how to access values inside a matrix or array in a 'for' loop??
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
Manoj Murali
am 4 Feb. 2012
Bearbeitet: Jan
am 30 Sep. 2013
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..
0 Kommentare
Akzeptierte Antwort
Andrei Bobrov
am 4 Feb. 2012
h=imread('C:\Users\Manoj\Desktop\sorry.jpg');
imshow(h)
hold on;
plot(m,n,'r.','MarkerSize',15)
Weitere Antworten (1)
the cyclist
am 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)
3 Kommentare
Siehe auch
Kategorien
Mehr zu Characters and Strings finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!