# Scatter Plot only Non-Zero Set of Points

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CMatlabWold on 5 May 2020
Commented: CMatlabWold on 6 May 2020
Hi,
I suppose... Let's say, once you make two tables of values and you decide create a scatter plot, where the row values of one table is plotted against the row values the other... how can you use scatter to plot only the non-zero points in the tables?
For instance,
x1 = tt5{:,6}
y1 = ss5{:,6}
scatter(x1,y1,'b')
hold on
where
ss5 column 6:
0
1
0
0
1
0
0
0
tt5 column 6:
0
7
6
5
18
6
4
5
So, I would only want to plot (7,1) and (18,1)
Rik on 5 May 2020
Either will do ;)
It is just a bit frustrating to apply formatting to your question, and then having to do it again because you removed everything including the formatting. The edit controls are right there when you edit you posts, please use them.
CMatlabWold on 5 May 2020
lol I get it

Sindar on 5 May 2020
Here's how to do this with a small example script:
% create a 5x2 array of random integers 0-5 for both x and y
x = randi([0 5],5,2);
y = randi([0 5],5,2);
% identify indices where both x and y are not zero
idx = (x ~= 0) & (y ~= 0);
% plot only these
scatter(x(idx),y(idx))
If this doesn't work with your code, please work to simplify it as Rik suggests
Sindar on 5 May 2020
Edited: Sindar on 5 May 2020
look at the plot, those are 1's. It will look better if you change the ylim:
% get current limits
yl=ylim();
% set new bottom limit to 0
ylim([0 yl(2)])
CMatlabWold on 6 May 2020
You are right. Thank you!

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