# Connecting line between different points obtained from a for-loop

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AHN on 12 Oct 2016
Commented: AHN on 29 Nov 2016
Hello, I have obtained a plot of set of points from a for-loop as shown above. I simply want to add a line connecting these points. The function plot(x,y,'-*') does not work since these points are from different iterations. Please can someone help. Thanks.
##### 2 CommentsShowHide 1 older comment
AHN on 13 Oct 2016
Thank you for the reply. It's still not working on my problem, but good to know various approaches to the pseudo-code. I will keep trying, Thanks.

Pritesh Shah on 12 Oct 2016
This will work for your case !!
All the best !!
AHN on 12 Oct 2016
Thank you for the reply. I still cannot get a connecting line through the points. Here's my pseudo-code. Thanks.
for x=1:1:20;
y=x+2
hold all
plot(x,y,'*')
end

Thorsten on 12 Oct 2016
x = 1:20;
y = x+2;
plot(x,y,'*-')
##### 2 CommentsShowHide 1 older comment
Thorsten on 14 Oct 2016
It would be helpful if you post a complete yet minimal example that does not work.

Image Analyst on 14 Oct 2016
These work:
% Plot all at once:
subplot(2, 1, 1);
x = 1 : 20;
y = zeros(1, length(x));
for i = 1 : length(x)
y(i) = x(i) + 2;
end
plot(x,y,'b-*')
grid on;
% Plot a point at a time:
subplot(2, 1, 2);
grid on;
ylim([0, 22]);
xlim([0, 20]);
hold on;
x = 1 : 20;
y = zeros(1, length(x));
for i = 1 : length(x)
y(i) = x(i) + 2;
plot(x(1:i),y(1:i),'b-*')
drawnow;
pause(0.3);
end
Of course you could also vectorize and do away with the for loops
x = 1 : 20;
y = x + 2;
plot(x,y,'b-*')
grid on;
AHN on 29 Nov 2016
z1 =
0.6510
0.6995
-0.2816
-0.1782
1.7098
0.1839
1.0352
-0.5937
0.3116
0.2233
z2 =
1.7924
-1.3664
0.0013
0.0541
-1.3397
1.3086
1.1972
-0.1535
0.7780
-1.0430