plot(t,rx(:,6),'r:',t,y)

Question

U Chon Cheang 2022-10-21

编辑： Torsten 2022-10-22

Hi, I have two questions on this code. Could someone please help me figure it out what does it do?

What does the (:,6) do to "rx" in this code?

What is the 'r'? It looks like a name but it is not showing in the figure after the plot comes out.

Here is the line of the code: plot(t,rx(:,6),'r:',t,y)

The whole code is available on: https://au.mathworks.com/help/phased/ref/phased.timedelaylcmvbeamformer-system-object.html

Answer 1

Torsten 2022-10-21

编辑：Torsten 2022-10-22

What does the (:,6) do to "rx" in this code?

What is the 'r'? It looks like a name but it is not showing in the figure after the plot comes out.

It means: plot the 6th column of the array rx against t in red (r) with a dotted line (:).

But in such cases: The proof of the pudding is in the eating. Be courageous and test it out - the computer won't take damage.