plot(x,y(1,:) meaning

Hi,

I'm new matlab. I was wondering what the y(1,:) means?

I have ran this code: plot(x,y(1,:),'r-o',x,y(2,:),'g*','LineWidth',2) and can't make sense of the 1 and 2 in regards to the y coordinate.

Thanks

[Star Strider]

@Chole — Deleting the text of your Question is quite definitely NOT COOL!

[Stephen23]

Original question (from Google Cache):

I'm new matlab. I was wondering what the y(1,:) means?

I have ran this code: plot(x,y(1,:),'r-o',x,y(2,:),'g*','LineWidth',2) and can't make sense of the 1 and 2 in regards to the y coordinate.

Thanks

[Rena Berman]

(Answers Dev) Restored edit

Answer 1

[Star Strider]

It means the first row of the ‘y’ matrix. See Matrix Indexing for details.

EDIT —

To illustrate:

y = [1 2 3 4 5; 6 7 8 9 10]
FirstRow = y(1,:)
SecondRow = y(2,:)

produces:

y =
     1     2     3     4     5
     6     7     8     9    10

FirstRow =
     1     2     3     4     5

SecondRow =
     6     7     8     9    10