Anyway to plot one point

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nas illmatic
nas illmatic on 17 Mar 2019
Answered: Nicholas Ayres on 20 Aug 2020
Is there anyway in Matlab to plot one point?
For example: plot(1,2) returns simply a blank plot
  1 Comment
per isakson
per isakson on 17 Mar 2019
Try
plot(1,2,'d')

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Answers (2)

Nicholas Ayres
Nicholas Ayres on 20 Aug 2020
I'm a bit late to the party, BUT...
The issue this person is having is that the default plot type is just a "line" which connects points together. If there is only one point, it has nothing to connect it to. You need to add a marker.
Using any of the following characters after your x,y coordinates will produce these markers on your plot:
'o','+','*','.','x','s','d','^','v','>','<','p',h'
E.g.
plot(1,2,'.')
will just plot a dot at (1,2). You can combine this with line styles and colors to get a lot of variety in your plots. (my favourite is '.-', which puts dots at all the points and connects them together)
Specifically the section on "LineSpec" if you're short on time. It's worth the read as this provides a very simple way to pretty up your graphs a bit (and explains what the character inputs I listed above represent. This is the most common plotting method you're going to use and the syntax for the "LineSpec" works with a myraid of other plotting types, so it's worthwhile to know what's going on.

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