How to make a line of fixed length?
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Mariam Shahab
am 29 Nov. 2022
Kommentiert: Star Strider
am 29 Nov. 2022
Hi all,
I want to make a line that has a fixed length and it has a partciular direction. I would appreciate any suggestions for this. Thanks!
2 Kommentare
Davide Masiello
am 29 Nov. 2022
I am afraid you need to be clearer. By making, do you mean plotting?
Moreover, what do you mean with direction?
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Star Strider
am 29 Nov. 2022
It is relatively straightforward to write an anonymous function for this —
createLine = @(startpt, slope, len) [startpt(1) startpt(1)+len.*cos(atan(slope)); startpt(2) startpt(2)+len.*sin(atan(slope))];
slope = rand % Scalar
startpoint = rand(1,2) % Two-Element Vector
long = 10*rand % Scalar
linevec = createLine(startpoint, slope, long)
Check = [tan(atan2(diff(linevec(2,:)), diff(linevec(1,:)))) hypot(diff(linevec(2,:)),diff(linevec(1,:)))]
figure
plot(linevec(1,:), linevec(2,:))
grid
axis('padded','equal')
title(sprintf('Line from (%.2f, %.2f) to (%.2f, %.2f), slope %.2f, length %.2f', [linevec(:,1); linevec(:,2); slope; long]))
Experiment with the ‘createLine’ function.
.
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Vilém Frynta
am 29 Nov. 2022
You can specify length with numbers of your choice.
You can specify direction numerically as well, you just need to use your imagination and get creative.
x = [1 11];
y = [2 22];
line(x,y);
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