please show me how to use 'line commander'

hello!

i want to know how to use 'line commander'

Error: Value is not a numeric scalar value ( i wonder about this. x_p(1) = 3 x_p(2)= 2.9968 ... isn't it scalar value?)

u=line(x,y,'Color','k','LineWidth','2');

what is the matter?

in advance, person that answers my questiion. thank you!

for i=1:length(time) %length(time) =100
    n2=fix(length(time)/n1); % n1=30
    hold on
    axis equal
    x=[0 x_p(i)];  %x_p(i) is 100*1 matrix
    y=[0 y_p(i)];  %y_p(i) is 100*1 matrix
    u=line(x,y,'Color','k','LineWidth','2');
    F(i)=getframe;
    if(i==length(time))
        break;
    end
    if(0==rem(i,n2))
    else
    delete(u)
    end

Answer 1

[Walter Roberson]

    u=line(x,y,'Color','k','LineWidth',2);

[상태 박]

oh my god

[Image Analyst]

Yes, LineWidth is a number not a character. Here are a few more improvements.

numPoints = 100; % or length(time)
x_p = rand(numPoints, 1); % Or however you defined the.
y_p = rand(numPoints, 1);
n1 = 30;
hold on
axis equal
for k = 1 : numPoints %length(time) =100
	n2=fix(numPoints/n1); % n1=30
	% Get endpoints of the line into a 2 element vector.
	x=[0, x_p(k)];  %x_p(i) is 100*1 matrix
	y=[0, y_p(k)];  %y_p(i) is 100*1 matrix
	% Call the line function to draw a black line.
	u=line(x,y, 'Color','k', 'LineWidth', 2);
	% Get the handle to the graphics in the axes.
	F(k) = getframe;
	if rem(k,n2) == 0
		% Do something
	else
		% Delete the line we just drew.
		delete(u)
	end
end

Can you please Accept Walter's answer now to give him "reputation points"? Thanks in advance.

[Walter Roberson]

If you are going to draw a line and then erase it, then it is more efficient to instead create the line just once and to update its XData and YData properties the other times.

[상태 박]

thank you very much!