In this code plot(t,AC(​3,:),'-r',​t,AC(2,:),​'-g',t,AC(​1,:),'-b')​; what is the value/essence of the '-r', '-g' and '-b'?

thank you very much

[Stephen23]

@Warda Panondi: have you read the plot documentation? It clearly explains the line specification options. Not only that, the documentation is easy to find: it is installed on your computer with MATLAB itself, so you just need to type

doc plot

or

help plot

The help is also online: this is the very first link provided by a major internet search engine:

https://www.mathworks.com/help/matlab/ref/plot.html

Reading the documentation yourself is a lot faster than posting questions on forums and then waiting for random strangers to go and read that documentation on your behalf.

Answer 1

[Star Strider]

The ‘-r’, ‘-g’, and ‘-b’ tell the plot function you are using to plot ‘t,AC(3,:)’ with a red solid line, ‘t,AC(2,:)’ with a green solid line, and ‘t,AC(1,:)’ with a blue solid line.

[Warda Panondi]

thank you very much sir Star Strider

[Star Strider]

As always, my pleasure.

Answer 2

[Geoff Hayes]

Warda - the strings are referring to the line style, marker, and colour (see 2D line plot spec). The 'r', 'g', and 'b' are referring to the colour of the plots: red, green, blue. The '-' indicates that a solid line should be drawn.

[Warda Panondi]

thank you very much sir Geoff Hayes. This will be very helpful.