在 Matlab 中，如何使用代码生成直线与原点相交的图形？

Question

我正在尝试使用 Matlab 生成折线图，但该线在最后一点终止，并没有一直延伸到原点。有什么方法可以让这条线超出代码中的点吗？

我附上了我目前正在使用的代码，以及图表现在的样子和我想要的样子的图片。

%Enter Data
fnet = [0.465, 0.560, 0.670, 0.763, 0.870, 0.971, 1.063];
faccel = [0.434, 0.514, 0.612, 0.684, 0.776, 0.850, 0.915];
asys = [0.4963, 0.6034, 0.7074, 0.8088, 0.9210, 1.030, 1.138]
mh = [0.050, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11]
x = fnet;
y = asys;

%Model Equation
model = 'm*x'
%the model can be changed, ex. m*x^2
IV = 'x'
DV = 'y'

%Create and perform curve fit
newfit = fittype(model, 'Independent', IV, 'Dependent', DV);
%result and goodness of fit, prime symbol converys rows to columns
[result, gof] = fit(x', y', newfit, 'StartPoint', 1)

%plot fits and data points, create plot object for formatting
p = plot(result, x, y);

%style the data points
p(1).MarkerSize = 10;
p(1).Marker = '.';
p(1).MarkerFaceColor = 'blue';
%p(1).MarkerEdgeColor = 'green';

%style the line of best fit
p(2).LineWidth = 1;
p(2).Color = 'black';

%Create graph object, set formatting to latex
graph = gca;
set(graph, 'defaultTextInterpreter', 'latex');
set(legend, 'visible', 'off');

%format title and subtitle
graph.Title.String = {'System Acceleration vs. Net Force on System', 'in Modified Atwood Machine'};
graph.Title.FontSize = 16;
%subtitle, where we will place our equation and statistics
%specifically, the equation w/ units, r squared, slope with plusminus %
graph.Subtitle.Interpreter = 'latex';
graph.Subtitle.String = '$a_{sys} = 1.064 m^{-1}F_{net}, \, r^2=0.9994, m=1.064 \pm 0.007$';
graph.Subtitle.FontSize = 13;


%format x and y axes
graph.XLabel.Interpreter = 'latex';
graph.XLabel.String = '$F_{net} \: (N)$';
graph.XLabel.FontSize = 15;
graph.XLim = [0,1.5];
graph.XGrid = 'on';
graph.XMinorGrid = 'on';
graph.XMinorTick = 'on';

graph.YLabel.Interpreter = 'latex';
graph.YLabel.String = '$a_{sys} \: (\frac{m}{s^2})$';
graph.YLabel.FontSize = 15;
graph.YLim = [0,1.5];
graph.YGrid = 'on';
graph.YMinorGrid = 'on';
graph.YMinorTick = 'on';

Answer 1

不是直接在合适的 result 对象上使用 plot，而是可以调用 plot 并进行更多控制，并直接为行 result 计算 result =19=]

替换为：

p = plot(result, x, y);

有了这个：

hold on
p(1) = plot( x, y );
p(2) = plot( [0,2.2], feval(result, [0,2.2]) );

请注意，如果需要，您现在可以在 plot 调用期间添加标记和线条选项，而不是事后更新 p(1) 和 p(2)。

在 Matlab 中，如何使用代码生成直线与原点相交的图形？

How do I use code to generate a graph where the line crosses the origin in Matlab?

matlab

matlab-figure