What is the meaning of A (1: ,: ) in matlab

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alize beemiel 2022-2-4

评论： Image Analyst 2022-2-5

What is the meaning of A (1 ,: ,:) in matlab

the matrix A is 4x4

so What is the meaning A (1,: ,:) =4*A (2,: ,:)

and A (4,: ,:) =7*A (2,: ,:)

Davide Masiello 2022-2-4

If there are three indexes specified, it makes sense only if your matrix has three dimensions.

If it is actually 4x4, then A(1,:,:) yields the same result of A(1,:), i.e. extracting the first row of A.

So, the actual operation you are performing is A(1,:) = 4*A(2,:), which replaces the first row of A with its second row multiplied by 4.

Likewise, A(1,:) = 7*A(2,:) replaces the first row of A with its second row multiplied by 7.

alize beemiel 2022-2-5

thank you sir

for your help

Image Analyst 2022-2-5

@alize beemiel, spending two hours in this would greatly help you. A good investment of your time:

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