Connecting line between different points obtained from a for-loop

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AHN
AHN 2016-10-12
评论： DGM 2024-10-12
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 个评论
AHN
AHN 2016-10-13
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.

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回答（4 个）

Pritesh Shah
Pritesh Shah 2016-10-12
http://in.mathworks.com/matlabcentral/newsreader/view_thread/1588
This will work for your case !!
All the best !!
  1 个评论
AHN
AHN 2016-10-12
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

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Thorsten
Thorsten 2016-10-12
x = 1:20;
y = x+2;
plot(x,y,'*-')
  2 个评论
AHN
AHN 2016-10-13
Thank you for the reply. It is working on this code, but not working on my actual problem where I have used the for-loop with MCS. It says the matrix dimensions don't agree when I don't use for-loop.
Thorsten
Thorsten 2016-10-14
It would be helpful if you post a complete yet minimal example that does not work.

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Image Analyst
Image Analyst 2016-10-14
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;
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AHN
AHN 2016-11-29
Thank you. They are randomly generated integers; say between -2 and 2. Thank you very much for the help.
AHN
AHN 2016-11-29
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

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SAKSHAM
SAKSHAM 2024-10-12
clc;
clear all;
x1=input("Enter the value of x1= ");
y1=input("Enter the value of y1= ");
x2=input("Enter the value of x2= ");
y2=input("Enter the value of y2= ");
dx=x2-x1;
dy=y2-y1;
k=0;
p=2*dy-dx;
plot(x1,y1,'o');
hold on
while x1<x2
if p<0
x1=x1+1;
p=p+(2*dy);
else
x1=x1+1;
y1=y1+1;
p=p+ 2*(dy-dx);
end
plot(x1,y1,'o');
end
grid on
please let me know how to connect the points with a line in this code
  1 个评论
DGM
DGM 2024-10-12
Yet another reason to not write scripts that rely on ephemeral manual user input.
Are the initial points all scalar? If so, what's the point of the loop?

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