Plot points without connect it

Hi

I have matrix A(20,100) and I want to plot first column with respect to second column but I do not want to connect the points together. I mean I just want to put these point on the graph I used

plot(A(:,1),A(:,2))

but this command connect points together

How I can do that?

Regards

Answer 1

[Walter Roberson]

scatter(A(:,1),A(:,2))

[Ali Kareem]

Hi,

Thank you for your reply. Please how I can add legend for it. I already have another line on the graph and it has legend. Regards

[Walter Roberson]

scatter() creates a single graphics handle. You can go ahead and legend() passing in multiple legend entries. For example,

plot(A(:,1), fitted_values);
hold on
scatter(A(:,1), A(:,2));
legend({'Fitted', 'Raw Data'})

Note: if you want different legends for different points you will need to use multiple scatter() calls.

[Ali Kareem]

Thank you!

Answer 2

[Hazem]

plot(A(:,1),A(:,2), 'o')

or whatever marker you want to use

Answer 3

[Daniel Malo Osorio]

Follow-up question

How do I make it possible to plot with lines conecting my dots with the plot() function?

I have tried using the 'r.-' marker, but it ONLY plots the dots on the figure.

assuming x and y are my data vectors

plot(x,y,".-r")

[Hannes Morgenroth]

I always use hold and plot on top without a marker.

Example:

plot(x,y,".-r")
hold all; 
plot(x,y)