Function out of proportion/wrong while in matlab?
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Hi, I'm trying to use a function I made using graphing calculators, but when i type it in and plot in in matlab, it's not the same line.
syms x
y2 = 0.0000772436429838*x^3+0.0146583319491*x^2 -0.184551271403*x+4.99872818128;
fplot(y2)
When It should look something more like this according to both geogebra and desmos graphic calculators (Screenshot attached)
采纳的回答
You have to define the x-range over which you want to plot the function.
syms x
y2 = 0.0000772436429838*x^3+0.0146583319491*x^2 -0.184551271403*x+4.99872818128;
%Calling fplot with a specific range for x values
fplot(y2,[-250 100])
%Modifying to make the plot look similar to the screenshot
%Changing x and y limits
xlim([-250 250])
ylim([-100 200])
%Add lines to appear as the axes
xline(0)
yline(0)
3 个评论
An alternative to using xline and yline to plot the x- and y-axis lines is setting the XAxisLocation and YAxisLocation properties of the axes to 'origin', which also puts the x- and y-ticks along the axis lines.
syms x
y2 = 0.0000772436429838*x^3+0.0146583319491*x^2 -0.184551271403*x+4.99872818128;
%Calling fplot with a specific range for x values
fplot(y2,[-250 100])
%Modifying to make the plot look similar to the screenshot
%Changing x and y limits
xlim([-250 250])
ylim([-100 200])
%Setting up X- and Y-Axis
set(gca(),'XAxisLocation','origin','YAxisLocation','origin')
Dyuman Joshi
2023-9-5
Yes, Spot on.
Voss
2023-9-5
Right! Done.
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