polyfit line coordinates - Matlab
I calculated a line based on two points, how can I store all the line coordinates (x and y) in two separated arrays?
Script:
x1=50;
x2=130;
y1=30;
y2=200;
coefficients = polyfit([x1, x2], [y1, y2], 1);
a = coefficients (1);
b = coefficients (2);
plot([x1, x2], [y1, y2], 'b','LineWidth',2)
matlab
asked Nov 14 '18 at 22:12
janejane
697
add a comment |
I calculated a line based on two points, how can I store all the line coordinates (x and y) in two separated arrays?
Script:
x1=50;
x2=130;
y1=30;
y2=200;
coefficients = polyfit([x1, x2], [y1, y2], 1);
a = coefficients (1);
b = coefficients (2);
plot([x1, x2], [y1, y2], 'b','LineWidth',2)
matlab
asked Nov 14 '18 at 22:12
janejane
697
add a comment |
I calculated a line based on two points, how can I store all the line coordinates (x and y) in two separated arrays?
Script:
x1=50;
x2=130;
y1=30;
y2=200;
coefficients = polyfit([x1, x2], [y1, y2], 1);
a = coefficients (1);
b = coefficients (2);
plot([x1, x2], [y1, y2], 'b','LineWidth',2)
matlab
asked Nov 14 '18 at 22:12
janejane
697
I calculated a line based on two points, how can I store all the line coordinates (x and y) in two separated arrays?
Script:
x1=50;
x2=130;
y1=30;
y2=200;
coefficients = polyfit([x1, x2], [y1, y2], 1);
a = coefficients (1);
b = coefficients (2);
plot([x1, x2], [y1, y2], 'b','LineWidth',2)
matlab
matlab
asked Nov 14 '18 at 22:12
janejane
697
asked Nov 14 '18 at 22:12
janejane
697
asked Nov 14 '18 at 22:12
janejane
697
asked Nov 14 '18 at 22:12
janejane
697
asked Nov 14 '18 at 22:12
janejane
697
697
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
Read about polyval. You ca generate the points as shown in the below code:
x1=50;
x2=130;
y1=30;
y2=200;
p = polyfit([x1, x2], [y1, y2], 1);
N = 100 ; % can be changed
xi = linspace(x1,x2,N) ;
yi = polyval(p,xi) ;
plot(xi,yi,'.-r')
Alternatively you can also use slope/ intercept obtained from polyfit to get the coordinates.
x1=50;
x2=130;
y1=30;
y2=200;
p = polyfit([x1, x2], [y1, y2], 1);
N = 100 ; % can be changed
xi = linspace(x1,x2,N) ;
yi = p(2)+p(1)*xi ;
plot(xi,yi,'.-r')
answered Nov 15 '18 at 11:48
Siva Srinivas KolukulaSiva Srinivas Kolukula
9851512
add a comment |
If you have two points, (x1, y1) and (x2, y2), you can directly obtain the line coordinates by slicing:
n = 100;
xx=x1:(x2-x1)/n:x2
yy=y1:(y2-y1)/n:y2
Where n specifies how many points of coordinate. xx and yy are two arrays storing and coordinates on the line.
You can also plot the line by
plot(xx,yy)
answered Nov 15 '18 at 3:00
Banghua ZhaoBanghua Zhao
1,2851720
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Read about polyval. You ca generate the points as shown in the below code:
x1=50;
x2=130;
y1=30;
y2=200;
p = polyfit([x1, x2], [y1, y2], 1);
N = 100 ; % can be changed
xi = linspace(x1,x2,N) ;
yi = polyval(p,xi) ;
plot(xi,yi,'.-r')
Alternatively you can also use slope/ intercept obtained from polyfit to get the coordinates.
x1=50;
x2=130;
y1=30;
y2=200;
p = polyfit([x1, x2], [y1, y2], 1);
N = 100 ; % can be changed
xi = linspace(x1,x2,N) ;
yi = p(2)+p(1)*xi ;
plot(xi,yi,'.-r')
answered Nov 15 '18 at 11:48
Siva Srinivas KolukulaSiva Srinivas Kolukula
9851512
add a comment |
Read about polyval. You ca generate the points as shown in the below code:
x1=50;
x2=130;
y1=30;
y2=200;
p = polyfit([x1, x2], [y1, y2], 1);
N = 100 ; % can be changed
xi = linspace(x1,x2,N) ;
yi = polyval(p,xi) ;
plot(xi,yi,'.-r')
Alternatively you can also use slope/ intercept obtained from polyfit to get the coordinates.
x1=50;
x2=130;
y1=30;
y2=200;
p = polyfit([x1, x2], [y1, y2], 1);
N = 100 ; % can be changed
xi = linspace(x1,x2,N) ;
yi = p(2)+p(1)*xi ;
plot(xi,yi,'.-r')
answered Nov 15 '18 at 11:48
Siva Srinivas KolukulaSiva Srinivas Kolukula
9851512
add a comment |
Read about polyval. You ca generate the points as shown in the below code:
x1=50;
x2=130;
y1=30;
y2=200;
p = polyfit([x1, x2], [y1, y2], 1);
N = 100 ; % can be changed
xi = linspace(x1,x2,N) ;
yi = polyval(p,xi) ;
plot(xi,yi,'.-r')
Alternatively you can also use slope/ intercept obtained from polyfit to get the coordinates.
x1=50;
x2=130;
y1=30;
y2=200;
p = polyfit([x1, x2], [y1, y2], 1);
N = 100 ; % can be changed
xi = linspace(x1,x2,N) ;
yi = p(2)+p(1)*xi ;
plot(xi,yi,'.-r')
answered Nov 15 '18 at 11:48
Siva Srinivas KolukulaSiva Srinivas Kolukula
9851512
Read about polyval. You ca generate the points as shown in the below code:
x1=50;
x2=130;
y1=30;
y2=200;
p = polyfit([x1, x2], [y1, y2], 1);
N = 100 ; % can be changed
xi = linspace(x1,x2,N) ;
yi = polyval(p,xi) ;
plot(xi,yi,'.-r')
Alternatively you can also use slope/ intercept obtained from polyfit to get the coordinates.
x1=50;
x2=130;
y1=30;
y2=200;
p = polyfit([x1, x2], [y1, y2], 1);
N = 100 ; % can be changed
xi = linspace(x1,x2,N) ;
yi = p(2)+p(1)*xi ;
plot(xi,yi,'.-r')
answered Nov 15 '18 at 11:48
Siva Srinivas KolukulaSiva Srinivas Kolukula
9851512
answered Nov 15 '18 at 11:48
Siva Srinivas KolukulaSiva Srinivas Kolukula
9851512
answered Nov 15 '18 at 11:48
Siva Srinivas KolukulaSiva Srinivas Kolukula
9851512
answered Nov 15 '18 at 11:48
Siva Srinivas KolukulaSiva Srinivas Kolukula
9851512
9851512
add a comment |
add a comment |
If you have two points, (x1, y1) and (x2, y2), you can directly obtain the line coordinates by slicing:
n = 100;
xx=x1:(x2-x1)/n:x2
yy=y1:(y2-y1)/n:y2
Where n specifies how many points of coordinate. xx and yy are two arrays storing and coordinates on the line.
You can also plot the line by
plot(xx,yy)
answered Nov 15 '18 at 3:00
Banghua ZhaoBanghua Zhao
1,2851720
add a comment |
If you have two points, (x1, y1) and (x2, y2), you can directly obtain the line coordinates by slicing:
n = 100;
xx=x1:(x2-x1)/n:x2
yy=y1:(y2-y1)/n:y2
Where n specifies how many points of coordinate. xx and yy are two arrays storing and coordinates on the line.
You can also plot the line by
plot(xx,yy)
answered Nov 15 '18 at 3:00
Banghua ZhaoBanghua Zhao
1,2851720
add a comment |
If you have two points, (x1, y1) and (x2, y2), you can directly obtain the line coordinates by slicing:
n = 100;
xx=x1:(x2-x1)/n:x2
yy=y1:(y2-y1)/n:y2
Where n specifies how many points of coordinate. xx and yy are two arrays storing and coordinates on the line.
You can also plot the line by
plot(xx,yy)
answered Nov 15 '18 at 3:00
Banghua ZhaoBanghua Zhao
1,2851720
If you have two points, (x1, y1) and (x2, y2), you can directly obtain the line coordinates by slicing:
n = 100;
xx=x1:(x2-x1)/n:x2
yy=y1:(y2-y1)/n:y2
Where n specifies how many points of coordinate. xx and yy are two arrays storing and coordinates on the line.
You can also plot the line by
plot(xx,yy)
answered Nov 15 '18 at 3:00
Banghua ZhaoBanghua Zhao
1,2851720
answered Nov 15 '18 at 3:00
Banghua ZhaoBanghua Zhao
1,2851720
answered Nov 15 '18 at 3:00
Banghua ZhaoBanghua Zhao
1,2851720
answered Nov 15 '18 at 3:00
Banghua ZhaoBanghua Zhao
1,2851720
1,2851720
add a comment |
add a comment |
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