Practice Colon Operator (2.5.4) - Tutorial lessons - Part B

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6 sample questions

Question 1.
Create a vector from 0 to 10 with a step of 1 using the colon operator.
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Remember the format is `start:step:end`.
Question 2.
What would A(1:2, :) return if A is a 3x3 matrix?
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Think about row selection with the colon operator.
3Question 3.
What is the purpose of the colon operator in MATLAB?
- Creating single elements
- Generating vectors
- Only for matrix multiplication
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Think of how you might want to list numbers.
4Question 4.
True or False: The command A(:, 3) = [] removes the third row.
- True
- False
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Remember the syntax of indexing.
Question 5.
Create a matrix of size 5x5, filled with the numbers 1 to 25. Then, using the colon operator, extract the submatrix containing rows 3 to 5 and columns 4 to 5.
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Think about how to reshape a vector into a matrix before extracting.
Question 6.
Suppose you have a matrix M. Using the colon operator, write a command to retrieve the last two rows and all columns of M and set them to zero.
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Think about how 'end' can help you find the last rows.

5 more questions in this section. Enroll free to practise them all.