intro to programing MATLAB, Matrix

Hello everyone I just finished a assignment and was wondering if there was a easier answer then i got the question was

Given matrix A assign the second column to a variable v. after change elements of last row to 0

A=[1:5; 6:10; 11:15; 16:20];

i used

v = A(1:4,2)

A= [1:5; 6:10; 11:15; 0,0,0,0,0]]

the answer is correct but how could i have made it simpler? Recomendations?

[Anand Shanker Trivedi]

can you please tell me how u got answer for this assisngment

i am stuck in this since 2 days but could not find answer

what should be the value of v ?

[Rik]

@Anand, did you see my answer below? It contains a hint about how you can do this.

Answer 1

[Rik]

You can use the colon to index all values in a dimension:

IMG(2,2,:)=[100 255 255];%assign RGB values to a pixel

You can also use the end keyword to index into the last element of a dimension:

Blue=IMG(:,:,end);

I'm not giving more specific instructions, because that would encourage you to cheat.

[chad asdal]

Thanks I will have to fiddle with that I was trying to use END but could not get it to work

I will go back and review the material and see if i can combine you example with information with it.

Answer 2

[urvashi sharma]

[Rik]

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