than 5

[Torsten]

Look up "logical indexing".

[Jan]

@Aymen: This is a homework question. Then please post, what you have tried so far and ask a specific question. The forum will assist you, but we will not solve your homework.

Answer 1

[Sarthak]

Hi,

You can look up to “Logical Indexing” section in the following documentation:

Matrix Indexing in MATLAB - MATLAB & Simulink (mathworks.com)

Try applying the same concept and try the questions then.