how to access values inside a matrix or array in a 'for' loop??
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suppose i hav two matrices or arrays named m and n.They have 4 values each like this.
m=56 67 89 103
n=45 78 92 71
now i need to plot 4 dots on an image using the above corresponding m and n values as (x,y) coordinates.So how to do it.i have written a code for this.But it is showing error.Any one plz hlp me fix this.
for i = 0:3
x=m.i;
y=n.i;
h=imread('C:\Users\Manoj\Desktop\sorry.jpg');
imshow(h)
hold on;
plot(x,y,'r.','MarkerSize',15)
end
I dont know how to access the values inside the m and n.So i doubt the error is in the steps m.i and n.i.
The output of the program must be an figure window with four dots plotted at the four (x,y) points.Where x,y must take values from m and n respectively.Help me plz..
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Accepted Answer
Andrei Bobrov
on 4 Feb 2012
h=imread('C:\Users\Manoj\Desktop\sorry.jpg');
imshow(h)
hold on;
plot(m,n,'r.','MarkerSize',15)
More Answers (1)
the cyclist
on 4 Feb 2012
This
m.i
is not how to access the i th element of m. Use
x=m(i)
y=n(i)
instead. Also, though, you shouldn't have to use a for loop at all. You can do this with a vector, and just do
plot(m,n,'r.','MarkerSize',15)
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