Plotting a row from a matrix

Hello,

I'm new to matlab. So forgive me if this is a stupid question. I'm analyzing some MATLAB code, and there is a line which plots the 1000th row of a matrix. However I don't understand where the y-values come from. Where do the y-valus come from?

Here is a link to the csv file of INT_I:

INT_I.zip

The code is:

figure('Name','INT 1000','NumberTitle','off'); hold on;
set(gca,'FontSize',30)
plot(INT_I(1000,:))
legend('1','2','3')

What I get is this:

[Stephen23]

"Where do the y-valus come from"

Your data.

Where do the X values come from? Read the plot help to find out.

Answer 1

[Michael Madelaire]

INT_I(1000,:)

That is your y-values

plot(INT_I(1000,:))

Is equivalent to

plot(1:length(INT_I(1000,:)), INT_I(1000,:))

Due tell if it is not clear

[Stephen23]

Which is also exactly what the plot documentation states:

"plot(Y) creates a 2-D line plot of the data in Y versus the index of each value."

"If Y is a vector, then the x-axis scale ranges from 1 to length(Y)."

[BubbleFlow]

I understand now. Thank you.