How to make a line given a point through which it is passing through and angle from x-axis.

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TAPAS 2020-4-24

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https://ww2.mathworks.cn/matlabcentral/answers/520533-how-to-make-a-line-given-a-point-through-which-it-is-passing-through-and-angle-from-x-axis

评论： Ameer Hamza 2020-4-25

I want to make a line passing through a point and having slope. And want to check which data points lie on the line. Like given in the figure I want to draw AB line.

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采纳的回答

Ameer Hamza 2020-4-24

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https://ww2.mathworks.cn/matlabcentral/answers/520533-how-to-make-a-line-given-a-point-through-which-it-is-passing-through-and-angle-from-x-axis#answer_428249

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Try this

x = 103.3;
y = 31.1;
angle_yAxis = 139;
angle_xAxis = 90 + (180-139);
slope = tand(angle_xAxis);
x_range = 102:0.01:106;
y_range = slope*(x_range - x) + y;
figure;
plot(x, y, '+', 'LineWidth', 2, 'MarkerSize', 8);
hold on
plot(x_range, y_range);
xlim([102 106]);
ylim([30 33]);